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ORGANIC SPECTROSCOPY

Read all about Organic Spectroscopy on ORGANIC SPECTROSCOPY INTERNATIONAL 

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DR ANTHONY MELVIN CRASTO Ph.D

DR ANTHONY MELVIN CRASTO Ph.D

DR ANTHONY MELVIN CRASTO, Born in Mumbai in 1964 and graduated from Mumbai University, Completed his Ph.D from ICT, 1991,Matunga, Mumbai, India, in Organic Chemistry, The thesis topic was Synthesis of Novel Pyrethroid Analogues, Currently he is working with GLENMARK PHARMACEUTICALS LTD, Research Centre as Principal Scientist, Process Research (bulk actives) at Mahape, Navi Mumbai, India. Total Industry exp 30 plus yrs, Prior to joining Glenmark, he has worked with major multinationals like Hoechst Marion Roussel, now Sanofi, Searle India Ltd, now RPG lifesciences, etc. He has worked with notable scientists like Dr K Nagarajan, Dr Ralph Stapel, Prof S Seshadri, Dr T.V. Radhakrishnan and Dr B. K. Kulkarni, etc, He did custom synthesis for major multinationals in his career like BASF, Novartis, Sanofi, etc., He has worked in Discovery, Natural products, Bulk drugs, Generics, Intermediates, Fine chemicals, Neutraceuticals, GMP, Scaleups, etc, he is now helping millions, has 9 million plus hits on Google on all Organic chemistry websites. His friends call him Open superstar worlddrugtracker. His New Drug Approvals, Green Chemistry International, All about drugs, Eurekamoments, Organic spectroscopy international, etc in organic chemistry are some most read blogs He has hands on experience in initiation and developing novel routes for drug molecules and implementation them on commercial scale over a 30 year tenure till date Dec 2017, Around 35 plus products in his career. He has good knowledge of IPM, GMP, Regulatory aspects, he has several International patents published worldwide . He has good proficiency in Technology transfer, Spectroscopy, Stereochemistry, Synthesis, Polymorphism etc., He suffered a paralytic stroke/ Acute Transverse mylitis in Dec 2007 and is 90 %Paralysed, He is bound to a wheelchair, this seems to have injected feul in him to help chemists all around the world, he is more active than before and is pushing boundaries, He has 9 million plus hits on Google, 2.5 lakh plus connections on all networking sites, 50 Lakh plus views on dozen plus blogs, He makes himself available to all, contact him on +91 9323115463, email amcrasto@gmail.com, Twitter, @amcrasto , He lives and will die for his family, 90% paralysis cannot kill his soul., Notably he has 19 lakh plus views on New Drug Approvals Blog in 216 countries......https://newdrugapprovals.wordpress.com/ , He appreciates the help he gets from one and all, Friends, Family, Glenmark, Readers, Wellwishers, Doctors, Drug authorities, His Contacts, Physiotherapist, etc

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Olanexidine, オラネキシジングルコン酸塩


STR1

Olanexidine Gluconate

OPB-2045G, Gluconate olanexidin,  Olanedine,  OPB-2045,  OPB 2045G, 

(Olanedine®)Approved in Japan PMDA 2015-07-03, Olanedine® by Otsuka

Image result for JAPAN ANIMATED FLAG

A disinfectant uesd to prevent of postoperative bacterial infections.

OLANEXIDINE Structure

CAS .146510-36-3(Olanexidine free form), 

Imidodicarbonimidic diamide, N-((3,4-dichlorophenyl)methyl)-N’-octyl

C17H27Cl2N5
Formula Weight: 372.341

STR1

CAS 799787-53-4(Olanexidine Gluconate)

568.49
Formula C17H27Cl2N5 ● C6H12O7

1-(3,4-Dichlorobenzyl)-5-octylbiguanide mono-D-gluconate

オラネキシジングルコン酸塩
Olanexidine Gluconate

C17H27Cl2N5▪C6H12O7 : 568.49
[799787-53-4]

Indication:Bacterial infection

Otsuka (Originator)

Image result for otsuka logo

  • Marketed Bacterial infections

Image result for Olanedine®

Most Recent Events

  • 16 Sep 2015 Launched for Bacterial infections (Prevention) in Japan (Topical)
  • 03 Jul 2015 Registered for Bacterial infections (Prevention) in Japan (Topical) – First global approval
  • 30 Sep 2014 Preregistration for Bacterial infections (Prevention) in Japan (Topical)
  • Image result for JAPAN ANIMATED FLAG

SEE ALSO

Image result for Olanexidine

Olanexidine hydrochloride [USAN]

146509-94-6 HCL
RN: 218282-71-4 HCL HYDRATE
UNII: R296398ALN

Molecular Formula, C17-H27-Cl2-N5.Cl-H.1/2H2-O

Molecular Weight, 835.6192

Imidodicarbonimidic diamide, N-((3,4-dichlorophenyl)methyl)-N’-octyl-, monohydrochloride, hydrate (2:1)

INTRODUCTION

Olanexidine gluconate was approved by Pharmaceuticals and Medical Devices Agency of Japan (PMDA) on Jul 03, 2015. It was developed and marketed as Olanedine® by Otsuka in Japan.

Olanexidine gluconate is an antiseptic/disinfectant compound with potent bactericidal activity against Gram-negative and Gram-positive bacteria, for use in preparing patients for surgery and preventing of postoperative bacterial infections.

Olanedine® is available as topical solution (1.5%), containing 3 g/200 mL, 0.15 g/10 mL and 0.375 g/25 mL, and the recommendation is applying appropriate amount of the drug.

PRODUCT PATENT

WO 2004105745

Kazuyoshi Miyata, Yasuhide Inoue, Akifumi Hagi, Motoya Kikuchi, Hitoshi Ohno, Kinji Hashimoto, Kinue Ohguro, Tetsuya Sato,Hidetsugu Tsubouchi, Hiroshi Ishikawa,Takashi Okamura, Koushi Iwata,

Otsuka Pharmaceutical Co., Ltd., Otsuka Pharmaceutical Factory, Inc.

SYNTHESIS

PATENT

CN1065453A

http://www.google.com.au/patents/CN1065453A?cl=en

PATENT

WO2008026757A1

https://google.com/patents/WO2008026757A1?cl=en

Example 1: l-cyano-3-n-octylguanidine

A 7.00-kg quantity of Compound (4) (54.16 mol) was dissolved in 105 liters of ethyl acetate, and the resulting mixture was cooled to 5°C or below. A 2.66-kg quantity of concentrated sulfuric acid (27.12 mol) was added thereto dropwise at a temperature of 4O0C or below while stirring. To the thus- obtained suspension of 1/2 sulfate of Compound (4) was added 5.06 kg of sodium dicyanamide (56.83 mol), and the resulting suspension was heated under reflux for 7 hours. The reaction solution was cooled to 400C or below, and 70 liters of water was added thereto. Subsequently, the resulting solution was heated to 80 to 900C (internal temperature) to distill the ethyl acetate off. The remaining liquid was cooled to 400C or below, and 70 liters of toluene was then added thereto, followed by the extraction of 1-cyano — 3-n-octyl guanidine at about 500C. The extracted toluene layer was washed with 35 liters of water at about 500C and cooled to 100C or below, followed by stirring for about 30 minutes. The resulting precipitated crystals were separated and washed with 7 liters of toluene. The resulting crystals were dried at 400C for 7.5 hours, yielding l-cyano-3-n- octylguanidine. 2007/067107

-16-

Yield: 9.11 kg (The yield was 85.7% based on the Compound(4).) White crystals having a melting point of 69 to 740C (no clear melting point was observed)

IR(KBr) spectrum: 3439, 3296, 2916, 2164, 1659, 1556, 1160, 718, and 572 cm“1

Thermogravimetric measurement/differential thermal analysis: 73.5°C (weak), an endothermic peak at 77.50C

1H-NMR(CDCl3) spectrum: 0.88 ppm (t, J = 6.6 Hz, 3H), 1.20-1.38 ppm (m, 10H), 1.43-1.62 ppm (m, 2H), 3.17 ppm (dd, J = 6.9 Hz, J = 6.0 Hz, 2H), 5.60-5.70 ppm (bs, 2H), 5.80-5.95 ppm (bs, IH)

Reference Example 2: Acidolysis of 1- (3,4-dichlorobenzyl) -5- octylbiguanide dihydrochloride

A 1-g quantity of 1- (3, 4-dichlorobenzyl) -5-octyl biguanide dihydrochloride was dissolved in 15 ml of 10% ethanol, followed by refluxing for 5 hours. HPLC analysis was conducted under the conditions described below.

The yield of 1-[N- (3,4-dichlorobenzyl) carbamoyl-3- octyl]guanidine (holding time: 9.84 minutes) was 0.91%, and the yield of 1- (N-octyl-carbamoyl) -3- (3, 4-dichlorobenzyl) guanidine

(holding time: 10.54 minutes) was 0.22%.

HPLC analysis conditions:

Column: YMC AM302 4.6 mm I. D. x 150 mm

Eluate: MeCN/0.05 M aqueous solution of sodium 1- octanesulfonate/acetic acid = 700/300/1

Detector: UV 254 nm

The physical property values of the resulting 1-[N- (3,4- dichlorobenzyl) carbamoyl-3-octyl] guanidine were as follows: NMR (DMSO-de) δ: 0.86 (3H, t, J = 6.0 Hz), 1.07-1.35 (1OH, m) , 1.35-1.49 (2H, m) , 2.95-3.15 (2H, m) , 4.12 (2H, d, J = 6.3 Hz), 6.78-7.40 (4H, m) , 7.23 (IH, dd, J = 2.1 Hz, J = 8.4 Hz), 7.46 (IH, d, J = 2.1 Hz), 7.54 (IH, d, J = 8.4 Hz)

The physical property values of the resulting 1- (N-octyl- carbamoyl) -3- (3, 4-dichlorobenzyl) guanidine were as follows: NMR (DMSO-d6) δ: 0.85 (3H, t, J = 6.6 Hz), 1.02-1.40 (12H, m) , 2.89-2.95 (2H, m) , 4.33 (2H, bs) , 5.76-7.00 (4H, m) , 7.28 (IH, dd, J = 2.1 Hz, J = 8.1 Hz), 7.52 (IH, d, J = 2.1 Hz), 7.58 (IH, d, J = 8.1 Hz)

Example 1: 1- (3, 4-dichlorobenzyl) -5-octylbiguanide monohydrochloride 1/2 hydrate

A 9.82-g quantity of Compound (2) (0.05 mol) and 10.63 g of 3, 4-dichlorobenzylamine (0.05 mol) were added to 49 ml of butyl acetate, followed by refluxing for 6 hours. The reaction solution was concentrated under reduced pressure, and a mixture of 12 ml of water and 47 ml of isopropyl alcohol was added and dissolved into the remainder. To the thus-obtained solution was added, dropwise, 10.13 g of concentrated hydrochloric acid. The resulting mixture was stirred at 28 to 300C for 30 minutes, and the precipitated crystals were then filtered out. The thus- obtained crystals were washed with a small amount of isopropyl alcohol, yielding 23.42 g of (non-dried) 1- (3, 4-dichlorobenzyl) – 5-octylbiguanide dihydrochloride. The resulting crystals were suspended in 167 ml of water without drying, the suspension was then stirred at 25 to 27°C for 2 hours, followed by separation of the crystals by filtration. The thus-obtained crystals were washed with a small amount of water and dried at 400C for 20 hours, yielding 17.05 g of 1- (3, 4-dichlorobenzyl) -5-octyl biguanide monohydrochloride 1/2 hydrate having a purity of 99.9% at a yield of 81.6%.

Example 2 : 1- (3, 4-dichlorobenzyl) -5-octylbiguanide dihydrochloride

A 100-g quantity of Compound (4) (0.774 mol) was dissolved in 1 liter of n-butyl acetate, and 37.6 g of concentrated sulfuric acid (0.383 mol) was added thereto while stirring. To the thus-obtained suspension of 1/2 sulfate of Compound (4) was added 68.9 g of sodium dicyanamide (0.774 mol), 7107

-18- and the resulting suspension was heated under reflux for 3 hours. The reaction solution was cooled to about 200C, and the organic layer thereof was sequentially washed with about 500 ml each of (i) 5% hydrochloric acid, (ii) 5% aqueous caustic soda solution, (iii) 5% aqueous sodium bicarbonate solution, and (iv) water.

To the thus-obtained n-butyl acetate solution of Compound (2) were added 118.5 g of Compound (3) (0.673 mol) and then 58.4 ml of concentrated hydrochloric acid while stirring. The reaction solution was heated, and about 800 ml of n-butyl acetate was distilled off under atmospheric pressure (ordinary pressure) , followed by heating the reaction solution under reflux for 3.5 hours . Subsequently, the reaction solution was cooled to about 400C, and 900 ml of isopropanol, 100 ml of water, and 134 ml of concentrated hydrochloric acid were added thereto. The mixture was stirred at 60 to 70°C for 1 hour and cooled to 100C or below and the precipitated crystals were then separated. The resulting crystals were washed with 200 ml of isopropanol and dried at 6O0C, yielding 1- (3, 4-dichlorobenzyl) -5-octylbiguanide dihydrochloride. Yield: 243.8 g (The yield was 81.3% based on the Compound (3).) Melting point: 228.90C IR(KBr) spectrum: 2920, 1682, 1634, 1337, 1035, 820, and 640 cm“1

PATENT

WO2004105745A1

PATENT

WO2009142715A1

STR1

PATENT

https://www.google.com/patents/US8334248

Olanexidine is a compound with high bactericidal activity having the chemical name 1-(3,4-dichlorobenzyl)-5-octylbiguanide. Research has been carried out into bactericides containing, olanexidine hydrochloride as an active ingredient (see Japanese Patent No. 2662343, etc.).

Olanexidine has very poor solubility in water, and hitherto known salts of olanexidine are also poorly soluble in water. For example, the solubility at 0° C. of olanexidine hydrochloride in water has been measured to be less than 0.05% (W/V), and the solubility of free olanexidine is a further order of magnitude less than this. Consequently, sufficient bactericidal activity cannot be expected of an aqueous solution merely having olanexidine dissolved therein, and moreover, depending on the conditions the olanexidine may precipitate out.

In the case of making an aqueous preparation of olanexidine in particular, to make the concentration of the olanexidine sufficient for exhibiting effective bactericidal activity, and to reduce the possibility of the olanexidine precipitating out, it has thus been considered necessary to use a dissolution aid such as a surfactant.

EXAMPLE 1 Preparation of an Aqueous Solution Aqueous Solution 1

20.9 g (50 mmol) of olanexidine hydrochloride hemihydrate was added to 250 mL of a 1 N aqueous sodium hydroxide solution, and the suspension was stirred for 1.5 hours at room temperature (25° C.). The solid was filtered off, and washed with water. The solid obtained was further suspended in 250 mL of purified water, the suspension was stirred for 5 minutes at room temperature, and the solid was filtered off, and washed with water. This operation was carried out once more to remove sodium chloride formed. The solid obtained (free olanexidine) was put into purified water in which 8.9 g (50 mmol) of gluconolactone had been dissolved, and the mixture was stirred at room temperature until the solid dissolved, and then purified water was further added to give a total volume of 300 mL. The concentration of olanexidine in the aqueous solution obtained was measured by using high performance liquid chromatography to be 6% in terms of free olanexidine.

This aqueous solution was still transparent and colorless even after being left for several months at room temperature.

