New Drug Approvals

Home » Posts tagged 'SGLT-2 inhibitor'

Tag Archives: SGLT-2 inhibitor


Blog Stats

  • 3,948,983 hits

Flag and hits

Flag Counter

Enter your email address to follow this blog and receive notifications of new posts by email.

Join 2,725 other followers

Follow New Drug Approvals on



Recent Posts

Flag Counter


Read all about Organic Spectroscopy on ORGANIC SPECTROSCOPY INTERNATIONAL 

Enter your email address to follow this blog and receive notifications of new posts by email.

Join 2,725 other followers



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 LIFE SCIENCES 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 PLUS year tenure till date June 2021, 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, 90 Lakh plus views on dozen plus blogs, 233 countries, 7 continents, He makes himself available to all, contact him on +91 9323115463, email, Twitter, @amcrasto , He lives and will die for his family, 90% paralysis cannot kill his soul., Notably he has 33 lakh plus views on New Drug Approvals Blog in 233 countries...... , He appreciates the help he gets from one and all, Friends, Family, Glenmark, Readers, Wellwishers, Doctors, Drug authorities, His Contacts, Physiotherapist, etc

Personal Links

Verified Services

View Full Profile →



Flag Counter

Enavogliflozin, DWP-16001

Image result for south korea flag gif



Enavogliflozin, DWP-16001



CAS: 1415472-28-4
Chemical Formula: C24H27ClO6
Molecular Weight: 446.92
Elemental Analysis: C, 64.50; H, 6.09; Cl, 7.93; O, 21.48

Green Cross Corp INNOVATOR

Daewoong Pharmaceutical Co Ltd

Enavogliflozin is an antidiabetic (hypoglycemic).

Daewoong is investigating DWJ-304 , a sodium/glucose cotransporter 2 (SGLT-2) inhibitor, for treating type 2 diabetes. By February 2017, preclinical development was underway. Daewoong is developing DWP-16001 , presumed to be enavogliflozin, a SGLT-2 inhibitor, for treating type 2 diabetes. In September 2019, launch was expected in 2023.



DWP-16001 expire in  EU states until June 2032 and  US in November 2033.


US 2014274918



Paragraph 0305; 0340; 0347

H NMR (400 MHz, CD3OD) δ 7.02 (d, J=8.0 Hz, 2H), 6.92 (d, J=8.0 Hz, 2H), 6.81 (s, 1H), 4.59 (t, J=8.8 Hz, 2H), 4.11 (d, J=9.2 Hz, 1H), 3.96 (ABq, ΔvAB=19.0 Hz, JAB=15.2 Hz, 2H), 3.87-3.84 (m, 1H), 3.67-3.63 (m, 1H), 3.47-3.37 (m, 3H), 3.35-3.33 (m, 3H), 1.85-1.79 (m, 1H), 0.91-0.86 (m, 2H), 0.61-0.57 (m, 2H)


WO2017217792 , claiming process for preparing diphenylmethane derivative.

1H NMR(400 MHz, CD 3OD) δ 7.02(d, J = 8.0 Hz, 2H), 6.92(d, J = 8.0 Hz, 2H), 6.81(s, 1H), 4.59(t, J = 8.8 Hz, 2H), 4.11(d, J = 9.2 Hz, 1H), 3.96(ABq, Δv AB = 19.0 Hz, J AB = 15.2 Hz, 2H), 3.87-3.84(m, 1H), 3.67-3.63(m, 1H), 3.47-3.37(m, 3H), 3.35-3.33(m, 3H), 1.85-1.79(m, 1H), 0.91-0.86(m, 2H), 0.61-0.57(m, 2H); [M+Na] + 469.



The present invention relates to a method for producing an intermediate useful for the synthesis of a diphenylmethane derivative that can be used as a SGLT inhibitor. A method for synthesizing a compound of formula 7 according to the present invention has solved the problem of an existing synthesis process which requires an additional process due to the synthesis of Grignard reagent and the management of a related substance. In addition, the process can be simplified by minimizing the formation of the related substance and eliminating the need for reprocessing of reaction products, thereby becoming capable of maximizing a yield of a diphenylmethane derivative.

Process for preparing intermediates of SGLT inhibitor and their use for the synthesis of diphenyl-methane derivative, which can be used as SGLT inhibitors.

