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Read all about Organic Spectroscopy on ORGANIC SPECTROSCOPY INTERNATIONAL 

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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 AFRICURE PHARMA, ROW2TECH, NIPER-G, Department of Pharmaceuticals, Ministry of Chemicals and Fertilizers, Govt. of India as ADVISOR, earlier assignment was with GLENMARK LIFE SCIENCES LTD, as CONSUlTANT, Retired from GLENMARK in Jan2022 Research Centre as Principal Scientist, Process Research (bulk actives) at Mahape, Navi Mumbai, India. Total Industry exp 32 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, 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 32 PLUS year tenure till date Feb 2023, 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 100 million plus hits on Google, 2.5 lakh plus connections on all networking sites, 100 Lakh plus views on dozen plus blogs, 227 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 38 lakh plus views on New Drug Approvals Blog in 227 countries...... , He appreciates the help he gets from one and all, Friends, Family, Glenmark, Readers, Wellwishers, Doctors, Drug authorities, His Contacts, Physiotherapist, etc He has total of 32 International and Indian awards

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Cipla introduces Serroflo for respiratory treatment in Germany and Sweden

India-based Cipla has introduced Serroflo (salmeterol/fluticasone MDI) in Germany and Sweden to treat patients suffering from asthma.




Serroflo is expected to improve the affordability of fixed combinations in Europe and help manage health costs for respiratory treatment.

Cipla Europe head Frank Pieters said: “With Serroflo, we offer in Germany and Sweden an alternative, which is effective and efficient and therefore brings many advantages into a market, which suffers from limited resources.”

The new product is available under the name Serroflo in Germany, while it is introduced as Salmeterol/Fluticasone Cipla in Sweden.

Cipla’s shares have vaulted to a record high after the launch of first of its combination inhalers in Germany and Sweden that marked its entry into Europe. Analysts say the launch will lead to a gradual rerating of the stock of the drug maker which has been underperforming its peers.
Cipla launches combination inhalers in Germany and Sweeden; stocks touch all time high, may trigger rerating


Merck’s New Drug Application for an Investigational Intravenous (IV) Formulation of NOXAFIL® (posaconazole) Receives FDA Priority Review

Posaconazole,  SCH 56592, Noxafil (Schering-Plough)

Posaconazole is a triazole antifungal drug that is used to treat invasive infections by Candida species and Aspergillus species in severely immunocompromised patients.

For prophylaxis of invasive Aspergillus and Candida infections in patients, 13 years of age and older, who are at high risk of developing these infections due to being severely immunocompromised as a result of procedures such as hematopoietic stem cell transplant (HSCT) recipients with graft-versus-host disease (GVHD), or due to hematologic malignancies with prolonged neutropenia from chemotherapy. Also for the treatment of oropharyngeal candidiasis, including oropharyngeal candidiasis refractory to itraconazole and/or fluconazole. Posaconazole is used as an alternative treatment for invasive aspergillosis, Fusarium infections, and zygomycosis in patients who are intolerant of, or whose disease is refractory to, other antifungals

Posaconazole is designated chemically as 4-[4-[4-[4-[[ (3R,5R)-5- (2,4-difluorophenyl)tetrahydro-5-(1H-1,2,4-triazol-1 -ylmethyl)-3-furanyl]methoxy]phenyl]-1 -piperazinyl]phenyl]-2-[ (1S,2S)-1 -ethyl-2- hydroxypropyl]-2,4-dihydro-3H-1,2,4-triazol-3-one with an empirical formula of C37H42F2N8O4 and a molecular weight of 700.8.

Posaconazole is used, for example, to prevent and/or treat invasive fungal infections caused by Candida species, Mucor species, Aspergillus species,Fusarium species, or Coccidioides species in immunocompromised patients and/or in patients where the disease is refractory to other antifungal agents such as amphothericin B, fluconazole, or itraconazole, and/or in patients who do not tolerate these antifungal agents.

CAS No. 171228-49-2

Posaconazole compounds have been described inU.S. Pat. Appl. No. 2003/0055067 for “Antifungal Composition with Enhanced Bioavailability,” U.S. Pat. Appl. No. 2004/0058974 for “Treating Fungal Infections,” and European Patent Publication1372394 (A1 ) for “Liquid Suspensions of Posaconazole (SCH 56592) with Enhanced Bioavailability for Treating Fungal Infections.”