CLIP

http://dmd.aspetjournals.org/content/28/12/1417/F9.expansion.html

Image result for Olanexidine

Image result for Olanexidine

REFERENCES

http://www.otsukakj.jp/en/news/photo/photo-14423716650.pdf

Patent ID Date Patent Title
US8979785 2015-03-17 Fluid application device and method
US8911771 2014-12-16 Fluid application device and method
US8858484 2014-10-14 Fluid application device and method
US2013330114 2013-12-12 FLUID APPLICATION DEVICE AND METHOD
US2012095254 2012-04-19 METHOD AND APPARATUS FOR PREPARING A SOLUTION OF A SHEAR SENSITIVE MATERIAL
US7868207 2011-01-11 PROCESS FOR PRODUCING 1-(3, 4-DICHLOROBENZYL)-5-OCTYLBIGUANIDE OR A SALT THEREOF
US2010331421 2010-12-30 DISINFECTANT AND/OR BACTERICIDAL AQUEOUS COMPOSITIONS
US2010331423 2010-12-30 AQUEOUS SOLUTION OF OLANEXIDINE, METHOD OF PREPARING THE AQUEOUS SOLUTION, AND DISINFECTANT
US7829518 2010-11-09 Aqueous solution of olanexidine, method of preparing the aqueous solution, and disinfectant
US7825080 2010-11-02 Aqueous solution of olanexidine, method of preparing the aqueous solution, and disinfectant
Patent ID Date Patent Title
US7622469 2009-11-24 2, 4-diamino-1, 3, 5-triazine derivatives
US2009287021 2009-11-19 METHOD AND APPARATUS FOR PREPARING A SOLUTION OF A SHEAR SENSITIVE MATERIAL
US2007053942 2007-03-08 Disinfectant and/or bactericidal aqueous compositions
EP0507317 1997-01-15 BIGUANIDE DERIVATIVES, MANUFACTURING METHOD THEREOF, AND DISINFECTANTS CONTAINING THE DERIVATIVES
EP0507317A2 * Apr 3, 1992 Oct 7, 1992 Otsuka Pharmaceutical Co., Ltd. Biguanide derivatives, manufacturing method thereof, and disinfectants containing the derivatives
EP1634589A1 * May 25, 2004 Mar 15, 2006 Otsuka Pharmaceutical Co., Ltd. Aqueous olanexidine solution, method of preparing the same, and disinfectant
Reference
1 * TSUBOUCHI H ET AL: “Synthesis and Structure-Activity Relationships of Novel Antiseptics” BIOORGANIC & MEDICINAL CHEMISTRY LETTERS, OXFORD, GB, vol. 7, no. 13, 8 July 1997 (1997-07-08), pages 1721-1724, XP004136287 ISSN: 0960-894X

//////////Olanexidine Gluconate, OPB-2045G, (Olanedine®, Approved, japan 2015-07-03, Olanedine,  Otsuka, PMDA, Olanexidine, オラネキシジングルコン酸塩 , Gluconate olanexidin,  Olanedine,  OPB-2045,  OPB 2045G, JAPAN 2015

CCCCCCCCN=C(N)NC(=NCC1=CC(=C(C=C1)Cl)Cl)N

Clc1ccc(CNC(=N)NC(=N)NCCCCCCCC)cc1Cl.O=C(O)[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO

Eldecalcitol, an active vitamin D3 analog used to treat osteoporosis


Eldecalcitol

(1S,2S,3S,5Z)-5-[(2E)-2-[(1R,3aS,7aR)-1-[(2R)-6-hydroxy-6-methylheptan-2-yl]-7a-methyl-2,3,3a,5,6,7-hexahydro-1H-inden-4-ylidene]ethylidene]-2-(3-hydroxypropoxy)-4-methylidenecyclohexane-1,3-diol

(1R,2R,3R,5Z,7E)-2-(3-Hydroxypropyloxy)-9,10-secocholesta-5,7,10(19)-triene-1,3,25-triol

AC1O5QQ2;   CAS 104121-92-8;  AN-3697; ED 71, Edirol®
Molecular Formula: C30H50O5
Molecular Weight: 490.715 g/mol

APPROVED JAPAN , 2011-01-21, Chugai (Originator) , Roche,Taisho Toyama

Eldecalcitol was approved by Pharmaceuticals and Medicals Devices Agency of Japan (PMDA) on January 21, 2011. It was developed by Chugai Pharmaceutical (a member of Roche) and marketed as Edirol® by Chugai Pharmaceutical and Taisho.

Eldecalcitol is an orally active vitamin D analogue leading to greater absorption of bind calcium. It is usually used to treat osteoporosis.

Edirol® is available as capsule for oral use, containing 0.5 μg or 0.75 μg of free Eldecalcitol, and the recommended dose is 0.75 μg once daily.

ED-71, a vitamin D analog, is a more potent inhibitor of bone resorption than alfacalcidol in an estrogen-deficient rat model of osteoporosis. ED-71, effectively and safely increased lumbar and hip bone mineral density (BMD) in osteoporotic patients who also received vitamin D3 supplementation.

Eldecalcitol is a drug used in Japan for the treatment of osteoporosis.[1] It is an analog of vitamin D.[2] Osteoporosis is a common bone disease among the older generation, with an estimated prevalence of over 200 million people.[1] This condition often results in bone fractures due to abnormally low bone mass density, and is a leading cause of disability, especially among developed countries with longer average life spans. Osteoporosis is more common in women than with men.

AC1O5QQ2.pngEldecalcitol

Discovery

Chugai Pharmaceutical/Roche are the originators of the medicinal drug eldecalcitol through Taisho Pharmaceutical Holdings and Chugai Pharmaceutical. The trade name of eldecalcitol is Edirol, and its Chemical Abstracts Service (CAS) registry number is 104121-92-8. Eldecalcitol was approved for use in Japan on January 2011. The approval came from the Japanese Ministry of Health, Labor, and Welfare for the objective of a treatment for osteoporosis.[3]

Effects

Clinical trials have suggested that eldecalcitol, a vitamin D analog, has strong effects to reduce calcium reabsorption into the body from bones, therefore increasing bone mineral density, and to increase calcium absorption in intestines.[4] In animals, eldecalcitol inhibits the activity of osteoclasts for the function to reduce bone degradation for calcium, while still able to maintain osteoblast function so as to not hinder bone formation.[5] Unlike other vitamin D analogs, eldecalcitol does not significantly suppress parathyroid hormone levels, promising a better treatment for osteoporosis in comparison to other medications.[6] Bone mineral density increases with eldecalcitol use, in addition to strengthening bone structure. This occurs due to the function of the eldecalcitol drug, which decreases bone reabsorption as observed through a bone reabsorption marker. Bone geometry assessments show that eldecalcitol increases cortical bone area in patients with osteoporosis more so than other vitamin D analogs, such as alfacalcidol. There was also the maintenance of thickness of cortical bone mass, strongly indicating that eldecalcitol improves the strength and mass of bone, specifically cortical bone structure.[7] Adverse effects of eldecalcitol include an increase in blood and urinary calcium levels. Abnormally high levels of calcium can lead to problems associated with hypercalcemia.

Treatment for Osteoporosis

Eldecalcitol can be used for the treatment of hypocalcaemia or osteoporosis. Calcium absorption increases with the presence of eldecalcitol by the body, occurring in the intestines, which is useful for those who have low calcium levels. Eldecalcitol is more often used due to its effects to treat osteoporosis. In the aging population, the bone matrix becomes weakened through untreated osteoporosis. This leads to an increased risk of severe fractures that include spinal and hip fractures in addition to vertebral and wrist fractures. This creates a burden on the health care system due to a decline in the quality of life for the individuals that suffer from this condition. Some risk factors leading to the predisposition of developing osteoporosis are previous incidents of bone fractures and a reduction in bone mineral density.[1] These factors expectantly increase as age increases. Bone health is reliant on maintaining physiologically needed levels of calcium, where the body constantly maintains this calcium homeostasis through osteoblast and osteoclast activity. Osteoblast activity serves this function of maintaining appropriate calcium levels by depositing calcium in bones when blood calcium levels are above normal. In contrast, osteoclasts break down bone tissue to increase blood calcium levels if they are low.[8] This activity is performed after absorption of calcium by the body, which requires the actions of vitamin D. The active metabolite of vitamin D, calcitriol, performs its function through interactions with the calcitriol receptor. This nuclear hormone receptor is responsible for calcium absorption which, in turn, is involving in bone depletion and formation. The new analogs of vitamin D, such as eldecalcitol, are observed to have stronger effects in preventing bone loss, fractures, and falls in comparison to calcitriol.[9] Eldecalcitol is even more effective than its counterpart alfacalcidol, another vitamin D analog. Studies have shown eldecalcitol is more effective than alfacalcidol in preventing vertebral and wrist fractures, and even falls, with osteoporotic patients with vitamin D insufficiencies.[10] Eldecalcitol is also more effective at preventing fractures than vitamin D and calcium supplements.[1] Eldecalcitol increases calcium absorption for vitamin D deficient patients, and therefore could be used for osteoporosis treatment for all age groups.

Pharmacology

Analogs of vitamin D are being explored intensely for their regulatory effects on calcium metabolism with the purpose of treating osteoporosis, a skeletal disease associated with low bone mass and deterioration of bone tissue. Vitamin D is imperative for absorption of calcium to maintain bone strength.

Mechanism of Action

Eldecalcitol is an orally administered drug to patients, which binds to vitamin D receptors and binding protein for the goal of achieving greater specificity to bind calcium for its absorption. This greater affinity is 2.7-fold that of the active vitamin D form of calcitriol. Eldecalcitol is readily absorbed into the body, with a long elimination half-life of over eight hours, reaching maximum absorption in 3.4 hours.[1]

Dosage

Eldecalcitol is present in the form of pills for oral administration. In preclinical models with healthy male volunteers, oral doses of eldecalcitol ranged from 0.1 to 1.0 micrograms once daily to show an increase in bone mineral density.[11] Preclinical trials show improvements for doses at 0.5 and 0.75 micrograms, which are the recommended dosage amounts for the Edirol product as approved by the Japanese Ministry of Health, Labor, and Welfare for treating osteoporosis.[3]

Chemistry

The class of eldecalcitol is a vitamin D3 derivative. This molecule has a molecular weight of 490.71 grams per mole. The eldecalcitol analog of calcitriol, contains a hydroxypropyl group in the lower cyclohexane ring. The synthesis of eldecalcitol incorporates two units assembled together. The IUPAC names include (3S, 4S, 5R)-oct-1-en-7-yne-3,4,5-triol that is fused to a bicyclic system, (R)-6-((1R, 3aR, 7aR, E)-4-(bromomethylene)-7a-methyloctahydro-1H-inden-1-yl)-2-methylheptan-2-ol. The assembly process includes a Diels-Alder reaction to give the fully protected eldecalcitol. In order to get the parent molecule, the hydroxyl groups have to be deprotected. The chemistry of eldecalcitol allows for its binding 2.7-fold more potently than calcitriol. In addition, some vitamin D derivatives have been known to inhibit the serum parathyroid hormone. Eldecalcitol only weakly inhibits the serum parathyroid hormone, making it an even more appealing medicinal drug for its physiological uses in the treatment of osteoporosis.[3] Animal studies of eldecalcitol, in ovariectomized rats, show improvements in bone mass while lowering bone reabsorption to demonstrate its effectiveness in osteoporosis treatment.[5]

PAPER

Heterocycles,  Vol 92, No. 6, 2016, pp.1013-1029
Published online, 22nd March, 2016

DOI: 10.3987/REV-16-840
Diverse and Important Contributions by Medicinal Chemists to the Development of Pharmaceuticals: An Example of Active Vitamin D3 Analog, Eldecalcitol

Noboru Kubodera*

*International Institute of Active Vitamin D Analogs, 35-6, Sankeidai, Mishima, Shizuoka 411-0017, Japan

Abstract

Presented herein are diverse and important contributions by medicinal chemists to different stages of pharmaceutical development. The conceptual elements reviewed, which are intended for young chemists who engage in drug discovery research, draw upon the author’s experience in developing eldecalcitol, an active vitamin D3 analog used to treat osteoporosis. The review covers exploratory research for a lead candidate compound; process development for practical manufacturing; and synthesis of other compounds relevant to the program, such as tritiated compounds, postulated metabolites, and miscellaneous analogs for mode of action studies.

PAPER

Eldecalcitol [1α,25-dihydroxy-2β-(3-hydroxypropoxy)vitamin D3], an analog of calcitriol (1α,25-dihydroxyvitamin D3), possesses a hydroxypropoxy substituent at the 2β-position of calcitriol. Eldecalcitol has potent biological effects on bone disease such as osteoporosis. The marketing of eldecalcitol has very recently started in Japan. In consideration of this, we have been investigating practical synthesis of eldecalcitol for industrial-scale production. Eldecalcitol was initially synthesized in a linear manner. The 27-step linear sequence was, however, suboptimal due to its lengthiness and low overall yield (ca. 0.03%). Next, we developed a convergent approach based on the Trost coupling reaction, in which the A-ring fragment (ene-yne part obtained in 10.4% overall yield) and the C/D-ring fragment (bromomethylene part obtained in 27.1% overall yield) are coupled to produce the triene system of eldecalcitol (15.6%). Although the overall yield of the convergent synthesis was better than that of the linear synthesis, significant improvements were still necessary. Therefore, additional biomimetic studies were investigated. Process development for the practical production of eldecalcitol is described herein.

http://ar.iiarjournals.org/content/32/1/303/F3.expansion.html

Convergent synthesis of eldecalcitol (5) by coupling A-ring fragment 37 with C/D-ring fragment 40. Reagents and conditions: a: HO(CH2)3OH/t-BuOK, 120°C. b: t-BuCOCl/pyridine/CH2Cl2, rt. c: H2/Pd(OH)2/MeOH, rt. d: Me2C(OMe)2/TsOH/acetone, rt. e: DMSO/(COCl)2/CH2Cl2, −60°C. f: CH2=CHMgBr/THF, −60°C. g: t-BuCOCl/Et3N/DMAP/CH2Cl2, rt. h: 1 M HCl/MeOH, rt. i: Ph3P/DEAD/benzene, reflux. j: LiC ≡ CTMS/BF3-OEt2, −78°C. k: 10 N NaOH/MeOH, rt. l: TBSOTf/Et3N/CH2Cl2, 0°C. m: TESOTf/Et3N/CH2Cl2, 0°C. n: O3/CH2Cl2/MeOH, −78°C then NaBH4/MeOH, −78°C. o: NMO/TPAP/4Ams/CH2Cl2, rt. p: Ph3P+CH2BrBr/NaHMDS/ THF, −60°C to rt. q: (dba)3Pd2-CHCl3/PPh3/Et3N/toluene, reflux. r: TBAF/THF/toluene, reflux.

Industrial synthesis of alfacalcidol (4) and biomimetic synthesis of eldecalcitol (5) from cholesterol (42). Reagents and conditions: a: [Al(Oi-Pr)3]/cyclohexanone. b: DDQ/AcOEt. c: NaOEt/EtOH. d: NaBH4/MeOH/THF. e: Ac2O/DMPA/pyridine, rt. f: NBS/AIBN/n-hexane, reflux. g: γ-collidine/toluene, reflux. h: KOH/MeOH, rt. i: PTAD/CH2Cl2, rt. j: TBSCl/imidazole. k: MCPBA/CH2Cl2. l: DMI, 140°C. m: TBAF/THF. n: NaBH4/EtOH. o: 400 W high pressure mercury lamp/THF, 0°C then reflux without mercury lamp. p: HO(CH2)3OH/t-BuOK, 110°C. q: Microbial 25-hydroxylation.