Sodium-dependent glucose cotransporters (SGLT) allow the transport of Na + along the concentration gradient simultaneously with the transport of glucose across the concentration gradient. Currently two important SGLT isoforms have been cloned, known as SGLT1 and SGLT2. SGLT1 is located in the intestine, kidney and heart and regulates cardiac glucose transport. SGLT1 is a high affinity low dose transporter and therefore only accounts for a portion of renal glucose reuptake. In contrast, SGLT2 is a low affinity, high dose transporter located primarily in the apica domain of epithelial cells in the early proximal manure tubules. In healthy individuals, over 99% of the plasma glucose filtered out of the renal glomeruli is reabsorbed and less than 1% of the total filtered glucose is excreted in the urine. It is estimated that 90% of renal glucose reuptake is promoted by SGLT2 and the remaining 10% is mediated by SGLT1 in the late proximal canal. Genetic mutations in SGLT2 do not have a particular adverse effect on carbohydrate metabolism but cause increased kidney glucose secretion of about 140 g / day following mutation. Human mutation studies have been the subject of therapeutic studies because SGLT2 is believed to be responsible for most renal glucose resorption.

Korean Unexamined Patent Publication No. 2017-0142904 discloses a method for producing a diphenylmethane derivative having inhibitory activity against SGLT2. Since the above document prepares diphenylmethane derivatives by a convergent synthesis method in which each group is individually synthesized and then coupled, the synthesis route is more concise and yield is higher than the linear synthesis method disclosed in the prior art. It is disclosed that it can increase and reduce the risks inherent in sequential synthesis pathways.

However, the preparation method of the diphenylmethane derivative according to Korean Patent Publication No. 2017-0142904 uses a heavy metal such as pyridinium chlorochromate (PCC) to burden safety management, and the Grignard reagent. In addition to the need for a separate manufacturing process, the cost of the additional process is not only incurred, but also the management of the flexible material is necessary because the flexible material from the Grignard reagent manufacturing process is included in the final product. In addition, since the product generated after the reaction between the intermediate and the Grignard reagent includes additional flexible materials, there is a problem that a reprocessing process of such flexible materials is required.
Step 3. 4- bromo- 7- chloro -6- (4- cyclopropylbenzyl ) -2,3- dihydrobenzofuran (Compound 6)
(4-bromo-7-chloro-2,3-dihydrobenzofuran-6-yl) (4-cyclopropylphenyl) methanone (Compound 5) in a mixture of dichloromethane (9.7 mL) and acetonitrile (9.7 mL) at -15 ° C. g, 2.57 mmol) was added Et 3 SiH (1.2 mL, 7.71 mmol) and BF 3 -Et 2 O (0.79 mL, 6.42 mmol) in this order. The reaction mixture was allowed to warm to room temperature and then stirred for 4 hours. After completion of the reaction by TLC, the reaction solution was added with saturated NaHCO 3aqueous solution (40 mL) to terminate the reaction, and extracted with ethyl acetate. The organic layer obtained by extraction was dried over anhydrous magnesium sulfate, filtered and concentrated in vacuo. The concentrated residue was purified by silica gel chromatography to give the title compound 6 (0.84 g, 89.9%) as an off-white solid.

1 H NMR (500 MHz, CDCl 3): δ 7.07 (d, J = 10.0 Hz, 2H), 6.99 (d, J = 10.0 Hz, 2H), 6.80 (s, 1H), 4.70 (t, J = 11.0 Hz , 2H), 3.97 (s, 2H), 3.26 (t, J = 11.0 Hz, 2H), 1.88-1.84 (m, 1H), 0.95-0.90 (m, 2H), 0.68-0.64 (m, 2H); LC-MS: [M + H] & lt; + & gt; 363.


1: Markiewicz M, Jungnickel C, Stolte S, Białk-Bielińska A, Kumirska J, Mrozik W. Ultimate biodegradability and ecotoxicity of orally administered antidiabetic drugs. J Hazard Mater. 2017 Jul 5;333:154-161. doi: 10.1016/j.jhazmat.2017.03.030. Epub 2017 Mar 16. PubMed PMID: 28349868.

2: Holt RI. Trials of new anti-diabetes agents. Diabet Med. 2017 Feb;34(2):147. doi: 10.1111/dme.13306. PubMed PMID: 28090726.