Synonyms: Pcz;Pos;Noxafil;Sch 56592;Aids058495;Aids-058495;Posconazole;Posaconazole;Posaconazole for research;HYDROXYPROPYL]-2,4-DIHYDRO-3H-1,2,4-TRIAZOL-3-ONE
Molecular Formula: C37H42F2N8O4
Formula Weight: 700.78



Merck’s New Drug Application for an Investigational Intravenous (IV) Formulation of NOXAFIL® (posaconazole) Receives FDA Priority Review

Marketing Authorization Application also Filed with the European Medicines Agency

WHITEHOUSE STATION, N.J., Nov. 18, 2013–(BUSINESS WIRE)–Merck (NYSE:MRK), known as MSD outside the United States and Canada, today announced that its New Drug Application for an investigational intravenous (IV) solution formulation of the company’s antifungal agent, NOXAFIL® (posaconazole), has been accepted for priority review by the U.S. Food and Drug Administration (FDA).

Posaconazole (CAS Registry Number 171228-49-2; CAS Name: 2,5-anhydro-1 ,3,4-trideoxy-2- C-(2,4-difluorophenyl)-4-[[4-[4-[4-[1-[(1S,2S)-1-ethyl-2-hydroxypropyl]-1 ,5-dihydro-5-oxo-4H- 1 ,2,4-triazol-4-yl]phenyl]-1-piperazinyl]phenoxy]methyl]-1-(1 H-1 ,2,4-triazol-1-yl)-D-threo-pentitol) which is represented by the following general formula (I)

Figure imgf000002_0001


is known as an antifungal agent. It is available as an oral suspension (40 mg/ml) under the trademark NOXAFIL® from Schering Corporation, Kenilworth, NJ. WO95/17407 and WO 96/38443 disclose the compound having the general formula (I) and its use in treating fungal infections. Various pharmaceutical compositions comprising posaconazole and being adapted for oral, topical or parenteral use are described e.g. in WO 02/80678, U.S. Patent No. 5,972,381 , U.S. Patent No. 5,834,472, U.S. Patent No. 4,957,730 and WO 2005/117831. As was mentioned above, WO 95/17407 and WO 96/38443 disclose the compound having the general formula (I). However, during prosecution of the subsequently filed European patent application no. 98951994.7, now European patent EP 1 021 439 B1 , the applicant declared that the methods disclosed in these publications only lead to the compound of formula (I) as an amorphous solid.

Polymorphism is a phenomenon relating to the occurrence of different crystal forms for one molecule. There may be several different crystalline forms for the same molecule with distinct crystal structures and distinct and varying physical properties like melting point, XRPD pattern, IR-spectrum and solubility profile. These polymorphs are thus distinct solid forms which share the molecular formula of the compound from which the crystals are made up, however, they may have distinct advantageous physical properties which can have a direct effect on the ability to process and/or manufacture the drug product, like flowability, as well as physical properties such as solubility, stability and dissolution properties which can have a direct effect on drug product stability, solubility, dissolution, and bioavailability.

Three polymorphic forms of posaconazole designated as forms I, Il and III are described and characterized in WO 99/18097 (US-B-6,713,481 , US-B-6,958,337). Crystalline forms Il and III were found to be unstable under the conditions investigated, so that crystalline form I was considered to be useful in the development of a pharmaceutical product.

A. K. Saksena et al., WO 9517407eidemUS 5661151 (1995, 1997 both to Schering);

eidemTetrahedron Lett. 37, 5657 (1996).

SCH-56592, a novel orally active broad spectrum antifungal agent35th Intersci Conf Antimicrob Agents Chemother (Sept 17-20, San Francisco) 1995,Abst F61

seeSaksena, A.K.; Girijavallabhan, V.M.; Lovey, R.G.; Pike, R.E.; Wang, H.; Liu, Y.-T.; Ganguly, A.K.; Bennett, F. (Schering Corp.) EP 0736030; JP 1997500658; US 5661151; US 5703079; WO 9517407

Process for the preparation of triazolonesWO 9633178

Mono N-arylation of piperazine(III): Metal-catalyzed N-arylation and its application to the novel preparations of the antifungal posaconazole and its advanced intermediateTetrahedron Lett 2002,43(18),3359

Comparative antifungal spectrum: A. Cacciapuoti et al., Antimicrob. Agents Chemother. 44, 2017 (2000).

