Patents by Inventor Prakash NARSING CHAVAN

Prakash NARSING CHAVAN has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for the preparation of intermediate for the preparation of oseltamivir phosphate
    Patent number: 9522922
    Abstract: The present 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.
    Type: Grant
    Filed: October 7, 2014
    Date of Patent: December 20, 2016
    Assignee: Council of Scientific and Industrial Research
    Inventors: Subhash Prataprao Chavan, Prakash Narsing Chavan
  • A PROCESS FOR THE PREPARATION OF INTERMEDIATE FOR THE PREPARATION OF OSELTAMIVIR PHOSPHATE
    Publication number: 20160222029
    Abstract: The present 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.
    Type: Application
    Filed: October 7, 2014
    Publication date: August 4, 2016
    Applicant: Council of Scientific and Industrial Research
    Inventors: Subhash PRATAPRAO CHAVAN, Prakash NARSING CHAVAN