 ROUTE1

Route 2

Reference:1. Anticancer. Res. 2012, 32, 303-310.

2. Drugs. Fut. 2005, 30, 450-461.

Route 3
Route 4

Reference:1. Bioorg. Med. Chem. Lett. 1997, 7, 2871-2874.

2. Anticance. Res. 2009, 29, 3571-3578.

3. Heterocycles 2009, 77, 323-331.

4. Heterocycles 2006, 70, 295-307.

Route 5

Reference:1. EP0503630A1.

2. Drugs Fut. 2005, 30, 450-461.

Route 6

Reference:1. Bioorg. Med. Chem. 1998, 6, 2517-2523.

References

  1. Sanford, M; McCormack, PL (2011). “Eldecalcitol: A review of its use in the treatment of osteoporosis”. Drugs 71 (13): 1755–70. doi:10.2165/11206790-000000000-00000. PMID 21902297.
  2. Hatakeyama, S; Yoshino, M (2010). “Synthesis and preliminary biological evaluation of 20-epieldecalcitol [20-epi-1α,25-dihydroxy-2β-(3-hydroxypropoxy)vitamin D3: 20-epi-ED-71]”. The Journal of Steroid Biochemistry and Molecular Biology 121 (1–2): 25–28.doi:10.1016/j.jsbmb.2010.03.041. PMID 20304058.
  3. Robichaud; Stamford; Weinstein; McAlpine; Primeau; Lowe; Bernstein; Bronson; Manoj, Desai (2012). Annual Reports in Medicinal Chemistry 47 (1st ed.). San Diego: Elsevier Inc. pp. 529–531. ISBN 9780123964922.
  4. Nogachi, Y; Kawate, H; Nomura, M; Takayanagi, R (2013). “Eldecalcitol for the treatment of osteoporosis”. Europe PubMed Central 8: 1313–1321. doi:10.2147/CIA.S49825.
  5. Smith, S; Doyle, N; Boyer, M; Chouinard, L; Saito, H (2013). “Eldecalcitol, a vitamin D analog, reduces bone turnover and increases trabecular an cortical bone mass, density, and strength in ovariectomized cynomolgus monkeys”. Bone 57 (1): 116–122.doi:10.1016/j.bone.2013.06.005. PMID 23774444.
  6. Harada, S; Uno, S; Takahashi, F; Saito, H (2010). “Eldecalcitol is less effective in suppressing parathyroid hormone compared to calcitriol in vivo“. The Journal of Steroid Biochemistry and Molecular Biology 121 (1–2): 281–283.doi:10.1016/j.jsbmb.2010.04.001. PMID 20398764.
  7. Nakamura, T; Takano, T; Fukunaga, M; Shiraki, M; Matsumoto, T (2013). “Eldecalcitol is more effective for the prevention of osteoporotic fractures than alfacalcidol”. Journal of Bone and Mineral Metabolism 31 (4): 417–422. doi:10.1007/s00774-012-0418-5.PMC 3709079. PMID 23575909.
  8. Matsuo, K; Irie, N (2008). “Osteoclast-osteoblast communication”. Archives of Biochemistry and Biophysics 473 (2): 201–209. doi:10.1016/j.abb.2008.03.027.PMID 18406338.
  9. Saito, H; Takeda, S; Amizuka, N (2013). “Eldecalcitol and calcitriol stimulates ‘bone minimodeling,’ focal bone formation without prior bone resorption, in rat trabecular bone”.The Journal of Steroid Biochemistry and Molecular Biology 136 (1): 178–182.doi:10.1016/j.jsbmb.2012.10.004.
  10. Matsumoto, T; Ito, M; Hayashi, Y; Hirota, T; Tanigawara, Y; Sone, T; Fukunaga, M; Shiraki, M; Nakamura, T (2011). “A new active vitamin D3 analog, eldecalcitol, prevents the risk of osteoporotic fractures—A randomized, active comparator, double-blind study”. Bone49 (4): 605–612. doi:10.1016/j.bone.2011.07.011. PMID 21784190.
  11. Harada, S; Mizoguchi, T; Kobayashi, Y; Nakamichi, Y; Takeda, S; Sakai, S; Takahashi, F; Saito, H; Yasuda, H; Udagawa, N; Suda, T; Takahashi, N (2012). “Daily administration of eldecalcitol (ED-71), an active vitamin D analog, increases bone mineral density by suppressing RANKL expression in mouse trabecular bone”. Journal of Bone and Mineral Research 27 (1): 461–473. doi:10.1002/jbmr.555.
No. Major Technical Classification Publication No. Patent No. Legal Status Filling Date Estimated Expiry Date
1 Preparation CN85108857A CN1008368B Granted/expired 1985/12/4 2005/12/4
2 Crystal CN1223639A CN1216861C Granted 1997/6/16 2017/6/16
3 Preparation CN1637017A CN1276927C
Patent ID Date Patent Title
US7927613 2011-04-19 Pharmaceutical co-crystal compositions
US7323580 2008-01-29 CRYSTALS OF A VITAMIN D DERIVATIVE AND A METHOD FOR THE PREPARATION THEREOF
US7235679 2007-06-26 Crystals of a vitamin D derivative and a method for the preparation thereof
EP0924199 2006-05-10 CRYSTALS OF VITAMIN D DERIVATIVES AND PROCESS FOR THE PREPARATION THEREOF
US2005009794 2005-01-13 Crystals of a vitamin D derivative and a method for the preparation thereof
US6831183 2004-12-14 Crystals of a vitamin D derivative and a method for the preparation thereof
US6448421 2002-09-10 CRYSTALS OF VITAMIN D DERIVATIVES AND PROCESS FOR THE PREPARATION THEREOF
Eldecalcitol
Eldecalcitol.svg
Systematic (IUPAC) name
(1S,2S,3S,5Z,7E)-2-(3-Hydroxypropoxy)-9,10-secocholesta-5,7,10-triene-1,3,25-triol
Clinical data
Trade names Edirol
Identifiers
CAS Number 104121-92-8
ATC code None
PubChem CID 6438982
ChemSpider 4943418
Chemical data
Formula C30H50O5
Molar mass 490.715 g/mol

///////////eldecalcitol, active vitamin D3 analog,  treat osteoporosis, AC1O5QQ2, 104121-92-8,   AN-3697, ED 71, ED-71, Edirol®, PMDA, JAPAN

O[C@H]1CC(\C(=C)[C@H](O)[C@H]1OCCCO)=C\C=C2/CCC[C@]3([C@H]2CC[C@@H]3[C@H](C)CCCC(O)(C)C)C

OR

CC(CCCC(C)(C)O)C1CCC2C1(CCCC2=CC=C3CC(C(C(C3=C)O)OCCCO)O)C

Trelagliptin


File:Trelagliptin.svg

TRELAGLIPTIN.png

Trelagliptin

865759-25-7; UNII-Q836OWG55H

Molecular Formula: C18H20FN5O2
Molecular Weight: 357.382103 g/mol

2-[[6-[(3R)-3-aminopiperidin-1-yl]-3-methyl-2,4-dioxopyrimidin-1-yl]methyl]-4-fluorobenzonitrile

(R) -2 – ((6 (3-amino-piperidin-1-yl) -3-methyl-2,4-dioxo-3,4-dihydropyrimidine -1 (2H) – yl) methyl) synthesis of 4-fluoro-benzonitrile

(R)-2-((6-(3-amino-3-methylpiperidin-l-yl)-3-methyl-2,4-dioxo-3,4-dihydropyrimidin-l(2H)-yl)methyl)-4-fluorobenzonitrile

A dipeptidyl peptidase-4 (DPP-4) inhibitor used to treat type 2 diabetes.

Research Code SYR-472
CAS No. 865759-25-7 (Trelagliptin)

1029877-94-8 (Trelagliptin Succinate)

Dipeptidyl Peptidase IV (IUBMB Enzyme Nomenclature EC.3.4.14.5) is a type π membrane protein that has been referred to in the literature by a wide a variety of names including DPP4, DP4, DAP-IV, FAPβ, adenosine deaminase complexing protein 2, adenosine deaminase binding protein (AD Abp), dipeptidyl aminopeptidase IV; Xaa-Pro-dipeptidyl-aminopeptidase; Gly-Pro naphthylamidase; postproline dipeptidyl aminopeptidase IV; lymphocyte antigen CD26; glycoprotein GPI lO; dipeptidyl peptidase IV; glycylproline aminopeptidase; glycylproline aminopeptidase; X-prolyl dipeptidyl aminopeptidase; pep X; leukocyte antigen CD26; glycylprolyl dipeptidylaminopeptidase; dipeptidyl-peptide hydrolase; glycylprolyl aminopeptidase; dipeptidyl-aminopeptidase IV; DPP ΓV/CD26; amino acyl-prolyl dipeptidyl aminopeptidase; T cell triggering molecule TρlO3; X-PDAP. Dipeptidyl Peptidase IV is referred to herein as “DPP-IV.” [0003] DPP-W is a non-classical serine aminodipeptidase that removes Xaa-Pro dipeptides from the amino terminus (N-terminus) of polypeptides and proteins. DPP-IV dependent slow release of dipeptides of the type X-GIy or X-Ser has also been reported for some naturally occurring peptides.
DPP-IV is constitutively expressed on epithelial and endothelial cells of a variety of different tissues (intestine, liver, lung, kidney and placenta), and is also found in body fluids. DPP-IV is also expressed on circulating T-lymphocytes and has been shown to be synonymous with the cell-surface antigen, CD-26. DPP-IV has been implicated in a number of disease states, some of which are discussed below.
[0005] DPP-IV is responsible for the metabolic cleavage of certain endogenous peptides (GLP-I (7-36), glucagon) in vivo and has demonstrated proteolytic activity against a variety of other peptides (GHRH, NPY, GLP-2, VIP) in vitro.

GLP-I (7-36) is a 29 amino-acid peptide derived by post-translational processing of proglucagon in the small intestine. GLP-I (7-36) has multiple actions in vivo including the stimulation of insulin secretion, inhibition of glucagon secretion, the promotion of satiety, and the slowing of gastric emptying. Based on its physiological profile, the actions of GLP-I (7-36) are believed to be beneficial in the prevention and treatment of type II diabetes and potentially obesity. For example, exogenous administration of GLP-I (7-36) (continuous infusion) in diabetic patients has been found to be efficacious in this patient population. Unfortunately, GLP-I (7-36) is degraded rapidly in vivo and has been shown to have a short half -life in vivo (t1/2=1.5 minutes).
Based on a study of genetically bred DPP-IV knock out mice and on in vivo I in vitro studies with selective DPP-IV inhibitors, DPP-IV has been shown to be the primary degrading enzyme of GLP-I (7-36) in vivo. GLP-I (7-36) is degraded by DPP-IV efficiently to GLP-I (9-36), which has been speculated to act as a physiological antagonist to GLP-I (7-36). Inhibiting DPP-TV in vivo is therefore believed to be useful for potentiating endogenous levels of GLP-I (7-36) and attenuating the formation of its antagonist GLP-I (9-36). Thus, DPP-IV inhibitors are believed to be useful agents for the prevention, delay of progression, and/or treatment of conditions mediated by DPP-IV, in particular diabetes and more particularly, type 2 diabetes mellitus, diabetic dislipidemia, conditions of impaired glucose tolerance (IGT), conditions of impaired fasting plasma glucose (WG), metabolic acidosis, ketosis, appetite regulation and obesity.

DPP-IV expression is increased in T-cells upon mitogenic or antigenic stimulation (Mattem, T., et al., Scand. J. Immunol, 1991, 33, 737). It has been reported that inhibitors of DPP-IV and antibodies to DPP-IV suppress the proliferation of mitogen-stimulated and antigen-stimulated T-cells in a dose-dependant manner (Schon, E., et al., Biol. Chem., 1991, 372, 305). Various other functions of T-lymphocytes such as cytokine production, IL-2 mediated cell proliferation and B-cell helper activity have been shown to be dependent on DPP-IV activity (Schon, E., et al., Scand. J. Immunol, 1989, 29, 127). DPP-IV inhibitors, based on boroProline, (Flentke, G. R., et al., Proc. Nat. Acad. Set USA, 1991, 88, 1556) although unstable, were effective at inhibiting antigen-induced lymphocyte proliferation and IL-2 production in murine CD4+ T-helper cells. Such boronic acid inhibitors have been shown to have an effect in vivo in mice causing suppression of antibody production induced by immune challenge (Kubota, T. et al, Clin. Exp. Immun., 1992, 89, 192). The role of DPP-IV in regulating T lymphocyte activation may also be attributed, in part, to its cell-surface association with the transmembrane phosphatase, CD45. DPP-IV inhibitors or non-active site ligands may possibly disrupt the CD45-DPP-TV association. CD45 is known to be an integral component of the T-cell signaling apparatus. It has been reported that DPP-IV is essential for the penetration and infectivity of HTV-I and HTV-2 viruses in CD4+ T-cells (Wakselman, M., Nguyen, C, Mazaleyrat, J.-P., Callebaut, C, Krust, B., Hovanessian, A. G., Inhibition of HIV-I infection of CD 26+ but not CD 26-cells by a potent cyclopeptidic inhibitor of the DPP-IV activity of CD 26. Abstract P.44 of the 24.sup.th European Peptide Symposium 1996). Additionally, DPP-IV has been shown to associate with the enzyme adenosine deaminase (ADA) on the surface of T-cells (Kameoka, J., et al., Science, 193, 26 466). ADA deficiency causes severe combined immunodeficiency disease (SCID) in humans. This ADA-CD26 interaction may provide clues to the pathophysiology of SCID. It follows that inhibitors of DPP-TV may be useful immunosuppressants (or cytokine release suppressant drugs) for the treatment of among other things: organ transplant rejection; autoimmune diseases such as inflammatory bowel disease, multiple sclerosis and rheumatoid arthritis; and the treatment of AIDS.
It has been shown that lung endothelial cell DPP-IV is an adhesion molecule for lung-metastatic rat breast and prostate carcinoma cells (Johnson, R. C, et al., J. Cell. Biol, 1993, 121, 1423). DPP-IV is known to bind to fibronectin and some metastatic tumor cells are known to carry large amounts of fibronectin on their surface. Potent DPP-IV inhibitors may be useful as drugs to prevent metastases of, for example, breast and prostrate tumors to the lungs.
High levels of DPP-PV expression have also been found in human skin fibroblast cells from patients with psoriasis, rheumatoid arthritis (RA) and lichen planus (Raynaud, F., et al., J. Cell. Physiol, 1992, 151, 378). Therefore, DPP-TV inhibitors may be useful as agents to treat dermatological diseases such as psoriasis and lichen planus. [0011] High DPP-TV activity has been found in tissue homogenates from patients with benign prostate hypertrophy and in prostatosomes. These are prostate derived organelles important for the enhancement of sperm forward motility (Vanhoof, G., et al., EMr. /.