Pharmacokinetics, safety and tolerability: R. Courtney et al., ibid. 47, 2788 (2003).

HPLC determn in serum: H. Kim et al., J. Chromatogr. B 738, 93 (2000).

Review of development: A. K. Saksena et al. inAnti-Infectives: Recent Advances in Chemistry and Structure Activity Relationships (Royal Soc. Chem., Cambridge, 1997) pp 180-199; and clinical efficacy in fungal infections: R. Herbrecht, Int. J. Clin. Pract. 58, 612-624 (2004).

synthesis 1


Synthesis of intermediate (XX): The reaction of 2-chloro-2′,4′-difluoroacetophenone (I) with sodium acetate and NaI in DMF gives 2-acetoxy-2′,4′-difluoroacetophenone (II), which by methylenation with methyltriphenylphosphonium bromide and sodium bis(trimethylsilyl)amide in THF yields 2-(2,4-difluorophenyl)-2-propen-1-ol acetate ester (III). The hydrolysis of (III) with KOH in dioxane/water affords the corresponding alcohol (IV), which is regioselectively epoxidized with titanium tetraisopropoxide and L-(+)-diethyl tartrate in dichloromethane to (S)-(-)-2-(2,4-difluorophenyl)oxirane-2-methanol (V). The reaction of (V) with 1,2,4-triazole (VI) in DMF affords (R)-2-(2,4-difluorophenyl)-3-(1,2,4-triazol-1-yl)propane-1,2-diol (VII), which is selectively mesylated with methanesulfonyl chloride and triethylamine to the monomesylate (VIII). The cyclization of (VIII) with NaH in DMF gives the oxirane (IX), which is condensed with diethyl malonate (X) by means of NaH in DMSO to yield a mixture of (5R-cis)- and (5R-trans)-5-(2,4-difluorophenyl)-2-oxo-5-(1,2,4-triazol-1-ylmethyl) tetrahydrofuran-3-carboxylic acid ethyl ester (XI). The reduction of (XI) with NaBH4 and LiCl in ethanol affords (R)-4-(2,4-difluorophenyl)-2-(hydroxymethyl)-5-(1,2,4-triazol-1-yl) pentane-1,4-diol (XII), which is selectively tosylated with tosyl chloride and triethylamine in THF to the bistosylate (XIII). The cyclization of (XIII) by means of NaH in refluxing toluene gives (5R-cis)-5-(2,4-difluorophenyl)-5-(1,2,4-triazol-1-ylmethyl) tetrahydrofuran-3-methanol tosylate ester (XIV). The reaction of (XIV) with 1-(4-hydroxyphenyl)-4-(4-nitrophenyl)piperazine (XV) to obtain compound (XVI), and the following reaction sequence (XVI) to (XVII) to (XVIII) to (XIX) to (5R-cis)-4-[4-[4-[4-[5-(2,4-difluorophenyl)-5-(1,2,4-triazol-1-ylmethyl)tetrahydrofuran-3-ylmethoxy]phenyl]piperazin-1-yl]phenyl-3,4-dihydro-2H-1,2,4-triazol-3-one (XX) has been performed according to J Med Chem 1984, 27: 894-900.

………………….pat             approved      expiry

United States 5661151 1999-07-19 2019-07-19
Canada 2305803 2009-12-22 2018-10-05
Canada 2179396 2001-04-17 2014-12-20
United States 5703079 1994-08-26 2014-08-26



US  Patent No Patent expiry
5661151 Jul 19, 2019
5703079 Aug 26, 2014
6958337 Oct 5, 2018
8263600 Apr 1, 2022


