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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 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 amcrasto@gmail.com, 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......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 He has total of 32 International and Indian awards

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NEW PATENT, WO2016001844, SUN PHARMACEUTICALS, AFATINIB DIMALEATE


WO2016001844,

AMORPHOUS FORM OF AFATINIB DIMALEATE

SUN PHARMACEUTICAL INDUSTRIES LIMITED

VERMA, Shyam Sunder; (IN).
SINGH, Shravan Kumar; (IN).
SINGH, Kaptan; (IN).
PRASAD, Mohan; (IN)

Afatinib dimaleate is a tyrosine kinase inhibitor, chemically designated as 2-butenamide, N-[4-[(3-chloro-4-fluorophenyl)amino]-7-[[(35)-tetrahydro-3-furanyl]oxy]-6-quinazolinyl]-4-(dimethylamino)-,(2£)-, (2Z)-2-butenedioate (1:2) having the structure depicted by Formula I.

Formula I

U.S. Patent Nos. RE43,431 and 6,251,912 provide processes for the preparation of afatinib dimaleate.

U.S. Patent No. 8,426,586 and PCT Publication Nos. WO 2012/121764 and WO

2013/052157 provide processes for the preparation of crystalline forms of afatinib and their salts.

Example: Preparation of an amorphous form of afatinib dimaleate

In a round bottom flask, a mixture of afatinib (3 g) and ethyl acetate (30 mL) was heated to about 65°C to obtain a turbid solution. In another round bottom flask, a mixture of maleic acid (1.6 g) and ethyl acetate (30 mL) was heated to about 50°C to obtain a clear solution. The maleic acid solution was added to the afatinib solution, and then the reaction mixture was heated at about 75°C to about 80°C. The reaction mixture was stirred at about 75°C to about 80°C for about 1 hour. The reaction mixture was cooled to about

20°C to obtain a sticky material. The sticky material was scratched with a spatula, and then the reaction mixture was further stirred at about 20°C to about 25°C for about 1 hour. The material obtained was filtered, and then washed with ethyl acetate (20 mL). The solid obtained was dried under vacuum at about 45°C to about 50°C for about 15 hours to obtain the amorphous form of afatinib dimaleate.

Yield: 2.5 g (56%)

Sun Pharma chief Dilip Shanghvi

 

 

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