Clin. Chem. Clin. Biochem., 1992, 30, 333). DPP-IV inhibitors may also act to suppress sperm motility and therefore act as a male contraceptive agent. Conversely, DPP-IV inhibitors have been implicated as novel for treatment of infertility, and particularly human female infertility due to Polycystic ovary syndrome (PCOS, Stein-Leventhal syndrome) which is a condition characterized by thickening of the ovarian capsule and . formation of multiple follicular cysts. It results in infertility and amenorrhea.
DPP-IV is thought to play a role in the cleavage of various cytokines
(stimulating hematopoietic cells), growth factors and neuropeptides.
[0013] Stimulated hematopoietic cells are useful for the treatment of disorders that are characterized by a reduced number of hematopoietic cells or their precursors in vivo. Such conditions occur frequently in patients who are immunosuppressed, for example, as a consequence of chemotherapy and/or radiation therapy for cancer. It was discovered that inhibitors of dipeptidyl peptidase type PV are useful for stimulating the growth and differentiation of hematopoietic cells in the absence of exogenously added cytokines or other growth factors or stromal cells. This discovery contradicts the dogma in the field of hematopoietic cell stimulation, which provides that the addition of cytokines or cells that produce cytokines (stromal cells) is an essential element for maintaining and stimulating the growth and differentiation of hematopoietic cells in culture. (See, e.g., PCT Intl. Application No. PCT/US93/017173 published as WO 94/03055).
[0014] DPP-IV in human plasma has been shown to cleave N-terminal Tyr-Ala from growth hormone-releasing factor and cause inactivation of this hormone. Therefore, inhibitors of DPP-IV may be useful in the treatment of short stature due to growth hormone deficiency (Dwarfism) and for promoting GH-dependent tissue growth or re-growth.
DPP-IV can also cleave neuropeptides and has been shown to modulate the activity of neuroactive peptides substance P, neuropeptide Y and CLIP (Mentlein, R., Dahms, P., Grandt, D., Kruger, R., Proteolytic processing of neuropeptide Y and peptide YY by dipeptidyl peptidase IV, Regul. Pept., 49, 133, 1993; Wetzel, W., Wagner, T., Vogel, D., Demuth, H.-U., Balschun, D., Effects of the CLIP fragment ACTH 20-24 on the duration of REM sleep episodes, Neuropeptides, 31, 41, 1997). Thus DPP-IV inhibitors may also be useful agents for the regulation or normalization of neurological disorders.
Several compounds have been shown to inhibit DPP-IV. Nonetheless, a need still exists for new DPP-IV inhibitors that have advantageous potency, stability, selectivity, toxicity and/or pharmacodynamics properties. In this regard, synthetic methods are provided that can be used to make a novel class of DPP-IV inhibitors.

Trelagliptin (Zafatek) is a pharmaceutical drug used for the treatment of type 2 diabetes (diabetes mellitus).[1]Trelagliptin.jpg

Indications for Medical Use

It is a highly selective dipeptidyl peptidase (DPP-4) inhibitor that is typically used as an add on treatment when the first line treatment of metformin is not achieving the expected glycemic goals; though it has been approved for use as a first line treatment when metformin cannot be used.[1]

Biochemistry

DPP-4 inhibitors activate T-cells and are more commonly known as T-cell activation antigens (specifically CD26).[1][2] Chemically, it is a fluorinated derivative of alogliptin.

Development

Formulated as the salt trelagliptin succinate, it was approved for use in Japan in March 2015.[3] Takeda, the company that developed trelagliptin, chose to not get approval for the drug in the USA and EU.[1] The licensing rights that Takeda purchased from Furiex Pharmaceuticals for DPP-4 inhibitors included a clause specific to development of this drug in the USA and EU.[1] The clause required that all services done for phase II and phase III clinical studies in the USA and EU be purchased through Furiex.[1] Takeda chose to cease development of this drug in the USA and EU because of the high costs quoted by Furiex for these services.[1] Gliptins have been on the market since 2006 and there are 8 gliptins currently registered as drugs (worldwide).[4] Gliptins are an emerging market and are thus being developed at an increasing rate; there are currently two gliptins in advanced stages of development that are expected to be on the market in the coming year.[4]

Gliptins are thought to have cardiovascular protective abilities though the extent of these effects is still being studied.[4] They are also being studied for the ability that this class of drugs has at promoting B-cell survival.[4]

Administration and Dosing

Similar drugs in the same class as trelagliptin are administered once daily while trelagliptin is administered once weekly.[1][5] Alogliptin (Nesina) is the other major DPP-4 inhibitor on the market. It is also owned by Takeda and is administered once daily. A dosing of once per week is advantageous as a reduction in the frequency of required dosing is known to increase patient compliance.[1][2]

Zafatek is administered in the form trelagliptin succinate in a 1:1 mixture of trelagliptin and succinic acid.[6] The drug is marketed with the IUPAC name Succinic acid – 2-({6-[(3R)-3-amino-1-piperidinyl]-3-methyl-2,4-dioxo-3,4-dihydro-1(2H)-pyrimidinyl}methyl)-4-fluorobenzonitrile (1:1), has a molecular mass of 475.470143 grams/mol, and has the molecular formula | C=22 | H=26 | F=1 | N=5 | O=6 .[6][7]

SYNTHESIS …………….

 

PAPER

J. Med .Chem.,2011, 54, 510-524
Synthesis started with selective alkylation of chlorouracil 80, followed by methylation provided compound153via152.
The displacement of chloride with 3-(R)-aminopiperidine83afforded trelagliptin154..

Abstract Image

The discovery of two classes of heterocyclic dipeptidyl peptidase IV (DPP-4) inhibitors, pyrimidinones and pyrimidinediones, is described. After a single oral dose, these potent, selective, and noncovalent inhibitors provide sustained reduction of plasma DPP-4 activity and lowering of blood glucose in animal models of diabetes. Compounds 13a, 27b, and 27j were selected for development.

2-[6-(3-Aminopiperidin-1-yl)-3-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-ylmethyl]-4-fluorobenzonitrile, TFA salt (27j)

A mixture of 3-methyl-6-chlorouracil (0.6 g, 3.8 mmol), 2-bromomethyl-4-fluorobenzonitrile (0.86 g, 4 mmol), and K2CO3 (0.5 g, 4 mmol) in DMSO (10 mL) was stirred at 60 °C for 2 h. The mixture was diluted with water and extracted with EtOAc. The organics were dried over MgSO4, and the solvent was removed. The residue was purified by column chromatography to give 0.66 g of 2-(6-chloro-3-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-ylmethyl)-4-fluorobenzonitrile (60%). 1H NMR (400 MHz, CDCl3): δ 7.73 (dd, J = 7.2, 8.4 Hz, 1H), 7.26 (d, J = 4.0 Hz, 1H), 7.11−7.17 (m, 1H), 6.94 (dd, J = 2.0, 9.0 Hz, 1H), 6.034 (s, 2H), 3.39 (s, 3H). MS (ES) [M + H] calcd for C13H9ClFN3O2, 293; found 293.
2-(6-Chloro-3-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-ylmethyl)-4-fluorobenzonitrile (300 mg, 1.0 mmol), 3-(R)-aminopiperidine dihydrochloride (266 mg, 1.5 mmol), and sodium bicarbonate (500 mg, 5.4 mmol) were stirred in a sealed tube in EtOH (3 mL) at 100 °C for 2 h. The final compound (367 mg, 81% yield) was obtained as a TFA salt after HPLC purification. 1H NMR (400 MHz, CD3OD): δ 7.77−7.84 (m, 1H), 7.16−7.27 (m, 2H), 5.46 (s, 1H), 5.17−5.34 (ABq, 2H, J = 35.2, 15.6 Hz), 3.33−3.47 (m, 2H), 3.22 (s, 3H), 2.98−3.08 (m, 1H), 2.67−2.92 (m, 2H), 2.07−2.17 (m, 1H), 1.82−1.92 (m, 1H), 1.51−1.79 (m, 2H). MS (ES) [M + H] calcd for C18H20FN5O2, 357; found, 357.

PATENT

WO 2007035629

http://www.google.com/patents/WO2007035629A3?cl=en

(R)-2-((6-(3-amino-3-methylpiperidin-l-yl)-3-methyl-2,4-dioxo-3,4-dihydropyrimidin-l(2H)-yl)methyl)-4-fluorobenzonitrile (30). 2-(6-Chloro-3-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-l-ylmethyl)-4-fluoro-benzonitrile (300 mg, 1.0 mmol), (R)-3-amino-3-methyl-piperidine dihydrochloride (266 mg, 1.4 mmol) and sodium bicarbonate (500 mg, 5.4 mmol) were stirred in a sealed tube in EtOH (3 mL) at 1000C for 2 hrs. The final compound was obtained as TFA salt after HPLC purification. 1H-NMR (400 MHz, CD3OD): δ. 7.78-7.83 (m, IH), 7.14-7.26 (m, 2H), 5.47 (s, IH), 5.12-5.36 (ABq, 2H, J = 105.2, 15.6 Hz), 3.21 (s, IH), 2.72-3.15 (m, 4H), 1.75-1.95 (m, 4H), 1.39 (s, 3H). MS (ES) [m+H] calc’d for C19H22FN5O2, 372.41; found, 372.41.
Compound 34

4-Fluoro-2-methylbenzonitrile (31). A mixture of 2-bromo-5-fluorotoluene (3.5 g, 18.5 mmol) and CuCN (2 g, 22 mmol) in DMF (100 mL) was refluxed for 24 hours. The reaction was diluted with water and extracted with hexane. The organics were dried over MgSO4 and the solvent removed to give product 31 (yield 60%). 1H-NMR (400 MHz, CDCl3): δ 7.60 (dd, J=5.6, 8.8 Hz, IH), 6.93-7.06 (m, 2H), 2.55 (s, 3H).
2-Bromomethyl-4-fluorobenzonitrile (32). A mixture of 4-fluoro-2-methylbenzonitrile (2 g, 14.8 mmol), NBS (2.64 g, 15 mmol) and AIBN (100 mg) in CCl4 was refluxed under nitrogen for 2 hours. The reaction was cooled to room temperature. The solid was removed by filtration. The organic solution was concentrated to give crude product as an oil, which was used in the next step without further purification. 1H-NMR (400 MHz, CDCl3): δ 7.68 (dd, J= 5.2, 8.4 Hz, IH), 7.28 (dd, J= 2.4, 8.8 Hz, IH), 7.12 (m, IH), 4.6 (s, 2H).
Alternatively, 32 was made as follows. 4-Fluoro-2-methylbenzonitrile (1 kg) in DCE (2 L) was treated with AJJBN (122 g) and heated to 750C. A suspension of DBH (353 g) in DCE (500 mL) was added at 750C portionwise over 20 minutes. This operation was repeated 5 more times over 2.5 hours. The mixture was then stirred for one additional hour and optionally monitored for completion by, for example, measuring the amount of residual benzonitrile using HPLC. Additional AJ-BN (e.g., 12.5 g) was optionally added to move the reaction toward completion. Heating was stopped and the mixture was allowed to cool overnight. N,N-diisopropylethylamine (1.3 L) was added (at <10°C over 1.5 hours) and then diethyl phosphite (1.9 L) was added (at <20°C over 30 min). The mixture was then stirred for 30 minutes or until completion. The mixture was then washed with 1% sodium metabisulfite solution (5 L) and purified with water (5 L). The organic phase was concentrated under vacuum to afford 32 as a dark brown oil (3328 g), which was used without further purification (purity was 97% (AUC)).
2-(6-Chloro-3-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-l-ylmethyl)-4-fluoro-benzonitrile (33). A mixture of crude 3-methyl-6-chlorouracil (0.6 g, 3.8 mmol), 2-bromomethyl-4-fluorobenzonitrile (0.86 g, 4 mmol) and K2CO3 (0.5 g, 4 mmol) in DMSO (10 mL) was stirred at 6O0C for 2 hours. The reaction was diluted with water and extracted with EtOAc. The organics were dried over MgSO4 and the solvent removed. The residue was purified by column chromatography. 0.66 g of the product was obtained (yield: 60%). 1H-NMR (400 MHz, CDCl3): δ 7.73 (dd, 1=1.2, 8.4Hz, IH), 7.26 (d, J-4.0Hz, IH), 7.11-7.17 (m, IH), 6.94 (dd, J=2.0, 9.0 Hz, IH), 6.034 (s, 2H), 3.39 (s, 3H). MS (ES) [m+H] calc’d for C13H9ClFN3O2, 293.68; found 293.68.
Alternatively, 33 was made as follows. To a solution of 6-chloro-3-methyluracil (750 g) and W,iV-diisopropylethylarnine (998 mL) in NMP (3 L) was added (at <30°C over 25 min) a solution of 32 (2963 g crude material containing 1300 g of 32 in 3 L of toluene). The mixture was then heated at 6O0C for 2 hours or until completion (as determined, for example, by HPLC). Heating was then stopped and the mixture was allowed to cool overnight. Purified water (3.8 L) was added, and the resultant slurry was stirred at ambient temperature for 1 hour and at <5°C for one hour. The mixture was then filtered under vacuum and the wet cake was washed with IPA (2 X 2.25 L). The material was then dried in a vacuum oven at 40±5°C for 16 or more hours to afford 33 as a tan solid (>85% yield; purity was >99% (AUC)).
2-[6-(3-Amino-piperidin-l-yl)-3-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-l-ylmethyl]-4-fluoro-benzonitrile (34). 2-(6-Chloro-3-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-l-ylmethyl)-4-fluoro-benzonitrile (300 mg, 1.0 mmol), (R)-3-amino-piperidine dihydrochloride (266 mg, 1.5 mmol) and sodium bicarbonate (500 mg, 5.4 mmol) were stirred in a sealed tube in EtOH (3 mL) at 1000C for 2 hrs. The final compound was obtained as TFA salt after HPLC purification. 1H-NMR (400 MHz, CD3OD): δ. 7.77-7.84 (m, IH), 7.16-7.27 (m, 2H), 5.46 (s, IH), 5.17-5.34 (ABq, 2H, J = 35.2, 15.6 Hz), 3.33-3.47 (m, 2H), 3.22 (s, 3H), 2.98-3.08 (m, IH), 2.67-2.92 (m, 2H), 2.07-2.17 (m, IH), 1.82-1.92 (m, IH), 1.51-1.79 (m, 2H). MS (ES) [m+H] calc’d for C18H20FN5O2, 357.38; found, 357.38.
Alternatively, the free base of 34 was prepared as follows. A mixture of 33 (1212 g), IPA (10.8 L), (R)-3-amino-piperidine dihydrochloride (785 g), purified water (78 mL) and potassium carbonate (2.5 kg, powder, 325 mesh) was heated at 6O0C until completion (e.g., for >20 hours) as determined, for example, by HPLC. Acetonitrile (3.6 L) was then added at 6O0C and the mixture was allowed to cool to <25°C. The resultant slurry was filtered under vacuum and the filter cake was washed with acetonitrile (2 X 3.6 L). The filtrate was concentrated at 450C under vacuum (for >3 hours) to afford 2.6 kg of the free base of 34.
The HCl salt of 34 was prepared from the TFA salt as follows. The TFA salt (34) was suspended in DCM, and then washed with saturated Na2CO3. The organic layer was dried and removed in vacuo. The residue was dissolved in acetonitrile and HCl in dioxane (1.5 eq.) was added at 00C. The HCl salt was obtained after removing the solvent. 1H-NMR (400 MHz, CD3OD): δ. 7.77-7.84 (m, IH), 7.12-7.26 (m, 2H), 5.47 (s, IH), 5.21-5.32 (ABq, 2H, J = 32.0, 16.0 Hz), 3.35-3.5 (m, 2H), 3.22 (s, 3H), 3.01-3.1 (m, IH), 2.69-2.93 (m, 2H), 2.07-2.17 (m, IH), 1.83-1.93 (m, IH), 1.55-1.80 (m, 2H). MS (ES) [m+H] calc’d for C18H20FN5O2, 357.38; found, 357.38.
Alternatively, the HCl salt was prepared from the free base as follows. To a solution of free base in CH2Cl2 (12 L) was added (at <35°C over 18 minutes) 2 M hydrochloric acid (3.1 L). The slurry was stirred for 1 hour and then filtered. The wet cake was washed with CH2Cl2 (3.6 L) and then THF (4.8 L). The wet cake was then slurried in THF (4.8 L) for one hour and then filtered. The filter cake was again washed with THF (4.8 L). The material was then dried in a vacuum oven at 5O0C (with a nitrogen bleed) until a constant weight (e.g., >26 hours) to afford 34 as the HCl salt as a white solid (1423 g, >85% yield).
The succinate salt of 34 was prepared from the HCl salt as follows. To a mixture of the HCl salt of 34 (1414 g), CH2Cl2 (7 L) and purifed water (14 L) was added 50% NaOH solution (212 mL) until the pH of the mixture was >12. The biphasic mixture was stirred for 30 min and the organic layer was separated. The aqueous layer was extracted with CH2Cl2 (5.7 L) and the combined organic layers were washed with purified water (6 L). The organic layer was then passed through an in-line filter and concentrated under vacuum at 3O0C over three hours to afford the free base as an off-white solid. The free base was slurried in prefiltered THF (15 L) and prefiltered IPA (5.5 L). The mixture was then heated at 6O0C until complete dissolution of the free base was observed. A prefiltered solution of succinic acid (446 g) in THF (7 L) was added (over 23 min) while maintaining the mixture temperature at >57°C. After stirring at 6O0C for 15 min, the heat was turned off, the material was allowed to cool, and the slurry was stirred for 12 hours at 25±5°C. The material was filtered under vacuum and the wet cake was washed with prefiltered IPA (2 X 4.2 L). The material was then dried in a vacuum oven at 70±5°C (with a nitrogen bleed) for >80 hours to afford the succinate salt of 34 as a white solid (1546 g, >90% yield).
The product was also converted to a variety of corresponding acid addition salts. Specifically, the benzonitrile product (approximately 10 mg) in a solution of MeOH (1 mL) was treated with various acids (1.05 equivalents). The solutions were allowed to stand for three days open to the air. If a precipitate formed, the mixture was filtered and the salt dried. If no solid formed, the mixture was concentrated in vacuo and the residue isolated. In this way, salts of 34 were prepared from the following acids: benzoic, p-toluenesulfonic, succinic, R-(-)-Mandelic and benzenesulfonic. The succinate was found to be crystalline as determined by x-ray powder diffraction analysis.
In addition, the methanesulfonate salt was prepared as follows. A 10.5 g aliquot of the benzonitrile product was mixed with 400 mL of isopropylacetate. The slurry was heated to 75°C and filtered through #3 Whatman filter paper. The solution was heated back to 750C and a IM solution of methanesulfonic acid (30.84 mL) was added slowly over 10 minutes while stirring. The suspension was cooled to room temperature at a rate of about 20°C/hr. After 1 hr at room temperature, the solid was filtered and dried in an oven overnight to obtain the methanesulfonate salt.