  1. Cornely OA, Maertens J, Winston DJ, Perfect J, Ullmann AJ, Walsh TJ, Helfgott D, Holowiecki J, Stockelberg D, Goh YT, Petrini M, Hardalo C, Suresh R, Angulo-Gonzalez D: Posaconazole vs. fluconazole or itraconazole prophylaxis in patients with neutropenia. N Engl J Med. 2007 Jan 25;356(4):348-59. Pubmed
  2. Ullmann AJ, Lipton JH, Vesole DH, Chandrasekar P, Langston A, Tarantolo SR, Greinix H, Morais de Azevedo W, Reddy V, Boparai N, Pedicone L, Patino H, Durrant S: Posaconazole or fluconazole for prophylaxis in severe graft-versus-host disease. N Engl J Med. 2007 Jan 25;356(4):335-47. Pubmed
  3. Bhattacharya M, Rajeshwari K, Dhingra B: Posaconazole. J Postgrad Med. 2010 Apr-Jun;56(2):163-7. Pubmed
  4. Frampton JE, Scott LJ: Posaconazole : a review of its use in the prophylaxis of invasive fungal infections. Drugs. 2008;68(7):993-1016.Pubmed
  5. Schiller DS, Fung HB: Posaconazole: an extended-spectrum triazole antifungal agent. Clin Ther. 2007 Sep;29(9):1862-86. Pubmed
  6. Kwon DS, Mylonakis E: Posaconazole: a new broad-spectrum antifungal agent. Expert Opin Pharmacother. 2007 Jun;8(8):1167-78.Pubmed
  7. Groll AH, Walsh TJ: Posaconazole: clinical pharmacology and potential for management of fungal infections. Expert Rev Anti Infect Ther. 2005 Aug;3(4):467-87. Pubmed
  8. Rachwalski EJ, Wieczorkiewicz JT, Scheetz MH: Posaconazole: an oral triazole with an extended spectrum of activity. Ann Pharmacother. 2008 Oct;42(10):1429-38. Epub 2008 Aug 19. Pubmed
  9. Li Y, Theuretzbacher U, Clancy CJ, Nguyen MH, Derendorf H: Pharmacokinetic/pharmacodynamic profile of posaconazole. Clin Pharmacokinet. 2010 Jun;49(6):379-96. doi: 10.2165/11319340-000000000-00000. Pubmed

EMA Accepts AstraZeneca’s Naloxegol Application


Morphinan-3,14-diol, 4,5-epoxy-6-(3,6,9,12,15,18,21-heptaoxadocos-1-yloxy)-17-(2-
propen-1-yl)-, (5α,6α)-



SPONSOR AstraZeneca

Marketing Authorisation Application for naloxegol accepted by European Medicines Agency

Friday, 27 September 2013

AstraZeneca today announced that the European Medicines Agency (EMA) has accepted the Marketing Authorisation Application (MAA) for naloxegol, an investigational peripherally-acting mu-opioid receptor antagonist, which has been specifically designed for the treatment of opioid-induced constipation (OIC) for adult patients 18 years and older, including patients with inadequate response to laxatives.

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Naloxegol (INNNKTR-118), or PEGylated naloxol,[1] is a peripherallyselective opioid antagonist under development byAstraZeneca, licensed from Nektar, for the treatment of opioid-induced constipation.[2]

Opioids are commonly prescribed to patients experiencing chronic pain, which can provide relief from serious medical conditions including osteoarthritis, cancer, and chronic back pain.  There are about 250 million opioid prescriptions written annually in the US alone to treat these conditions.  Patients taking opioids to treat chronic pain commonly experience a side effect known as opioid-induced constipation, which may include infrequent bowel movements and difficulty passing stools or emptying bowels. Clinically, OIC is the most prevalent side effect of opioid therapy.  For those patients who take opiates for long term pain management, approximately 40-50 percent commonly experience OIC.5 Only about 40-50 percent of those patients experience effective relief from current treatment options

  1. ^ Roland Seifert; Thomas Wieland; Raimund Mannhold; Hugo Kubinyi, Gerd Folkers (17 July 2006). G Protein-Coupled Receptors as Drug Targets: Analysis of Activation and Constitutive Activity. John Wiley & Sons. p. 227. ISBN 978-3-527-60695-5. Retrieved 14 May 2012.
  2. ^ “Nektar | R&D Pipeline | Products in Development | CNS/Pain | Oral Naloxegol (NKTR-118) and Oral NKTR-119”. Retrieved 2012-05-14.

