Patents by Inventor Prasad Vasudeo Ranade

Prasad Vasudeo Ranade 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 producing enantiomer of amlodipine in high optical purity
    Patent number: 8445688
    Abstract: The present invention relates to a process for preparation of optically pure (S)-amlodipine-L-hemitartrate DMF solvate comprising the steps of treating (R,S) amlodipine base with L-tartaric acid in the presence of dimethyl formamide and a co-solvent. The invention also relates to a process for converting (R) or (S)-amlopidine-L-hemitartrate DMF solvate into their besylates without isolating free chiral amlopidine base after solution.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: May 21, 2013
    Assignee: Emcure Pharmaceuticals Limited
    Inventors: Milind Moreshwar Gharpure, Baburao Manikrao Bhawal, Prasad Vasudeo Ranade, Rajendra Dagadu Deshmukh, Satish Ramanlal Mehta
  • PROCESS FOR PRODUCING ENANTIOMER OF AMLODIPINE IN HIGH OPTICAL PURITY
    Publication number: 20110021783
    Abstract: The present invention relates to a process for preparation of optically pure (S)-amlodipine-L-hemitartrate DMF solvate comprising the steps of treating (R,S) amlodipine base with L-tartaric acid in the presence of dimethyl formamide and a co-solvent. The invention also relates to a process for converting (R) or (S)-amlopidine-L-hemitartrate DMF solvate into their besylates without isolating free chiral amlopidine base after solution.
    Type: Application
    Filed: September 30, 2010
    Publication date: January 27, 2011
    Inventors: Milind Moreshwar GHARPURE, Baburao Manikrao Bhawal, Prasad Vasudeo Ranade, Rajendra Dagadu Deshmukh, Satish Ramanlal Mehta
  • Process for producing enantiomer of amlodipine in high optical purity
    Patent number: 7858801
    Abstract: The present invention relates to a process for preparation of optically pure (S)-amlodipine-L-hemitartrate DMF solvate comprising the steps of treating (R,S) amlodipine base with L-tartaric acid in the presence of dimethyl formamide and a co-solvent. The invention also relates to a process for converting (R) or (S)-amlopidine-L-hemitartrate DMF solvate into their besylates without isolating free chiral amlopidine base after solution.
    Type: Grant
    Filed: October 17, 2005
    Date of Patent: December 28, 2010
    Assignee: Emcure Pharmaceuticals Limited
    Inventors: Milind Moreshwar Gharpure, Baburao Manikrao Bhawal, Prasad Vasudeo Ranade, Rajendra Dagadu Deshmukh, Satish Ramanlal Mehta
  • Process for Producing Enantiomer of Amlodipine in High Optical Purity
    Publication number: 20080262239
    Abstract: The present invention relates to a process for preparation of optically pure (S)-amlodipine-L-hemitartrate DMF solvate comprising the steps of treating (R,S) amlodipine base with L-tartaric acid in the presence of dimethyl formamide and a co-solvent. The invention also relates to a process for converting (R) or (S)-amlopidine-L-hemitartrate DMF solvate into their besylates without isolating free chiral amlopidine base after solution.
    Type: Application
    Filed: October 17, 2005
    Publication date: October 23, 2008
    Inventors: Milind Moreshwar Gharpure, Baburao Manikrao Bhawal, Prasad Vasudeo Ranade, Rajendra Dagadu Deshmukh, Satish Ramanlal Mehta
  • Racemization of optically active 2-substituted phenyl glycine esters
    Patent number: 6812363
    Abstract: A process for preparing racemic mixtures containing nearly equal amounts of stereo isomers of compounds of formula (I), or their salts, by heating an enantiomerically enriched material with thionyl chloride. A required useful enantiomer may thereby be recovered from unwanted mother liquors that would otherwise be otherwise be discarded.
    Type: Grant
    Filed: October 15, 2002
    Date of Patent: November 2, 2004
    Assignee: USV Limited
    Inventors: Krishna K. Maheshwari, Rayaprolu Kodandarama Sarma, Shreerang Vidyadhar Joshi, Anup Ramkrishna Barde, Rajiv Pandurang Sutar, Prasad Vasudeo Ranade
  • Racemization of optically active 2-substituted phenyl glycine esters
    Publication number: 20040073057
    Abstract: A process for preparing racemic mixtures containing nearly equal amounts of stereo isomers of compounds of formula (I), or their salts, by heating an enantiomerically enriched material with thionyl chloride.
    Type: Application
    Filed: October 15, 2002
    Publication date: April 15, 2004
    Inventors: Krishna K. Maheshwari, Rayaprolu Kodandarama Sarma, Shreerang Vidyadhar Joshi, Anup Ramkrishna Barde, Rajiv Pandurang Sutar, Prasad Vasudeo Ranade