PATENT

US 2008227798

http://www.google.com/patents/US20080227798

    EXAMPLES
      Example 1Preparation of 2-[6-(3-amino-piperidin-1-yl)-3-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-ylmethyl]-4-fluoro-benzonitrile succinate (Compound I)

    • Figure US20080227798A1-20080918-C00004
      Compound I may be prepared by the follow synthetic route (Scheme 1)
    • Figure US20080227798A1-20080918-C00005

A. Preparation of 4-fluoro-2-methylbenzonitrile (Compound B)

    • Figure US20080227798A1-20080918-C00006
    • Compound B was prepared by refluxing a mixture of 2-bromo-5-fluoro-toluene (Compound A) (3.5 g, 18.5 mmol) and CuCN (2 g, 22 mmol) in DMF (100 mL) for 24 hours. The reaction was diluted with water and extracted with hexane. The organics were dried over MgSO4 and the solvent removed to give product B (yield 60%). 1H-NMR (400 MHz, CDCl3): δ 7.60 (dd, J=5.6, 8.8 Hz, 1H), 6.93-7.06 (m, 2H), 2.55 (s, 3H).

B. Preparation of 2-bromomethyl-4-fluorobenzonitrile (Compound C)

    • Figure US20080227798A1-20080918-C00007
    • Compound C was prepared by refluxing a mixture of 4-fluoro-2-methylbenzonitrile (Compound B) (2 g, 14.8 mmol), N-bromosuccinimide (NBS) (2.64 g, 15 mmol) and azo-bis-isobutyronitrile (AIBN) (100 mg) in CCl4 under nitrogen for 2 hours. The reaction was cooled to room temperature. The solid was removed by filtration. The organic solution was concentrated to give the crude product the form of an oil, which was used in the next step without further purification. 1H-NMR (400 MHz, CDCl3): δ 7.68 (dd, J=5.2, 8.4 Hz, 1H), 7.28 (dd, J=2.4, 8.8 Hz, 1H), 7.12 (m, 1H), 4.6 (s, 2H).

C. Preparation of 2-(6-chloro-3-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-ylmethyl)-4-fluoro-benzonitrile (Compound D)

    • Figure US20080227798A1-20080918-C00008
    • Compound E was prepared by stirring a mixture of crude 3-methyl-6-chlorouracil D (0.6 g, 3.8 mmol), 2-bromomethyl-4-fluorobenzonitrile (0.86 g, 4 mmol) and K2CO3 (0.5 g, 4 mmol) in DMSO (10 mL) at 60° C. for 2 hours. The reaction was diluted with water and extracted with EtOAc. The organics were dried over MgSO4 and the solvent removed. The residue was purified by column chromatography. 0.66 g of the product was obtained (yield: 60%). 1H-NMR (400 MHz, CDCl3): δ 7.73 (dd, J=7.2, 8.4 Hz, 1H), 7.26 (d, J=4.0 Hz, 1H), 7.11-7.17 (m, 1H), 6.94 (dd, J=2.0, 9.0 Hz, 1H), 6.034 (s, 2H), 3.39 (s, 3H). MS (ES) [m+H] calc’d for C13H9ClFN3O2, 293.68; found 293.68.

D. Preparation of 2-(6-chloro-3-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-ylmethyl)-4-fluoro-benzonitrile (Compound F)

    • Figure US20080227798A1-20080918-C00009
    • Compound F was prepared by mixing and stirring 2-(6-chloro-3-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-ylmethyl)-4-fluoro-benzonitrile (Compound E) (300 mg, 1.0 mmol), (R)-3-amino-piperidine dihydrochloride (266 mg, 1.5 mmol) and sodium bicarbonate (500 mg, 5.4 mmol) in a sealed tube in EtOH (3 mL) at 100° C. for 2 hrs. The final compound was obtained as trifluoroacetate (TFA) salt after HPLC purification. 1H-NMR (400 MHz, CD3OD): δ. 7.77-7.84 (m, 1H), 7.16-7.27 (m, 2H), 5.46 (s, 1H), 5.17-5.34 (ABq, 2H, J=35.2, 15.6 Hz), 3.33-3.47 (m, 2H), 3.22 (s, 3H), 2.98-3.08 (m, 1H), 2.67-2.92 (m, 2H), 2.07-2.17 (m, 1H), 1.82-1.92 (m, 1H), 1.51-1.79 (m, 2H). MS (ES) [m+H] calc’d for C18H20FN5O2, 357.38; found, 357.38.

E. Preparation of Compound I: the succinic acid salt of 2-(6-Chloro-3-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-ylmethyl)-4-fluoro-benzonitrile

  • Figure US20080227798A1-20080918-C00010
  • The TFA salt prepared in the above step (Example 1, Step D) was suspended in DCM, and then washed with saturated Na2CO3. The organic layer was dried and removed in vacuo. The benzonitrile product (approximately 10 mg) was dissolved in MeOH (1 mL) and to which succinic acid in THF (1.05 equivalents) was added. The solutions were allowed to stand for three days open to the air. If a precipitate formed, the solid was collected by filtration. If no solid formed, the mixture was concentrated in vacuo, and the succinate salt was obtained after removing the solvent. 1H-NMR (400 MHz, CD3OD): δ. 7.77-7.84 (m, 1H), 7.12-7.26 (m, 2H), 5.47 (s, 1H), 5.21-5.32 (ABq, 2H, J=32.0, 16.0 Hz), 3.35-3.5 (m, 2H), 3.22 (s, 3H), 3.01-3.1 (m, 1H), 2.69-2.93 (m, 2H), 2.07-2.17 (m, 1H), 1.83-1.93 (m, 1H), 1.55-1.80 (m, 2H). MS (ES) [m+H] calc’d for C18H20FN5O2, 357.38; found, 357.38.
  • Compound I such prepared was found to be crystalline as determined by x-ray powder diffraction analysis (FIG. 1). The crystal material was designated Form A.
TABLE A
Approximate Solubilities of Compound I
Solubility
Solvent (mg/mL)a
Acetone 2
Acetonitrile (ACN) <1
Dichloromethane (DCM) <1
Dimethyl Formamide (DMF) 68
1,4-Dioxane <1
Ethanol (EtOH) 2
Ethyl Acetate (EtOAc) <1
di-Ethyl ether <1
Hexanes <1
2-Propanol (IPA) <1
Methanol (MeOH) 20
Tetrahydrofuran (THF) <1
Toluene <1
Trifluoroethanol (TFE) >200
Water (H2O) 51
ACN:H2O (85:15) 101
EtOH:H2O (95:5) 5
IPA:H2O (88:12) 11
aApproximate solubilities are calculated based on the total solvent used to give a solution; actual solubilities may be greater because of the volume of the solvent portions utilized or a slow rate of dissolution. Solubilities are reported to the nearest mg/mL.

 PATENT

WO2012118180

Reference Example 2
in the following formula 2, 2 – ((6 – ((3R) -3- amino-piperidin-1-yl) -3-methyl-2,4-dioxo-3,4-dihydropyrimidine -1 (2H ) – yl) shown in the following example of a production process of a methyl) -4-fluoro-benzonitrile succinate (4b).

[Formula 2]

str1

[In the formula 2, 2 – ((6-chloro-3-methyl-2,4-dioxo-3,4-dihydropyrimidine -1 (2H) – yl) methyl) -4-fluorobenzonitrile (2b) manufacturing process]
ethyl acetate (3.5 vol), 2- (bromomethyl) -4-fluorobenzonitrile (1b) (1 equiv, 1wt.), 6- chloro-3-methyl uracil (1.05 eq, 0.79wt), N- methylpyrrolidone (NMP;.. 3.5 times the amount), diisopropylethylamine (Hunig’s base, 2.1 eq, 1.27wt) was heated to an internal temperature of 60 ~ 70 ℃ a.
The mixture was stirred until 2-4 hours or the completion of the reaction at 60 ~ 70 ℃.
Then cooling the solution to 40 ~ 50 ℃, after stirring at least 30 minutes, 40 ~ 50 ℃ isopropanol (1.5 times) while maintaining, water (3.5 times the amount) was added, then at least one hour stirring did. The solution was cooled to 20 ~ 30 ℃, was then stirred for at least 1 hour. The solution was cooled to 0 ~ 10 ℃, was then stirred for at least 1 hour. The resulting slurry was filtered, washed with 0 ~ 10 ℃ in cold isopropanol (4.0 vol), and vacuum dried at 45 ~ 55 ℃, to give the above compound (2b).

[In the formula 2, 2 – ((6 – ((3R) -3- amino-piperidin-1-yl) -3-methyl-2,4-dioxo-3,4-dihydropyrimidine -1 (2H) – yl) methyl) -4-manufacturing process of the fluorobenzonitrile (3b)]
the above compound (2b) (1 eq, 1wt.), (R) -3- aminopiperidine dihydrochloride (1.1 eq, 0.65wt .), potassium carbonate (2.5 equivalents, 1.18wt.), isopropanol (5.0 vol), water (1.5 times) until the completion of the reaction with 65 ~ 75 ℃ (eg, 3 to 7 hours ) was allowed to react. Potassium carbonate in 65 ~ 75 ℃ (7.05 eq, 3.32wt.), Water (5.5 vol) was added, and after stirring for about 30 minutes, the phases were separated at 50 ℃ ~ 70 ℃. The organic solvent was concentrated under reduced pressure to approximately 5 times. And water (5 vol) was added to the solution and concentrated under reduced pressure to approximately 5 times. The solution was stirred for about 40 minutes at 55 ℃ ~ 75 ℃. The solution was cooled to 20 ℃ ~ 30 ℃, was then stirred for at least 1 hour. The solution was cooled to 0 ~ 10 ℃, subsequently stirred for at least 1 hour, the resulting slurry was filtered, washed with 0 ~ 10 ℃ in cold water (2.0 times the amount), 45 ~ 55 ℃ was vacuum dried to give the above compound (3b).

[In the above formula 2, the compound production step of succinate (4b) of (3b)]
Compound (3b), tetrahydrofuran (6.0 vol), isopropanol (3.0 vol), water (0. a 6-fold amount) was heated to 55 ~ 65 ℃. Tetrahydrofuran solution of succinic acid (20 ℃ ~ 30 ℃) was added and the solution was stirred for about 15 minutes and maintained at 55 ~ 65 ℃.
The solution was cooled to 20 ~ 30 ℃, the mixture was stirred for at least 1 hour. The solution was cooled to 0 ~ 10 ℃, was then stirred for at least 1 hour. After the resulting slurry filtered and washed with isopropanol (6.0 vol). The resulting wet crystals were dried at 65 ~ 75 ℃, was obtained succinate of the compound (3b) and (4b) as a white crystalline solid.

PATENT

http://www.google.com/patents/CN103030631A?cl=en

2 – ({6 -! [(3R) -3- amino-piperidin-1-yl] -3-methyl-dihydro-pyrimidin _3,4_ _2,4_ dioxo-1 (2 1) – yl} methyl) benzonitrile is an effective DPP-1V inhibitors class of drugs in recent years in Japan, the structural formula

As shown below.

 

Figure CN103030631AD00051

  Chinese Patent Application CN1926128 discloses a process for preparing 2_ ({6_ [(3R) -3- amino-piperidin-1-yl] -3-methyl-2,4-dioxo-3,4- dihydropyrimidine-1 (2 1!) – yl} methyl) benzonitrile method, as shown in Scheme I:

 

Figure CN103030631AD00061

Scheme I

In the above reaction scheme, 6-chloro-uracil and 2-bromomethyl-benzene cyanide in a mixed solvent of DMF-DMSO, in the presence of NaH and LiBr alkylation reaction to give compound 2 in a yield of 54%. Compound 2 is further alkylation reaction of compound yield 3 is 72%. The total yield of the compound 4 prepared in 20% yield is low, and the preparation of compound 4 obtained purity is not high, but also the need for further purification, such as recrystallization, column chromatography and other means in order to obtain high-purity suitable Pharmaceutically acceptable 2 – ({6 – [(3R) -3- amino-piperidin-1-yl] -3-methyl-2,4-dioxo-3,4-dihydro-pyrimidin _1 (2! 1) – yl} methyl) benzonitrile compound. Preparation still find more suitable for industrial production, a higher yield of the 2- ({6- [(3R) -3- amino-piperidin-1-yl] -3-methyl-2,4-dioxo -3, (2Η) 4- dihydropyrimidine-1 – yl} methyl) benzonitrile or a salt or the like.

