Patents Assigned to Divi's Laboratories, Ltd.
  • Resolution of 1-(4-methoxybenzyl)-octahydro-isoquinoline
    Patent number: 8148527
    Abstract: The resolution of racemic 1-(4-methoxybenzyl)-octahydro-isoquinoline, a key intermediate in the synthesis of the antitussive agent dextromethorphan, is reported using (R)-2-(6-methoxy-2-naphthyl) propionic acid in good yields. The resolving agent and the undesired isomer of the octahydro-isoquinoline have been recovered in good yield.
    Type: Grant
    Filed: March 11, 2011
    Date of Patent: April 3, 2012
    Assignee: Divi's Laboratories, Ltd.
    Inventors: Murali Krishna Prasad Divi, Srinivas Rao Pendyala, Lavu Venkata Ramana
  • Process for the preparation of irbesartan
    Patent number: 8080670
    Abstract: The present invention relates to a process for the preparation of 2-butyl-3-[[2?-(1H-tetrazol-5-yl)[1,1?-biphenyl]-4-yl]-1,3-diazaspiro[4,4]non-1-en-4-one by reaction of the corresponding nitrile with sodium azide and piperazine or its acid salt.
    Type: Grant
    Filed: June 21, 2010
    Date of Patent: December 20, 2011
    Assignee: Divi's Laboratories, Ltd.
    Inventors: Murali Krishna Prasad Divi, Mysore Aswatha Narayana Rao, Surendra Kalyan Nuthi, Yugandar Phaniram Bandaru
  • PROCESS FOR THE PREPARATION OF IRBESARTAN
    Publication number: 20110275828
    Abstract: The present invention relates to a process for the preparation of 2-butyl-3-[[2?-(1H-tetrazol-5-yl)[1,1?-biphenyl]-4-yl]-1,3-diazaspiro[4,4]non-1-en-4-one by reaction of the corresponding nitrile with sodium azide and piperazine or its acid salt.
    Type: Application
    Filed: June 21, 2010
    Publication date: November 10, 2011
    Applicant: DIVI'S LABORATORIES LTD.
    Inventors: Murali Krishna Prasad DIVI, Mysore Aswatha Narayana RAO, Surendra Kalyan NUTHI, Yugandar Phaniram BANDARU
  • Process for the preparation of 5-benzyloxy-2-(4-benzyloxyphenyl)-3-methyl-1H-indole
    Patent number: 7968732
    Abstract: The present invention is related to a process for the preparation of 5-benzyloxy-2-(4-benzyloxyphenyl)-3-methyl-1H-Indole (formula-1, a useful intermediate for the synthesis of bazedoxifene) using 4-benzyloxy propiophenone and 4-benzyloxy phenyl hydrazine hydrochloride.
    Type: Grant
    Filed: November 18, 2010
    Date of Patent: June 28, 2011
    Assignee: Divi's Laboratories, Ltd.
    Inventors: Murali Krishna Prasad Divi, Bolineni Nageswara Rao, Dandu Venkata Suresh