Patents by Inventor Mayank G. Dave

Mayank G. Dave 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 PREPARING AN INTERMEDIATE OF SITAGLIPTIN VIA ENZYMATIC CONVERSION
    Publication number: 20130289276
    Abstract: The invention provides a process for preparing 3-hydroxy-1-(3-(trifluoromethyl)-5,6-dihydro-[1,2,4]triazolo[4,3-a]pyrazin-7(8H)-yl)-4-(2,4,5-trifluorophenyl)butan-1-one (Formula I), into its racemic (R/S) form or any of its optically active (S) or (R) forms or enantiomeric excess mixture of any of the forms comprising: a) reacting 4-oxo-4-[3-(trifluoromethyl)-5,6-dihydro[1,2,4]triazolo[4,3-a]pyrazin-7(8H)-yl]-1-(2,4,5-trifluorophenyl)butan-2-one of formula (III) with a suitable oxidoreductase enzymes or its suitable variants in the presence of suitable conditions and co-factor; and b) isolating 3-hydroxy-1-(3-(trifluoromethyl)-5,6-dihydro-[1,2,4]triazolo[4,3-a]pyrazin-7(8H)-yl)-4-(2,4,5-trifluorophenyl)butan-1-one, into its racemic (R/S) form or any of its optically active (S) or (R) forms or enantiomeric excess mixture of any of the forms.
    Type: Application
    Filed: October 10, 2011
    Publication date: October 31, 2013
    Applicant: CADILA HEALTHCARE LIMITED
    Inventors: Sanjeev Kumar Mendirata, Bipin Pandey, Rupal Joshi, Umang Trivedi, Mayank G. Dave, Himanshu M. Kothari, Bhavin Shukla
  • Polymorphs and amorphous form of (S)-(+)-clopidogrel bisulfate
    Patent number: 7872019
    Abstract: The present invention relates to new polymorphs of S-(+)-Clopidogrel bisulfate and a process for preparing the same.
    Type: Grant
    Filed: March 12, 2003
    Date of Patent: January 18, 2011
    Assignee: Cadila Healthcare Limited
    Inventors: Braj B. Lohray, Vidya B. Lohray, Bipin Pandey, Mayank G. Dave
  • POLYMORPH AND AMORPHOUS FORM OF (S)-(+)-CLOPIDOGREL BISULFATE
    Publication number: 20110003846
    Abstract: The present invention relates to new polymorphs of S-(+)-Clopidogrel bisulfate and a process for preparing the same.
    Type: Application
    Filed: April 14, 2010
    Publication date: January 6, 2011
    Applicant: Cadila Healthcare Limited
    Inventors: Braj B. LOHRAY, Vidya B. Lohray, Bipin Pandey, Mayank G. Dave