 

 PATENT

WO 2015137496

Example 15
(R) -2 – ((6 (3-amino-piperidin-1-yl) -3-methyl-2,4-dioxo-3,4-dihydropyrimidine -1 (2H) – yl) methyl) synthesis of 4-fluoro-benzonitrile

str1

100mL four-necked flask of water and isopropanol 1/1 (v / v) mixture 60mL was added, pyridine 21.4μL [d = 0.98, mw.79.10, 0.26mmol], (R) -1- (3- (2 – cyano-5-fluoro-benzyl) -1-methyl-2,6-dioxo-1,2,3,6-tetra-hydro-4-yl) piperidin-3-carboxamide 2.00g [mw.385.39, 5.19mmol] of It was added to the order. Then, iodobenzene diacetate 1.84g [mw.322.10, 5.71mmol] was added, and the mixture was stirred for 3 h at 20 ℃. After volatile components were distilled off under reduced pressure by an evaporator, and the aqueous solution was washed twice with ethyl acetate 20mL. After cooling to near 0 ℃, potassium carbonate 16g added stepwise at 15 ℃ or less, was extracted by the addition of toluene 6mL and isopropanol 6mL. After separation, the organic layer was washed with saturated brine 10mL, adding toluene 6mL after concentration under reduced pressure by an evaporator, and further subjected to vacuum concentration. It was suspended by the addition of toluene 6mL to concentrate, by the addition of n-heptane 6mL, after 1 hour and aged at 0 ℃, reduced pressure filtration, to obtain the desired compound after drying under reduced pressure at 50 ℃. White crystalline powder, 1.6g, 86% yield.

1 H-NMR (500 MHz, CDCl 3 ) delta (ppm) 1.23 (D, J = 11.03 Hz, 1H) 1.30 (BRS, 2H) 1.56-1.67 (M, 1H) 1.72-1.83 (M, 1H) 1.95 (dd , J = 12.77 Hz, 3.94 Hz, 1H) 2.41 (m, 1H) 2.61 (m, 1H) 2.87-2.98 (m, 2H) 2.99-3.05 (m, 1H) 3.32 (s, 3H) 5.23-5.32 (m , 2H) 5.39 (s, 1H) 6.86 (dd, J = 8.99 Hz, 2.36 Hz, 1H) 7.09 (td, J = 8.04 Hz, 2.52 Hz, 1H) 7.69 (dd, J = 8.51 Hz, 5.36 Hz, 1H ).

13 C NMR (126 MHz, CDCl 3 ) ppm 28.0, 33.4, 46.1, 51.9, 59.7, 90.8, 114.6,114.7, 115.6, 115.8, 116.4, 135.4, 135.5, 144.6, 152.7, 159.5, 162.9.
Reference Example 4
(R) -2 – ((6 (3-amino-piperidin-1-yl) -3-methyl-2,4-dioxo-3,4-dihydropyrimidine -1 (2H) – yl) methyl) synthesis of 4-fluoro-benzonitrile succinate
str1
50mL eggplant-shaped flask (R) -2 – ((6- (3- amino-1-yl) -3-methyl-2,4-dioxo-3,4-dihydro-pyrimidine -1 (2H) – yl) methyl) -4-fluorobenzonitrile 1.0g [mw.357.38, 2.8mmol], it was added tetrahydrofuran 4.5mL and water 2 drops. After heated and dissolved at 65 ℃, was dropped to the solution was dissolved at the same temperature 0.331g succinic acid [mw.118.09, 2.8mmol] with tetrahydrofuran 4mL and isopropanol 2.5mL. Aged for 16 hours at room temperature after stirring for 30 min at 65 ℃, and stirred for a further 2 hours at 0 ℃. The crystallization product was collected by terrorism to vacuum filtration. To obtain the desired compound after drying under reduced pressure at 45 ℃. White crystalline powder, 1.2g, 93% yield.

1 H-NMR (500 MHz, DMSO) delta (ppm) 1.35 (D, J = 8.83 Hz, 1H) 1.42-1.57 (M, 1H) 1.66-1.97 (M, 2H) 2.54-2.77 (M, 2H) 2.91 ( d, J = 11.35 Hz, 1H) 3.00-3.07 (m, 1H) 3.08 (m, 1H) 3.09 (s, 3H) 3.14 (m, 1H) 5.12 (d, J = 16.08 Hz, 1H) 5.20 (d, J = 16.39 Hz, 1H) 5.38 (s, 1H) 7.17 (dd, J = 9.62 Hz, 2.36 Hz, 1H) 7.35 (td, J = 8.51 Hz, 2.52 Hz, 1H) 7.95 (dd, J = 8.67 Hz, 5.52 Hz, 1H).

13 C NMR (126 MHz, DMSO) delta ppm 27.9, 31.6, 46.3, 47.0, 51.7, 55.8, 90.3, 106.9, 115.7, 117.1, 136.45, 136.53, 145.8, 152.3, 159.7, 162.7, 164.1 , 166.1, 175.2.

 

PATENT

http://www.google.com/patents/CN102964196A?cl=en

PATENT

WO 2016024224,

New Patent, Trelagliptin, SUN PHARMA

SUN PHARMACEUTICAL INDUSTRIES LIMITED [IN/IN]; Sun House, Plot No. 201 B/1 Western Express Highway Goregaon (E) Mumbai, Maharashtra 400 063 (IN)

BARMAN, Dhiren, Chandra; (IN).
NATH, Asok; (IN).
PRASAD, Mohan; (IN)

The present invention provides a process for the preparation of 4-fluoro-2- methylbenzonitrile of Formula (II), and its use for the preparation of trelagliptin or its salts. The present invention provides an efficient, simple, and commercially friendly process for the preparation of 4-fluoro-2-methylbenzonitrile, which is used as an intermediate for the preparation of trelagliptin or its salts. The present invention avoids the use of toxic and hazardous reagents, high boiling solvents, and bromo intermediates such as 2-bromo-5-fluorotoluene, which is lachrymatory in nature and thus difficult to handle at a commercial scale.

front page image

Trelagliptin is a dipeptidyl peptidase IV (DPP-IV) inhibitor, chemically designated as 2- [[6-[(3i?)-3 -aminopiperidin- 1 -yl] -3 -methyl -2,4-dioxopyrimidin- 1 -yljmethyl] -4-fluorobenzonitrile, represented by Formula I.

Formula I

Trelagliptin is administered as a succinate salt of Formula la, chemically designated as 2-[[6-[(3i?)-3-aminopiperidin-l-yl]-3-methyl-2,4-dioxopyrimidin-l-yl]methyl]-4-fluorobenzonitrile butanedioic acid (1 : 1).

Formula la

U.S. Patent Nos. 7,795,428, 8,288,539, and 8,222,411 provide a process for the preparation of 4-fluoro-2-methylbenzonitrile by reacting 2-bromo-5-fluorotoluene with copper (I) cyanide in N,N-dimethylformamide.

Chinese Patent No. CN 102964196 provides a process for the preparation of 4-fluoro-2-methylbenzonitrile by reacting 4-fluoro-2-methylbenzyl alcohol with cuprous iodide in the presence of 2,2′-bipyridine and 2,2,6,6-tetramethylpiperidine oxide (TEMPO) in an anhydrous ethanol.

Copper (I) cyanide is toxic to humans, and therefore its use in the manufacture of a drug substance is not advisable. In addition, 2-bromo-5-fluorotoluene is converted to 4-fluoro-2-methylbenzonitrile by refluxing in N,N-dimethylformamide at 152°C to 155°C for 24 hours. This leads to some charring, resulting in a tedious work-up process and low yield. Furthermore, the use of reagents like cuprous iodide, 2,2′-bipyridine, and 2,2,6,6-tetramethylpiperidine oxide (TEMPO) is hazardous and/or environmentally-unfriendly, and therefore their use in the manufacture of a drug substance is not desirable.

The present invention provides an efficient, simple, and commercially friendly process for the preparation of 4-fluoro-2-methylbenzonitrile, which is used as an intermediate for the preparation of trelagliptin or its salts. The present invention avoids the use of toxic and hazardous reagents, high boiling solvents, and bromo intermediates such as 2-bromo-5-fluorotoluene, which is lachrymatory in nature and thus difficult to handle at a commercial scale.

EXAMPLES

Example 1 : Preparation of 4-fluoro-2-methylbenzaldoxime

4-Fluoro-2-methylbenzaldehyde (1.38 g) was added to ethanol (10 mL) to obtain a solution. To this solution, hydroxylamine hydrochloride (2.76 g) and pyridine (1 mL) were added, and then the mixture was stirred at 20°C to 25 °C for 3 hours. The solvent was recovered up to maximum extent from the reaction mixture under reduced pressure to afford the title compound. Yield: 3.1 g

Example 2: Preparation of 4-fluoro-2-methylbenzaldoxime

4-Fluoro-2-methylbenzaldehyde (5 g) was added to ethanol (37 mL) to obtain a solution. To this solution, hydroxylamine hydrochloride (10 g) and N,N-diisopropylethylamine (3.6 mL) were added, and then the mixture was stirred at 20°C to 25 °C for 2 hours. The solvent was recovered up to maximum extent from the reaction mixture under reduced pressure to afford the title compound. Yield: 3.1 g

Example 3 : Preparation of 4-fluoro-2-methylbenzaldoxime

4-Fluoro-2-methylbenzaldehyde (10 g) was added to ethanol (40 mL) to obtain a solution. To this solution, hydroxylamine hydrochloride (20 g) and N,N-diisopropylethylamine (7.5 mL) were added, and then the mixture was stirred at 20°C to 25 °C for 4 hours. The solvent was recovered from the reaction mixture under reduced pressure to afford the title compound. Yield: 11.0 g

Example 4: Preparation of 4-fluoro-2-methylbenzaldoxime

4-Fluoro-2-methylbenzaldehyde (50 g) was added to ethanol (500 mL) to obtain a solution. To this solution, hydroxylamine hydrochloride (70 g) and N,N-diisopropylethylamine (36 mL) were added, and then the mixture was stirred at 20°C to 25 °C for 6 hours. The solvent was recovered from the reaction mixture under reduced pressure to afford the title compound. Yield: 51.0 g

Example 5 : Preparation of 4-fluoro-2-methylbenzaldoxime

4-Fluoro-2-methylbenzaldehyde (20 g) was added to ethanol (200 mL) to obtain a solution. To this solution, hydroxylamine hydrochloride (20 g) and N,N-diisopropylethylamine (18 mL) were added, and then the mixture was stirred at 20°C to 25 °C for 4 hours. The solvent was recovered from the reaction mixture under reduced pressure to obtain a residue. Deionized water (60 mL) was charged into the residue, and then the slurry was stirred at 0°C to 5°C for 1 hour. The solid obtained was filtered, then washed with deionized water (2 x 20 mL). The wet solid was dried in an air oven at 40°C to 45 °C for 4 hours to 5 hours. The crude product obtained was recrystallized in ethanol (50 mL) to afford the pure title compound. Yield: 21.0 g

Example 6: Preparation of 4-fluoro-2-methylbenzaldoxime

4-Fluoro-2-methyl benzaldehyde (50 g) was added to ethanol (500 mL) to obtain a solution. To this solution, hydroxylamine hydrochloride (50 g) and N,N-diisopropylethylamine (46.4 mL) were added, and then the mixture was stirred at 20°C to 25 °C for 4 hours. The solvent was recovered from the reaction mixture under reduced pressure to obtain a residue. Deionized water (150 mL) was charged to the residue, and then the slurry was stirred at 0°C to 5°C for 1 hour. The solid obtained was filtered, then washed with deionized water (2 x 50 mL). The wet solid was dried in an air oven at 40°C to 45 °C for 4 hours to 5 hours. The crude product obtained was recrystallized in ethanol (200 mL) to afford the pure title compound. Yield: 53.5 g

Example 7: Preparation of 4-fluoro-2-methylbenzonitrile

4-Fluoro-2-methylbenzaldoxime (3.1 g) and phosphorous pentoxide (1 g) were added to toluene (30 mL) to obtain a reaction mixture. The reaction mixture was refluxed at 110°C to 115°C for 24 hours. After completion of the reaction (monitored by TLC), the reaction mixture was cooled to 25°C to 30°C. Deionized water (30 mL) was added to the mixture and then the layers were separated. The organic layer was concentrated under reduced pressure to afford the title compound. Yield: 1.1 g

Example 8: Preparation of 4-fluoro-2-methylbenzonitrile

4-Fluoro-2-methylbenzaldoxime (3 g) and phosphorous pentoxide (2 g) were added to toluene (30 mL) to obtain a reaction mixture. The reaction mixture was refluxed at 110°C to 115°C for 24 hours. After completion of the reaction (monitored by TLC), the reaction mixture was cooled to 25°C to 30°C. Deionized water (30 mL) was added to the mixture and then the layers were separated. The organic layer was concentrated under reduced pressure to afford the title compound. Yield: 1.0 g

Example 9: Preparation of 4-fluoro-2-methylbenzonitrile

4-Fluoro-2-methylbenzaldoxime (5 g) and concentrated sulphuric acid (2 mL) were added to toluene (100 mL) to obtain a reaction mixture. The reaction mixture was refluxed at 110°C to 115°C for 5 hours. After completion of the reaction (monitored by TLC), the reaction mixture was cooled to 25°C to 30°C. Deionized water (50 mL) was added to the mixture and then the layers were separated. The organic layer was concentrated under reduced pressure to afford the title compound. Yield: 3.24 g

Example 10: Preparation of 4-fluoro-2-methylbenzonitrile

4-Fluoro-2-methylbenzaldoxime (25 g) and concentrated sulphuric acid (35 g) were added to toluene (500 mL) to obtain a reaction mixture. The reaction mixture was refluxed at 110°C to 115°C for 6 hours. After completion of the reaction (monitored by TLC), the reaction mixture was cooled to 25°C to 30°C. Deionized water (250 mL) was added to the mixture and then the layers were separated. The organic layer was concentrated under reduced pressure to afford the title compound. Yield: 20.5 g

Example 11 : Preparation of 4-fluoro-2-methylbenzonitrile

4-Fluoro-2-methyl benzaldoxime (5 g) and sodium bisulphate monohydrate (3.1 g) were added to toluene (50 mL) to obtain a reaction mixture. The reaction mixture was refluxed at 110°C to 115°C for 12 hours. After completion of the reaction (monitored by TLC), the reaction mixture was cooled to 25°C to 30°C, then filtered, and then washed with toluene (10 mL). The filtrate was concentrated under reduced pressure to afford the title compound. Yield: 3.0 g

Example 12: Preparation of 4-fluoro-2-methylbenzonitrile

4-Fluoro-2-methyl benzaldoxime (50 g) and sodium bisulphate monohydrate (31.6 g) were added to toluene (500 mL) to obtain a reaction mixture. The reaction mixture was refluxed at 110°C to 115°C using a Dean-Stark apparatus for 12 hours. After completion of the reaction (monitored by TLC), the reaction mixture was cooled to 25 °C to 30°C, then filtered, and then washed with toluene (100 mL). The filtrate was concentrated under reduced pressure to afford a crude product. The crude product obtained was recrystallized in a mixture of toluene (200 mL) and hexane (500 mL) to afford the title compound.

Yield: 38.0 g

Sun Pharma managing director Dilip Shanghvi.

References

http://www.cbijournal.com/paper-archive/may-june-2014-vol-3/Review-Paper-1.pdf

 

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Trelagliptin
Trelagliptin.svg
Systematic (IUPAC) name
Succinic acid – 2-({6-[(3R)-3-amino-1-piperidinyl]-3-methyl-2,4-dioxo-3,4-dihydro-1(2H)-pyrimidinyl}methyl)-4-fluorobenzonitrile (1:1)
Clinical data
Trade names Zafatek
Chemical data
Formula C22H26FN5O6
Molar mass 475.470143 g/mol

/////////Trelagliptin, PMDA, JAPAN 2015

Cn1c(=O)cc(n(c1=O)Cc2cc(ccc2C#N)F)N3CCC[C@H](C3)N

CN1C(=O)C=C(N(C1=O)CC2=C(C=CC(=C2)F)C#N)N3CCCC(C3)N

Acotiamide


Acotiamide.png

 

 

img

Acotiamide hydrochloride trihydrate
CAS#: 773092-05-0 (Acotiamide HCl hydrate, 1:1:3); 185104-11-4(Acotiamide HCl, 1:1); 185106-16-5 (Acotiamide free base)
Chemical Formula: C21H37ClN4O8S

Molecular Weight: 541.06
Elemental Analysis: C, 46.62; H, 6.89; Cl, 6.55; N, 10.36; O, 23.66; S, 5.93

Acotiamide, also known as YM-443 and Z-338, is a drug approved in Japan for the treatment of postprandial fullness, upper abdominal bloating, and early satiation due to functional dyspepsia. It acts as an acetylcholinesterase inhibitor. Note: The Approved drug API is a cotiamide HCl trihydrate (1:1:3)

N-(2-(diisopropylamino)ethyl)-2-(2-hydroxy-4,5-dimethoxybenzamido)thiazole-4-carboxamide hydrochloride trihydrate.

YM443; YM-443; YM 443; Z338; Z-338; Z 338; Acotiamide; Acotiamide hydrochloride trihydrate; Brand name: Acofide.

A peripheral acetylcholinesterase (AChE) inhibitor used to treat functional dyspepsia.

Acotiamide (YM-443, Z-338) is a drug approved in Japan for the treatment of postprandial fullness, upper abdominal bloating, and early satiation due to functional dyspepsia.[1] It acts as an acetylcholinesterase inhibitor.

Acotiamide hydrochloride (acotiamide; N-[2-[bis(1-methylethyl) amino]ethyl]-2-[(2-hydroxy-4,5-dimethoxybenzoyl) amino] thiazole-4-carboxamide monohydrochloride trihydrate, Z-338) has been reported to improve meal-related symptoms of functional dyspepsia in clinical studies.

Acotiamide (Acofide(®)), an oral first-in-class prokinetic drug, is under global development by Zeria Pharmaceutical Co. Ltd and Astellas Pharma Inc. for the treatment of patients with functional dyspepsia. The drug modulates upper gastrointestinal motility to alleviate abdominal symptoms resulting from hypomotility and delayed gastric emptying. It exerts its activity in the stomach via muscarinic receptor inhibition, resulting in enhanced acetylcholine release and inhibition of acetylcholinesterase activity. Unlike other prokinetic drugs that are utilized in the management of functional dyspepsia, acotiamide shows little/no affinity for serotonin or dopamine D2 receptors. Acotiamide is the world’s first approved treatment for functional dyspepsia diagnosed by Rome III criteria, with its first approval occurring in Japan. Phase III trials in this patient population are in preparation in Europe, with phase II trials completed in the USA and Europe.

 

STR1

SYNTHESIS

 

 

EP 0870765; US 5981557; WO 9636619

Acylation of 2-aminothiazole-4-carboxylic acid ethyl ester (I) with 2,4,5-trimethoxybenzoyl chloride (II) produced the corresponding amide (III). The 2-methoxy group of (III) was then selectively cleaved by treatment with pyridine hydrochloride, yielding the 2-hydroxybenzamide (IV). Finally, displacement of the ethyl ester group of (IV) by N,N-diisopropyl ethanediamine (V) upon heating at 120 C furnished the target compound, which was isolated as the corresponding hydrochloride salt.

 

 

EP 0994108; WO 9858918

In a closely related procedure, acid chloride (II), prepared by treatment of 2,4,5-trimethoxybenzoic acid (VI) with SOCl2 in hot toluene, was condensed with aminothiazole (I), yielding amide (III). Displacement of the ethyl ester group of (III) by N,N-diisopropyl ethanediamine (V) furnished diamide (VII). Finally, upon formation of the hydrochloride salt of (VII) in isopropanol, the 2-methoxy group was simultaneously cleaved, directly leading to the title compound.

 

CN103709191A

Acotiamide hydrochloride, chemical name: N_ [2_ (diisopropylamino) ethyl] -2- [(2-hydroxy-4,5-dimethoxybenzoyl) amino ] thiazole-4-carboxamide hydrochloride, the following structure:

Figure CN103709191AD00041

  A test for the amine hydrochloride Japan Zeria Pharmaceutical Company and Astellas jointly developed acetylcholinesterase inhibitor class of prokinetic drugs, namely the treatment of functional dyspepsia drugs, is the world’s first approved specifically for the treatment of FD drugs, in June 2013 for the first time launched in Japan, under the trade name Acofide. Functional dyspepsia (Functional dyspepsia, FD) is a group of common symptoms include bloating, early satiety, burning sensation, belching, nausea, vomiting and abdominal discomfort and so difficult to describe, and no exact organic disease. Organic diseases because of lack of basic, functional dyspepsia harm to patients focus on the performance of gastrointestinal symptoms caused discomfort and possible impact on the quality of life in. Because some patients with functional dyspepsia symptoms caused by eating less, digestion and absorption efficiency is reduced, resulting in varying degrees of malnutrition (including nutrients are not full). With the people’s demands and improve the quality of life for functional dyspepsia know, the number of visits of the disease gradually increased, to become one of the most common disease of Gastroenterology partner waiting group. Such a high prevalence of functional dyspepsia treatment provides a huge market.

  The present synthesis method has been reported in less divided into four methods are described below:

  1, reference CN1084739C, synthetic route as shown below. Disadvantage of this patent is that: (I) using thionyl chloride and dichloroethane toxic, environmentally damaging substances; (2) demethylation low yield (64.6% to 86 reported in the literature %). Examples reported in this patent first and second step total yield was 84.6% and the total yield of the third-step reaction and recrystallization of 61%, the total yield of 51.6%.

Figure CN103709191AD00051

  The method, reported in the patent CN1063442C preparation A (page 25) reports (without reference to examples I and 6, referring to its general method). Patent CN102030654B (page 3) above: Step demethylation reaction generates a lot of by-products, it is difficult to take off only a selective protection of hydroxy groups, poor selectivity. Specific synthetic examples are shown below:

Figure CN103709191AD00052

  Preparation Method B 3 mentioned patent CN1063442C (prepared unprotected, p. 25), where the yield is very low two-step reaction. A test method for the preparation of amines referenced above example (Example 38) A test for specific preparation yield amine not mentioned in the text, but if you use the above method starting materials primary amino side reactions occur. Synthesis of solid concrete

Following is an example:

Figure CN103709191AD00061

reported that patent CN101006040B in Method 4. The first step demethylation can also use titanium tetrachloride and aluminum chloride; the second reaction can also be used phenol / thionyl chloride. Synthetic route are higher yield and purity (total yield 73%).

Figure CN103709191AD00062

  The method of synthesis of the above methods 3 patent CN1063442C reported, though not suitable for the synthesis of amine A test, but may be modified on this basis.

the above patents, CN1084739 reagents using dichloroethane, toxic, environmentally destructive, and the total yield is low, is not conducive to industrial production; patent CN102030654B mentioned Step demethylation The reaction produces a lot of by-products, it is difficult to take off only selective hydroxy protecting group, the reaction selectivity, more side effects.

Figure CN103709191AD00071

Example 4

[Amino-N- (2- tert-butoxycarbonyl group -4,5_ dimethoxybenzoyl)] _4_ Preparation of 2-methoxycarbonyl-1,3-thiazole: [0062] Step 1

  2-hydroxy-4,5-dimethoxy-benzoic acid (100 g) was dissolved in dry toluene (400 ml) was added Boc20 (132 g) was stirred at rt for 3 hours at room temperature, was added a 10% aqueous citric acid (100 ml) and washed three times with purified water until neutral, dried over anhydrous sodium sulfate was added (20 g) and dried 8 hours, filtered, and the filtrate was added thionyl chloride (64 g) and N, N-dimethyl- carboxamide (0.19 ml), followed by stirring 80 ° C for 4 hours, the compound was added 2-amino-4-methoxycarbonyl-1,3-thiazole (85 g), stirred for 5 hours at 100 ° C, the reaction was completed After cooling to room temperature, the precipitated crystals were collected by filtration, crystals were added to 1.6 liters of water, 400 g of ice was added with stirring, and added a mass ratio of 10% sodium hydroxide aqueous solution adjusted to pH 7.5, followed by stirring for 3 hours at room temperature, filtered The crystals were collected, washed with water, 60 ° C and dried to give the title compound (170 g).

Hl-NMR (DMSO, 400MHz) δ: 1.34 (s, 3H), 1.37 (s, 3H), 1.40 (s, 3H), 3.77 (s, 3H),

3.82 (s, 3H), 3.88 (s, 3H), 7.17 (s, 1H), 7.50 (s, 1H), 7.95 (s, 1H), 11.45 (bs, 1H).

Step 2: 2- [N- (2- hydroxy-4,5-dimethoxybenzoyl) amino] -4- [(2_ diisopropylamino ethyl) – aminocarbonyl] -1 , Preparation of 3-thiazole hydrochloride

The 2- [N- (2- tert-butoxycarbonyl group -4,5_ dimethoxybenzoyl) amino] _4_ methoxycarbonyl _1,3_ thiazole prepared (170 g) and N , N- diisopropyl-ethylenediamine (162 ml), N, N- dimethylacetamide (162 ml) was stirred at 135 ° C for 8 hours and cooled, 1-butanol (1.7 liters), with 0.5N aqueous sodium hydroxide solution and washed with saturated brine, the mixture was concentrated under reduced pressure, methanol (1.7 l), hydrogen chloride gas under cooling and stirred for 5 hours, the precipitate was collected by filtration, the crystals were washed with 2-propanol and water do recrystallized from a mixed solvent, to give the title compound. Melting point: 160 ° C.

[0067] Hl- bandit R (DMSO, 400ΜΗζ) δ: 1.33 (d, J = 6.4Hz, 6H); 1.36 (d, J = 6.4,6H), 3.17-3.20 (m, 2H); 3.57-3.69 ( m, 4H), 3.77 (s, 3H), 3.82 (s, 3H), 6.89 (s, 1H), 7.50 (s, 1H), 7.91 (s, 1H); 8

• 74 (t, 1H, J = 5.9Hz); 9.70 (s, 1H); 11.80 (s, 1H); 12.05-12.15 (bs, 1H).

 

CN 104045606

http://google.com/patents/CN104045606B?cl=en

Example 1: A test preparation for the amine hydrochloride

  In 500ml reaction flask was added 2,4, 5- trimethoxy benzoic acid (20 g, 94. 3mmol), 200 ml N, N- dimethylformamide. Was added TBTU (30.88 g, 113.2mmol), jealous% was added diisopropylethylamine (14.59g, 113. 2mmol), stirred at room temperature for 2 hours. Was added 2-aminothiazol 4-carboxylic acid methyl ester setback (14. 92 g, 94. 3mmol), DMAP (2. 30g, 18. 9mmol), was heated to 75 ° C, stirred for 24 hours. Added% Jealous diisopropylethylenediamine (27. 16g, 188. 6mmol), and heated to 140 ° C, stirred for 10 hours. After cooling, 400ml of n-butanol was added, stirred, allowed to stand for stratification. Take the upper, washed with saturated brine, 400ml, standing stratification. Take the upper, lower temperatures hydrogen chloride isopropanol solution of 120ml, precipitated solids. Vacuum filter cake into the oven blast 60 ° C and dried for 1 hour. A test was for amine hydrochloride (Compound V) 28. 5g, HPLC purity 99%, yield 62%.

1HNMR (400 MHz, dmso) 8 12.10 (s, 1H), 11.77 (s, 1H), 9.74 (s, 1H), 8.72 (t, / = 5.8 Hz, 1H), 7.88 (s, 1H) , 7.48 (s, 1H), 6.89 (s, 1H), 3.80 (s, 3H), 3.76 (s, 3H), 3.62 (d, / = 6.6 Hz, 4H), 3.16 (d, / = 6.4 Hz, 2H), 1.32 (dd, / = 13. 4,6. 3 Hz, 12H).

2 Example: A test preparation for the amine hydrochloride

added 2, 4, 5- trimethoxy benzoic acid (20g, 94. 3mmol) in 500ml reaction flask, 200ml% Jealous dimethylacetamide. Was added TBTU (30.88g, 113. 2mmol), was added diisopropylethylamine jealous% (14. 59g, 113. 2mmol)), followed by stirring at room temperature for 2 hours. Was added 2-aminothiazol-4-carboxylate (14. 92g, 94. 3mmol), DMAP (2. 3g, 18. 9mmol), was heated to 75 ° C, stirred for 24 hours. Added% Jealous diisopropylethylenediamine (27. 16g, 188. 6mmol), and heated to 140 ° C, stirred for 10 hours. After cooling, 400ml of n-butanol was added, stirred, allowed to stand for stratification. Take the upper, washed with saturated brine, 400ml, standing stratification. Take the upper, lower temperatures hydrogen chloride isopropanol solution of 120ml, precipitate a solid, vacuum filtration, cake into the oven blast 60 ° C and dried for 1 hour. A test was for amine hydrochloride (Compound V) 31. 7 g, HPLC purity 99%, yield 69%.

 

 

CN103387552A

A test for the amine hydrochloride (Z-338) is a new Ml Japan Zeria company’s original research, M2 receptor antagonist, for the treatment of functional dyspepsia clinic.

Chinese patent application describes doxorubicin hydrochloride CN200580028537 test for amines (Z-338) preparation, reaction

Process is as follows.

Figure CN103387552AD00031

A test for the amine hydrochloride (z-338) Compound Patent Application (CN96194002.6) choosing 2,4,5-trimethoxy benzoic acid as a starting material first with 2-aminothiazol-4-carboxylate reacts 2- [(2-hydroxy-4,5-dimethoxybenzoyl) amino] -1,3-thiazole-4-carboxylate, 2-methyl-benzene and then removed, the yield of this method lower demethylation selectivity bad. So choose the first 2-methyl-removal before subsequent reaction better.

The first patent application CN200580028537 2_ hydroxyl _4,5_ dimethoxy benzoic acid and triphenyl phosphite placed in toluene, was added a few drops of concentrated sulfuric acid as a catalyst under reflux to give the intermediate 2-hydroxy – 4,5-dimethoxy-phenyl benzoate. After the above intermediate with 2-aminothiazol-4-carboxylate in place of toluene, was added triphenyl borate reacted, treated to give 2- [(2-hydroxy-4,5-dimethoxy- benzoyl) amino] -1,3-thiazole-4-carboxylate, and finally with N, N- diisopropylethylamine in toluene diamine salt in the system after the reaction.

 Figure CN103387552AD00041

Example 1

  2 – [(2-hydroxy-4,5-dimethoxybenzoyl) amino] thiazole Synthesis _1,3_ _4_ carboxylate

[0030] triphosgene dissolved in 90ml CH2Cl2 19.0g placed in a four-necked flask, under N2 stream, the 2_ hydroxyl _4,5_ dimethoxy benzoic acid (22.2g) was dissolved in 150ml CH2Cl2 and 45ml pyridine, at four-necked flask temperature dropped 0_5 ° C under ice-salt bath. Dropping finished within 45min, kept cold stirred lOmin. After warm to room temperature (20 ° C) was stirred for 50min, the reaction was stopped. Pressure filtration, and the filtrate by rotary evaporation at room temperature to a constant weight, adding 35g 2- aminothiazol-4-carboxylate and 240ml 1,2_ dichloroethane and heated to reflux, the reaction 6h. After stopping the cooling, suction filtration, washed with methanol and the resulting solid was refluxed in 40ml, hot filtration to give a white solid 32.18g, yield 85%. M + Na + 361; 2M + Na + 699. [0031] Example 2

2 – [(2-hydroxy-4,5-dimethoxybenzoyl) amino] thiazole Synthesis _1,3_ _4_ carboxylate

triphosgene dissolved in 15ml CH2Cl2 placed 3.0g four-necked flask, under N2 stream, the 2_ hydroxyl _4,5_ dimethoxy benzoic acid (3.0g) was dissolved in pyridine 30ml CH2Cl2 and 61,111, in four-necked flask temperature dropped 0_5 ° C under ice-salt bath. 20min Upon completion, kept cold stirring lh. After warm to room temperature (20 ° C) and stirred overnight, 24h after stopping the reaction. Rotary evaporation at room temperature to a constant weight is added 3.5g 2- aminothiazol-4-carboxylate and 30ml 1,2- dichloroethane burning, heated to reflux, the reaction 6h. The solvent was evaporated after stopping, add 30ml methanol reflux filtration to give a white solid 4.1g, 20ml methanol was added to the mother liquor evaporated leaching and washing a white solid 0.85g. After the merger was solid 4.95g, yield 97%.

Example 3

  2 – [(2-hydroxy-4,5-dimethoxybenzoyl) amino] thiazole Synthesis _1,3_ _4_ carboxylate

The diphosgene 3.0g was dissolved into 15ml CH2Cl2 four-necked flask, under N2 stream, the 2_ hydroxyl _4,5_ dimethoxy benzoic acid (3.0g) was dissolved in 30ml CH2Cl2 and 61,111 pyridine, Under ice-salt bath temperature dropped a four-necked flask 0_5 ° C. 20min Upon completion, kept cold stirring lh. After warm to room temperature (20 ° C) and stirred overnight, 24h after stopping the reaction. Rotary evaporation at room temperature to a constant weight is added 3.5g 2- aminothiazol-4-carboxylate and 30ml 1,2- dichloroethane burning, heated to reflux, the reaction 6h. After the solvent was evaporated and stopped by adding 30ml of methanol was refluxed for leaching to give a white solid 4.57g, yield 89.6%.

  Example 4

  2 – [(2-hydroxy-4,5-dimethoxybenzoyl) amino] thiazole Synthesis _1,3_ _4_ carboxylate

  triphosgene dissolved in 15ml CH2Cl2 placed 3.0g four-necked flask, under N2 stream, the 2_ hydroxyl _4,5_ dimethoxy benzoic acid (3.0g) `pyridine was dissolved in 30ml CH2Cl2 and 61 111, Under ice-salt bath temperature dropped a four-necked flask 0_5 ° C. 20min Upon completion, kept cold stirring lh. After warm to room temperature (20 ° C) and stirred overnight, 24h after stopping the reaction. Rotary evaporation at room temperature to a constant weight is added 3.7g 2- aminothiazol-4-carboxylic acid ethyl ester and 30ml 1,2- dichloroethane burning, heated to reflux, the reaction 6h. The solvent was evaporated after stopping, add 30ml methanol reflux filtration to give a white solid 3.8g, 20ml methanol was added to the mother liquor evaporated leaching and washing a white solid 0.54g. After the merger was solid 4.34g, yield 81.4%. M + Na + 375.

Example 5

  N- [2_ (diisopropylamino) ethyl] -2 – [(hydroxy -4,5_ 2_ dimethoxybenzoyl) amino] -1,3-thiazol-4-carboxamide amide hydrochloride

  2 – [(2-hydroxy-4,5-dimethoxybenzoyl) amino] thiazole _4_ _1,3_ carboxylate and 1.5g IOml 1,4- dioxane placed in a four-necked flask, N2 gas shielded at 75 ° C was added dropwise 1.5ml N, N- diisopropyl-ethylenediamine, rose after reflux, the reaction was stirred for 6 hours. The reaction was stopped, the solvent was evaporated to dryness under reduced pressure, 30ml CH2Cl2 was added dissolved in 20ml10% NaCl solution was washed twice, and then the organic solvent was evaporated to dryness. IOml methanol was added, concentrated hydrochloric acid was added to adjust Xeon acidic. Evaporated methanol, washed with acetone to give the product 2.08g, yield 96.3%. M + H 451, MH 449.

Example 6

[0044] N- [2- (diisopropylamino) ethyl] -2 – [(hydroxy _4,5_ 2_ dimethoxybenzoyl) amino] -1,3-thiazol-4-carboxamide amide hydrochloride

2 – [(2-hydroxy-4,5-dimethoxybenzoyl) amino] thiazole _4_ _1,3_ carboxylate and 1.5g IOml 1,4- dioxane placed in a four-necked flask, N2 gas shielded at 75 ° C was added dropwise 1.5ml N, N- diisopropyl-ethylenediamine, rose after reflux, the reaction was stirred for 6 hours. The reaction was stopped, the solvent was evaporated to dryness under reduced pressure, 30ml CH2Cl2 was added dissolved in 20ml10% NaCl solution was washed twice, and then the organic solvent was evaporated to dryness. IOml methanol was added, concentrated hydrochloric acid was added to adjust Xeon acidic. Evaporated methanol, washed with acetone to give the product 1.76g, yield 84.7%.

PAPER

A Three-Step Synthesis of Acotiamide for the Treatment of Patients with Functional Dyspepsia

School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, Shandong P.R. China
Org. Process Res. Dev., 2015, 19 (12), pp 2006–2011
DOI: 10.1021/acs.oprd.5b00256
Publication Date (Web): November 13, 2015
Copyright © 2015 American Chemical Society
*E-mail: chm_zhenggx@ujn.edu.cn. Tel.: +8653182765841.

Abstract

Abstract Image

A three-step synthesis of acotiamide is described. The agent is marketed in Japan for treatment of patients with functional dyspepsia. We designed a one-pot method to prepare the key intermediate 5a from 2 via an acyl chloride and amide and then reacted with 6 to obtain 1 under solvent-free condition. With the use of DCC, the unavoidable impurity 5b was also successfully converted into the desired 1. After isolation of 1, we carried forward to the next step of HCl salt formation, which was proved to be a very effective procedure for the removal of practically all major impurities. The process is cost-effective, simple to operate, and easy to scale-up.

http://pubs.acs.org/doi/abs/10.1021/acs.oprd.5b00256

see………….http://pubs.acs.org/doi/suppl/10.1021/acs.oprd.5b00256/suppl_file/op5b00256_si_001.pdf

 

 

 

References

Matsueda K, Hongo M, Tack J, Aoki H, Saito Y, Kato H (January 2010). “Clinical trial: dose-dependent therapeutic efficacy of acotiamide hydrochloride (Z-338) in patients with functional dyspepsia – 100 mg t.i.d. is an optimal dosage”. Neurogastroenterology and Motility : the Official Journal of the European Gastrointestinal Motility Society 22 (6): 618–e173. doi:10.1111/j.1365-2982.2009.01449.x. PMID 20059698.

: Mayanagi S, Kishino M, Kitagawa Y, Sunamura M. Efficacy of acotiamide in combination with esomeprazole for functional dyspepsia refractory to proton-pump inhibitor monotherapy. Tohoku J Exp Med. 2014;234(3):237-40. PubMed PMID: 25382232.

2: Zai H, Matsueda K, Kusano M, Urita Y, Saito Y, Kato H. Effect of acotiamide on gastric emptying in healthy adult humans. Eur J Clin Invest. 2014 Dec;44(12):1215-21. doi: 10.1111/eci.12367. PubMed PMID: 25370953.

3: Xiao G, Xie X, Fan J, Deng J, Tan S, Zhu Y, Guo Q, Wan C. Efficacy and safety of acotiamide for the treatment of functional dyspepsia: systematic review and meta-analysis. ScientificWorldJournal. 2014;2014:541950. doi: 10.1155/2014/541950. Epub 2014 Aug 12. PubMed PMID: 25197703; PubMed Central PMCID: PMC4146483.

4: Sun Y, Song G, McCallum RW. Evaluation of acotiamide for the treatment of functional dyspepsia. Expert Opin Drug Metab Toxicol. 2014 Aug;10(8):1161-8. doi: 10.1517/17425255.2014.920320. Epub 2014 May 31. PubMed PMID: 24881488.

5: Matsunaga Y, Tanaka T, Saito Y, Kato H, Takei M. [Pharmacological and clinical profile of acotiamide hydrochloride hydrate (Acofide(®) Tablets 100 mg), a novel therapeutic agent for functional dyspepsia (FD)]. Nihon Yakurigaku Zasshi. 2014 Feb;143(2):84-94. Review. Japanese. PubMed PMID: 24531902.

6: Nowlan ML, Scott LJ. Acotiamide: first global approval. Drugs. 2013 Aug;73(12):1377-83. doi: 10.1007/s40265-013-0100-9. Erratum in: Drugs. 2014 Jun;74(9):1059. Nolan, Mary L [corrected to Nowlan, Mary L]. PubMed PMID: 23881665.

7: Altan E, Masaoka T, Farré R, Tack J. Acotiamide, a novel gastroprokinetic for the treatment of patients with functional dyspepsia: postprandial distress syndrome. Expert Rev Gastroenterol Hepatol. 2012 Sep;6(5):533-44. doi: 10.1586/egh.12.34. Review. PubMed PMID: 23061703.

8: Nagahama K, Matsunaga Y, Kawachi M, Ito K, Tanaka T, Hori Y, Oka H, Takei M. Acotiamide, a new orally active acetylcholinesterase inhibitor, stimulates gastrointestinal motor activity in conscious dogs. Neurogastroenterol Motil. 2012 Jun;24(6):566-74, e256. doi: 10.1111/j.1365-2982.2012.01912.x. Epub 2012 Mar 19. PubMed PMID: 22429221.

9: Kusunoki H, Haruma K, Manabe N, Imamura H, Kamada T, Shiotani A, Hata J, Sugioka H, Saito Y, Kato H, Tack J. Therapeutic efficacy of acotiamide in patients with functional dyspepsia based on enhanced postprandial gastric accommodation and emptying: randomized controlled study evaluation by real-time ultrasonography. Neurogastroenterol Motil. 2012 Jun;24(6):540-5, e250-1. doi: 10.1111/j.1365-2982.2012.01897.x. Epub 2012 Mar 4. PubMed PMID: 22385472.

10: McLarnon A. Dyspepsia: Acotiamide can relieve symptoms of functional dyspepsia. Nat Rev Gastroenterol Hepatol. 2012 Jan 17;9(2):62. doi: 10.1038/nrgastro.2011.262. PubMed PMID: 22249733.

 

CN103665023A * Dec 23, 2013 Mar 26, 2014 华润赛科药业有限责任公司 Synthetic method of acotiamide hydrochloride
CN103980226A * May 10, 2014 Aug 13, 2014 杭州新博思生物医药有限公司 Acotiamide hydrochloride hydrate crystal form and preparation method thereof
CN104031001A * Jun 30, 2014 Sep 10, 2014 山东诚创医药技术开发有限公司 Method for preparing 2-(N-(2,4,5-trimothoxyaniline) amino]-4-carbethoxy-1,3-thiazole by using one-pot process
CN104031001B * Jun 30, 2014 Sep 30, 2015 山东诚创医药技术开发有限公司 一锅烩制备2-[n-(2,4,5-三甲氧基苯甲胺基)氨基]-4-乙氧羰基-1,3-噻唑的方法
CN104045606A * Jul 11, 2014 Sep 17, 2014 杭州新博思生物医药有限公司 One-pot method for preparing acotiamide hydrochloride
CN104045606B * Jul 11, 2014 Sep 30, 2015 杭州新博思生物医药有限公司 一锅法制备阿考替胺盐酸盐的方法
CN103665023A * Dec 23, 2013 Mar 26, 2014 华润赛科药业有限责任公司 Synthetic method of acotiamide hydrochloride
CN104045606A * Jul 11, 2014 Sep 17, 2014 杭州新博思生物医药有限公司 One-pot method for preparing acotiamide hydrochloride
CN104045606B * Jul 11, 2014 Sep 30, 2015 杭州新博思生物医药有限公司 一锅法制备阿考替胺盐酸盐的方法
Acotiamide
Acotiamide.png
Systematic (IUPAC) name
N-{2-[Bis(1-methylethyl)amino]ethyl}-2-{[(2-hydroxy-4,5-dimethoxyphenyl)carbonyl]amino}-1,3-thiazole-4-carboxamide
Clinical data
Legal status
  • Uncontrolled
Routes of
administration
Oral
Identifiers
CAS Number 185106-16-5 
ATC code None
PubChem CID: 5282338
ChemSpider 4445505 Yes
UNII D42OWK5383 Yes
ChEMBL CHEMBL2107723 
Chemical data
Formula C21H30N4O5S
Molecular mass 450.55 g/mol

Approval in Japan for Treating Functional Dyspepsia with Acofide®

Press Release


Tokyo, March 25, 2013
– Zeria Pharmaceutical Co., Ltd. (Tokyo: 4559; “Zeria”) and Astellas Pharma Inc. (Tokyo: 4503; “Astellas”) announced today that as of March 25, Zeria has obtained the marketing approval of Acofide® Tablets 100mg (nonproprietary name: acotiamide hydrochloride hydrate; “Acofide”; Zeria’sdevelopment code: “Z-338”; Astellas’s development code: “YM443”) for the treatment of functional dyspepsia(FD) from the Ministry of Health, Labour and Welfare in Japan. Acofide has been co-developed by both companies.

Acotiamide hydrochloride hydrate is a new chemical entity originated by Zeria, and inhibits peripheralacetylcholinesterase activities. Acetylcholine is an important neurotransmitter to regulate gastrointestinalmotility, and through the inhibition of degradation of acetylcholine, Acofide improves the impaired gastricmotility and delayed gastric emptying, and consequently the subjective symptoms of FD such as postprandialfullness, upper abdominal bloating, and early satiation.

Acofide, the world first FD treatment which demonstrated efficacy in the patients with FD diagnosed by the Rome III, will be launched in Japan ahead of the rest of the world.Also, since Acofide will be the first treatment with FD indication, Zeria and Astellas will co-promote Acofide for the sake of the increase of disease awareness of FD, the prompt market penetration, and the maximization of product potential.

In March 2008, Zeria and Astellas concluded the agreement for the co-development and co-marketing of Acofide and, subsequently conducted the co-development. In September 2010, Zeria submitted the application for marketing approval to the Ministry of Health, Labour and Welfare in Japan.

We believe that Acofide will contribute to alleviate the subjective symptoms and improve QOL of patients with FD.

Summary of Approval

Product name: Acofide® Tablets 100mg

Nonproprietary name: Acotiamide hydrochloride hydrate

Formulation: Tablet

Indication: Postprandial fullness, upper abdominal bloating, and early satiation due to functional dyspepsia

Dosage regimen: Normally in adults, 100mg of acotiamide hydrochloride hydrate is taken orally three times per day before a meal.

About Functional Dyspepsia (FD)

According to the Rome III, FD is a gastrointestinal disease comprised of subjective symptoms including postprandial fullness, early satiation and epigastric pain without any organic abnormality on gastrointestinal tract. The etiology of FD is still unclear, but it has been shown that delayed gastric emptying is closely associated with FD.

For inquiries or additional information

Zeria Pharmaceutical Co., Ltd.

Public Relations

TEL:+81-3-3661-1039, FAX:+81-3-3663-4203

http://www.zeria.co.jp/english

Astellas Pharma Inc.

Corporate Communications

TEL: +81-3-3244-3201, FAX:+81-3-5201-7473

http://www.astellas.com/en

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