Patents

IN319972: Stereospecific and proficient synthesis of seven membered sulfide: its application for tamiflu synthesis

The invention discloses an economic, simple, azide and aziridine complexity free process for the synthesis of osletamivir phosphate (Tamiflu) by stereospecific amidoalkylation of imidazothiazolone from easily available L-cysteine via Ramberg-Backlund reaction and Sharpless-Reich protocol.

Filing Date: 04-10-2013

Issue Date: 06-09-2019

Applicant: CSIR-National Chemical Laboratory (CSIR-NCL), Pune

Patent No: IN319972

Application No: 2956/DEL/2013

Inventor(s): Subhash Prataprao Chavan; Prakash; Narsing Chavan

IPC Classification: C07D

Country: India

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