Council of Scientific and Industrial Research

Madhu Dikshit

Anil Kumar

Girish Kumar Jain

Anil Kumar Dwivedi

Varsha Gupta

Prem Prakash

Vishal Singh

Dinesh Kumar Dikshit

Manish Jain

Vivek Khanna

Ankita Misra

Manoj Kumar Barthwal

Rabi Sankar Bhatta

Tanveer Irshad Siddiqui

Anil Kumar Saxena

Zeeshan Fatima

Stuti Gaur

Anshuman Dixit

Zahid Ali

William Rascan Surin

Kapil Kappor

Kanta Bhutani

Mohammed Salim Ansari

Chiral 1-(4-methylphenylmethyl)-5-oxo-{N-[(3-t-butoxycarbonyl-aminomethyl)]-piperidin-1-yl}-pyrrolidine-2-carboxamides as inhibitors of collagen induced platelet activation and adhesion. The present invention provides chiral (2S)-1-(4-methylphenylmethyl)-5-oxo-(3S)-{N-[(3-t-butoxycarbonyl aminomethyl)]-piperidin-1-yl}-pyrrolidine-2-carboxamide, and (2S)-1-(4-methylphenylmethyl)-5-oxo-(3R)-{N-[(3-t-butoxycarbonyl amino methyl)]-piperidin-1-yl}-pyrrolidine-2-carboxamide of formula 6 and 7 respectively. The present invention also relates to use of these moieties as inhibitors of collagen induced platelet adhesion and aggregation mediated through collagen receptors. The present invention provides a process for preparation of chiral carboxamides of formula 6 and 7 using the process which has advantage to avoid any racemization at the a-carboxylic center, during N-alkylation. The reagent LiHMDS is used at low temperatures to furnish methyl N-(p-methylphenylmethyl)1pyroglutamate in good chiral purity. 

Chiral 1-(4-methylphenylmethyl)-5-oxo-{N-[(3-t-butoxycarbonyl-aminomethyl)]-piperidin-1-yl)-pyrrolidine as inhibitors of collagen induced platelet activation and adhesion

Chiral 1-(4-methylphenylmethyl)-5-oxo-{N-[(3-t-butoxycarbonyl-aminomethyl)]-piperidin-1-yl}-pyrrolidine-2-carboxamides as inhibitors of collagen induced platelet activation and adhesion The present invention provides chiral (2S)-1-(4-methyl-phenylmethyl)-5-oxo-(3S)&#x2014;{N-[(3-t-butoxycarbonyl aminomethyl)]-piperidin-1-yl}-pyrrolidine-2-carboxamide, and (2S)-1-(4-methylphenylmethyl)-5-oxo-(3R)&#x2014;{N-[(3-t-butoxycarbonyl amino methyl)]-piperidin-1-yl}-pyrrolidine-2-carboxamide of formula 6 and 7 respectively. The present invention also relates to use of these moieties as inhibitors of collagen induced platelet adhesion and aggregation mediated through collagen receptors. The present invention provides a process for preparation of chiral carboxamides of formula 6 and 7 using the process which has advantage to avoid any racemization at the a-carboxylic center, during N-alkylation. The reagent LiHMDS is used at low temperatures to furnish methyl N-(p methylphenylmethyl)lpyroglutamate in good chiral purity. 

Chiral 1-(4-methylphenylmethyl)-5-OXO-{N-[3-T-butoxycarbonyl-aminomethyl)]-piperidin-1-yl-pyrrolidine-2-carboxamides as inhibitors of collagen induced platelet activation and adhesion

The present invention relates to antithrombotic compounds 2-alkyl aryl sulphonyl-1,2,3,4-tetrahydro-9H-pyrido(3,4-b)indole-3-carboxylic acid esters/amides, pharmaceutically acceptable salts and compositions thereof to be used in the treatment of intravascular thrombosis such as myocardial ischemia and stroke. The compound has the following general structure wherein R represents methyl ester or amide and Rrepresents alkyl, aryl and heteroaryl moiety.

2-Alkyl/aryl sulphonyl-1,2,3,4-tetrahydro-9H-pyrido (3,4-b) indole-3-carboxylic acid esters/amides useful as antithrombotic agents

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Lucknow, India

Madhu Dikshit