Naloxegol (NKTR-118) is an investigational drug candidate in Phase 3 studies being developed as a once-daily oral tablet for the treatment of opioid-induced constipation. Naloxegol (NKTR-118) was designed using Nektar’s proprietary small molecule polymer conjugate technology. Results of the Phase 2 study of naloxegol (NKTR-118) were presented in October 2009 at the American College of Gastroenterology Annual Clinical Meeting and the American Academy of Pain Management. NKTR-119 is an early stage drug development program that is intended to combine oral naloxegol (NKTR-118) with selected opioids, with the goal of treating pain without the side effect of constipation traditionally associated with opioid therapy.

Nektar and AstraZeneca have a global agreement for both naloxegol (NKTR-118) and NKTR-119. Under the agreement, AstraZeneca has responsibility for the development, global manufacturing and marketing of both naloxegol (NKTR-118) and NKTR-119. For naloxegol (NKTR-118), Nektar is eligible to receive up to $235 million in aggregate payments upon the achievement of certain regulatory milestones, as well as additional tiered sales milestone payments of up to $375 million if the product achieves considerable levels of commercial success. Nektar will also be eligible to receive significant double-digit royalty payments on net sales of naloxegol (NKTR-118) worldwide. For NKTR-119, Nektar would receive development milestone payments as well as tiered sales milestone payments. Nektar will also receive significant double-digit royalty payments on NKTR-119 net sales worldwide.

oxalate derivative

Morphinan-3,14-diol, 4,5-epoxy-6-(3,6,9,12,15,18,21-heptaoxadocos-1-yloxy)-
17-(2-propen-1-yl)-, (5α,6α)-, ethanedioate (1:1)
enyl)morphinan-3,14-diol hydrogen ethanedioate

TRADEMARK None as yet
SPONSOR AstraZeneca
CODE DESIGNATIONS NKTR-118 oxalate, AZ13337019 oxalate

MAA EU -GSK submits diabetes drug Eperzan, albiglutide in EU

MAA EU =marketing authorisation application EU

MAR 08 2013

GSK submits diabetes drug albiglutide in EU

GlaxoSmithKline has announced the submission of a marketing authorisation application for albiglutide, which will have the brand name Eperzan, to the European Medicines Agency.

The filing of albiglutide, a once-weekly treatment for type 2 diabetes, comes almost two months after it was filed in the USA. The drug is a GLP-1 receptor agonist, the same class of injectable treatments dominated by Novo Nordisk’s once-a-day Victoza (liraglutide), twice-daily Byetta (exenatide) and an extended-release formulation of the latter, Bydureon. They were developed and sold by Amylin, which was then acquired by  Bristol-Myers Squibb and AstraZeneca.

The filing is based in part on a study which assessed albiglutide against Merck & Co’s DPP-4 inhibitor Januvia (sitagliptin) which showed that GSK’s drug showed clinically and statistically significant reductions in HbA1c from baseline and superiority versus the US firm’s diabetes blockbuster. However in data from a late-stage study released in November 2011, albiglutide failed to show non-inferiority to Victoza and a number of analysts believe GSK will have its work cut out to grab a decent share of the GLP-1 market.

Albiglutide is a glucagon-like peptide-1 agonist (GLP-1 agonist) drug under investigation by GlaxoSmithKline for treatment of type 2 diabetes. It is a dipeptidyl peptidase-4-resistant glucagon-like peptide-1 dimer fused to human albumin.

Albiglutide has a half-life of four to seven days, which is considerably longer than the other two GLP-1 analogs approved for market use, exenatide (Byetta) and liraglutide (Victoza).[1] [2] GLP-1 drugs are currently only available for subcutaneous administration on a daily basis, so a GLP-1 drug with a longer half-life is desirable. Such a drug would only need to be injected biweekly or weekly instead of daily, reducing the discomfort and inconvenience of GLP-1 administration considerably.

It has not yet been determined whether albiglutide is as effective an antidiabetic agent as GLP-1 drugs currently on the market, and final data remain to be published regarding the incidence of adverse effects related to the drug. To evaluate the efficacy and safety of the drug, albiglutide is undergoing eight Phase III clinical trials. Four of these trials should report useful data by end 2010.[3]

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