/////// DWJ-304, Daewoong Pharmaceutical, DWP-16001, SGLT-2 inhibitor, type 2 diabetes, KOREA, Enavogliflozin


Tianagliflozin IND filed by Tianjin Institute of Pharmaceutical research





taigeliejing, 6-deoxydapagliflozin

Molecular Formula: C21H25ClO5
Molecular Weight: 392.8732 g/mol

IND Filing…Tianjin Institute of Pharmaceutical research

Tianjin Institute Of Pharmaceutical Research,


D-​Glucitol, 1,​5-​anhydro-​1-​C-​[4-​chloro-​3-​[(4-​ethoxyphenyl)​methyl]​phenyl]​-​6-​deoxy-​, (1S)​-


A SGLT-2 inhibitor potentially for the treatment of type 2 diabetes.


CAS N. 1461750-27-5



The structures of dapagliflozin and 6-deoxydapagliflozin (1)

,deletion of the 6-OH in the sugar moiety of dapagliflozin led to the discovery of a more potent SGLT2 inhibitor, 6-deoxydapagliflozin (1, ). In an in vitro assay, 1 was a more active SGLT2 inhibitor, with IC 50 = 0.67 nM against human SGLT2 (hSGLT2), as compared with 1.1 nM for dapagliflozin, leading to the identification of 1 as the most active SGLT2 inhibitor discovered so far in this field. Also in an in vivo assay, 1 also introduced more urinary glucose in a rat urinary glucose excretion test (UGE) and exhibited more potent blood glucose inhibitory activity in a rat oral glucose tolerance test (OGTT) than dapagliflozin.

Given the fact that 6-dexoydapagliflozin (1) is a very promising SGLT2 inhibitor that could be used to treat type 2 diabetes, led to preclinical trials
 Tianjin Institute Of Pharmaceutical Research,天津药物研究院

SPECTRAL DATA of Tianagliflozin

1 as a white solid (3.65 g, 93 %). R f = 0.35 (EtOAc);

m.p.: 148–149 °C;

1H NMR (400 MHz, DMSO-d 6): δ = 7.35 (d, 1H, J = 8.4 Hz), 7.25 (s, 1H), 7.18 (d, 1H, J = 8.0 Hz), 7.08 (d, 2H, J = 8.4 Hz), 6.81 (d, 2H, J = 8.4 Hz), 4.95 (d, 1H, J = 5.2 Hz, OH), 4.90 (d, 1H, J = 4.4 Hz, OH), 4.79 (d, 1H, J = 5.6 Hz, OH), 3.92–4.01 (m, 5H), 3.24–3.29 (m, 1H), 3.18–3.22 (m, 1H), 3.09–3.15 (m, 1H), 2.89–2.95 (m, 1H), 1.29 (t, 3H, J = 7.0 Hz, CH2 CH 3 ), 1.15 (d, 3H, J = 6.0 Hz, CHCH 3 ) ppm;

13C NMR (100 MHz, DMSO-d 6): δ = 156.85, 139.65, 137.82, 131.83, 131.16, 130.58, 129.52, 128.65, 127.14, 114.26, 80.71, 77.98, 75.77, 75.51, 74.81, 62.84, 37.55, 18.19, 14.62 ppm;

IR (KBr): v¯¯¯ = 3,564 (w), 3,385 (s), 2,981 (s), 2,899 (s), 2,861 (s), 1,613 (m), 1,512 (s), 1,477 (m), 1,247 (s), 1,102 (s), 1,045 (s), 1,012 (s) cm−1;

HR–MS: calcd for C21H29ClNO5 ([M + NH4]+) 410.1729, found 410.1724.


 CN 103864737


WO 2014094544

Figure imgf000032_0001

Figure imgf000028_0006
Figure imgf000029_0001


Figure imgf000030_0001
Figure imgf000030_0002

1 D1 -6 Optionally, the step (7 ‘) is the step (7’) in place:

LS l- [4 – D (I- Dl- 6)

Figure imgf000041_0001


Figure imgf000041_0002

(DMSO-d 6, 400 MHz), δ 7.35 (d, 1H, J = 8.0 Hz), 7.28 (d, 1H, J ‘. 2.0 Hz), 7.17 (dd, IH, / = 2.0 Hz and 8.4 Hz), 7.05 (d, 2H, J: 8.8 Hz), 6.79 (d, 2H, 8.8 Hz): 4.924,95 (m, 2H), 4,81 (d, IH, 6,0 Hz), 3.93- 3.99 (m, 5H), 3,85 (d, 1H, J = 10,4 Hz), 3,66 (dd, IH, 5,2 Hz and 11,6 Hz), 3.17-3,28 (m, 3H), 3.02-3.08 (m: IH), 1.28 (t, 3H, J = 7,0 Hz), 0,80 (s, 9H), -0.05 (s, 3H), -0.09 (s, 3H) .


