Patents by Inventor Shantanu De

Shantanu De 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 rosuvastatin
    Patent number: 7566782
    Abstract: The present invention relates to a process for the preparation of rosuvastatin calcium, a promising new HMG-CoA reductase inhibitor.
    Type: Grant
    Filed: December 10, 2002
    Date of Patent: July 28, 2009
    Assignee: Ranbaxy Laboratories Limited
    Inventors: Yatendra Kumar, Hashim Nizar Poovanathil Nagoor Meeran, Shantanu De, Mohammad Rafeeq, Swargam Sathyanarayana
  • SALTS OF HMG-COA REDUCTASE INHIBITORS AND USE THEREOF
    Publication number: 20090036680
    Abstract: The present invention relates to salts of HMG CoA reductase inhibitors, and in particular, rosuvastatin amine salts and their use as intermediates in the preparation of rosuvastatin calcium.
    Type: Application
    Filed: January 19, 2005
    Publication date: February 5, 2009
    Applicant: RANBAXY LABORATORIES LIMITED
    Inventors: Yatendra Kumar, Mohammad Rafeeq, Shantanu De, Swargam Sathyanarayana
  • Novel Processes for Preparing Amorphous Rosuvastatin Calcium and a Novel Polymorphic Form of Rosuvastatin Sodium
    Publication number: 20080234302
    Abstract: Provided are processes for preparing amorphous rosuvastatin calcium from crystalline rosuvastatin calcium by simple precipitation processes. Also provided is a novel polymorphic form of rosuvastatin sodium, processes for preparing thereof and pharmaceutical compositions thereof.
    Type: Application
    Filed: September 20, 2005
    Publication date: September 25, 2008
    Inventors: Mohammad Rafeeq, Shantanu De, Swargam Sathyanarayana, Yatendra Kumar
  • Process for the preparation of amorphous rosuvastatin calcium
    Publication number: 20070191318
    Abstract: The invention relates to processes for the preparation of amorphous rosuvastatin calcium. More particularly, it relates to the preparation of pure amorphous rosuvastain calcium and pharmaceutical compositions that include the pure amorphous rosuvastatin calcium. The invention also relates to use of said compositions for treating hyperlipidemia, hypercholesterolemia, and atherosclerosis. Formula (I).
    Type: Application
    Filed: October 22, 2004
    Publication date: August 16, 2007
    Inventors: Yatendra Kumar, Mohammad Rafeeq, Shantanu De, Swargam Sathyanarayana
  • Process for the preparation of rosuvastatin
    Publication number: 20060149065
    Abstract: The present invention relates to a process for the preparation of rosuvastatin calcium, a promising new HMG-CoA reductase inhibitor.
    Type: Application
    Filed: December 10, 2002
    Publication date: July 6, 2006
    Inventors: Yatendra Kumar, Hashim Nizar Poovanathil Neeran, Shantanu De, Mohammed Rafeeq, Swargam Sathyanarayana
  • Process for the preparation of rosuvastatin
    Publication number: 20050222415
    Abstract: The present invention relates to a cost effective and industrially advantageous process for the preparation of 4-4(fluorophenyl)-6-isopropyl-2-(N-methyl-N-methylsulphonylamino)-5-pyrimidinecarboxaldehyde, referred to here as pyrimidine aldehyde of structural Formula I and to the use of this compound as intermediate for the preparation of rosuvastatin.
    Type: Application
    Filed: May 21, 2003
    Publication date: October 6, 2005
    Inventors: Yatendra Kumar, Shantanu De, Mohammad Rafeeq, Hashim Nizar Poovanathil Meeran, Swargam Sathyanarayana
  • Process for the preparation of benazepril
    Patent number: 6919450
    Abstract: The present invention relates to an improved process for the preparation of trifluoromethanesulfonic ester of ethyl (R)-2-hydroxy-4-phenylbutyrate, referred to here as triflate in structural Formula I, and to the use of this compound as intermediate for the preparation of ACE (Angiotensin Converting Enzyme) inhibitor, benazepril.
    Type: Grant
    Filed: March 14, 2002
    Date of Patent: July 19, 2005
    Assignee: Ranbaxy Laboratories Limited
    Inventors: Rajest Kumar Thaper, Yatendra Kumar, Shantanu De, S.M. Dileep Kumar
  • Process for the preparation of benazepril
    Publication number: 20040152889
    Abstract: The present invention relates to an improved process for the preparation of trifluoromethanesulfonic ester of ethyl (R)-2-hydroxy-4-phenylbutyrate, referred to here as triflate in structural Formula I, and to the use of this compound as intermediate for the preparation of ACE (Angiotensin Converting Enzyme) inhibitor, benazepril.
    Type: Application
    Filed: March 30, 2004
    Publication date: August 5, 2004
    Inventors: Rajest Kumar Thaper, Yatendra Kumar, Shantanu De, S M Dileep Kumar