Patents Assigned to Centaur Chemicals Pvt Ltd
  • Process for preparation of triazol-benzodiazepine derivatives
    Patent number: 8106189
    Abstract: An improved process for preparation of triazol-benzodiazepine derivatives, such as alprazolam, triazolam, brotizolam and etizolam, is presented. The process comprises a cyclization reaction of compound Formula B in toluene with catalytic amount of p-toluene sulphonic acid to obtain the triazol-benzodiazepine derivative of Formula C: wherein R is, and X is hydrogen or halogen.
    Type: Grant
    Filed: August 19, 2008
    Date of Patent: January 31, 2012
    Assignee: Centaur Chemicals Pvt Ltd
    Inventors: Anil M. Naik, Shrikant D. Sawant, Girish A. Kavishwar, Smita G. Kavishwar
  • PROCESS FOR PREPARATION OF TRIAZOL-BENZODIAZEPINE DERIVATIVES
    Publication number: 20090093629
    Abstract: An improved process for preparation of triazol-benzodiazepine derivatives, such as alprazolam, triazolam, brotizolam and etizolam, is presented. The process comprises a cyclization reaction of compound Formula B in toluene with catalytic amount of p-toluene sulphonic acid to obtain the triazol-benzodiazepine derivative of Formula C: wherein R is, and X is hydrogen or halogen.
    Type: Application
    Filed: August 19, 2008
    Publication date: April 9, 2009
    Applicant: Centaur Chemicals Pvt Ltd
    Inventors: Anil M. Naik, Shrikant D. Sawant, Girish A. Kavishwar, Smita G. Kavishwar