CN 104045614

[0066] The added 100mL dried over anhydrous methanol 0. 5g of sodium metal, nitrogen at room temperature with stirring, until the sodium metal disappeared. Followed by addition of 5. 2g (10mmol) of compound 6, stirring was continued at room temperature for 3 hours. To the reaction system was added 5g strong acid cation exchange resin, stirred at room temperature overnight, the reaction mixture until pH = 7. The resin was removed by suction, and the filtrate evaporated to dryness on a rotary evaporator, the residue was further dried on a vacuum pump to give the product I-D1-6, as a white foamy solid.


 WO 2014139447

PATENT related

Med Chem. 2015;11(4):317-28.

Design of SGLT2 Inhibitors for the Treatment of Type 2 Diabetes: A History Driven by Biology to Chemistry.


A brief history of the design of sodium-dependent glucose cotransporter 2 (SGLT2) inhibitors is reviewed. The design of O-glucoside SGLT2 inhibitors by structural modification of phlorizin, a naturally occurring O-glucoside, in the early stage was a process mainly driven by biology with anticipation of improving SGLT2/SGLT1 selectivity and increasing metabolic stability. Discovery of dapagliflozin, a pioneering C-glucoside SGLT2 inhibitor developed by Bristol-Myers Squibb, represents an important milestone in this history. In the second stage, the design of C-glycoside SGLT2 inhibitors by modifications of the aglycone and glucose moiety of dapagliflozin, an original structural template for almost all C-glycoside SGLT2 inhibitors, was mainly driven by synthetic organic chemistry due to the challenge of designing dapagliflozin derivatives that are patentable, biologically active and synthetically accessible. Structure-activity relationships (SAR) of the SGLT2 inhibitors are also discussed.


Discovery of 6-Deoxydapagliflozin as a Highly Potent Sodium-dependent Glucose Cotransporter 2 (SGLT2) Inhibitor for the Treatment of Type 2 Diabetes



A facile synthesis of 6-deoxydapagliflozin

Keywords. Carbohydrates Drug research Hydrogenolysis Dapagliflozin SGLT2 inhibitor

The synthetic route to the target compound 1 is shown in Scheme 3. The starting material methyl 2,3,4-tri-O-benzyl-6-deoxy-6-iodo-αd-glucopyranoside (3) was prepared from commercially available methyl αd-glucopyranoside (2) according to a known method [5, 6].

Iodide 3 was reductively deiodinated to give 4 in 91 % yield under hydrogenolytic conditions using 10 % Pd/C as catalyst in the presence of Et3N as base in THF/MeOH at room temperature.

when the iodide 3 was treated with Barton–McCombie reagent (n-Bu3SnH/AIBN) [7] in toluene at room temperature no reaction occurred; however, when the reaction was carried out at elevated temperatures, such as reflux, a complex mixture formed with only a trace amount (3 %, entry 1) of the desired product 4.

When the iodide 3 was treated with LiAlH4 in THF at 0 °C to room temperature, another complex mixture was produced with only a trace amount (2 %, entry 2) of 4.

When Pd(OH)2 was used as the hydrogenolysis catalyst instead of 10 % Pd/C, the desired 4 was indeed formed (14 %, entry 4), but most of the starting material was converted to a few more polar byproducts, which were believed to result from the cleavage of at least one of the benzyl groups.

pdf available

Monatshefte für Chemie – Chemical Monthly

December 2013, Volume 144, Issue 12, pp 1903-1910*~hmac=bd1c3c2bdc3712f5540267c99f732b2f7588020a868aa23021792a2a2a58d65e

////////IND Filing, SGLT-2 inhibitor, type 2 diabetes, Tianagliflozin, taigeliejing, 6-deoxydapagliflozin, 1461750-27-5


%d bloggers like this: