Patents by Inventor Thottappillil Ravindranathan

Thottappillil Ravindranathan 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 beta hydroxy-delta lactone using novel intermediates
    Patent number: 6417374
    Abstract: The present invention relates to a process for the preparation of optically active 6-hydroxymethyl-4-(tert-butyldimethylsilyloxy)-(4R,6S)-tetrahydro-2H-2-pyranone(&bgr;-Hydroxy-&dgr;-lactone) an important intermediate in the synthesis of biologically active drugs e.g. compactin, atorvastatin, fluvastatin, cholesterol lowering drugs.
    Type: Grant
    Filed: February 15, 2001
    Date of Patent: July 9, 2002
    Assignee: Council of Scientific & Industrial Research
    Inventors: Sandeep Raghunath Ghorpade, Uttam Ramrao Kalkote, Subhash Prataprao Chavan, Sunil Ramchandra Bhide, Thottappillil Ravindranathan
  • Process for the preparation of &bgr; hydroxy-&dgr; lactone using novel intermediates
    Patent number: 6388097
    Abstract: The present invention relates to a process for the preparation of optically active 6-hydroxymethyl-4-tert-butyldimethylsilyloxy)-(4S,6R)-tetrahydro-2H-2-pyranone (&bgr; Hydroxy &dgr; Lacone) and the compound 3-oxo-5-(tert.
    Type: Grant
    Filed: February 15, 2001
    Date of Patent: May 14, 2002
    Assignee: Council of Scientific & Industrial Research
    Inventors: Sandeep Raghunath Ghorpade, Uttam Ramrao Kalkote, Subhash Prataprao Chavan, Sunil Ramchandra Bhide, Thottappillil Ravindranathan
  • Process for the C-C bond forming reaction using solid acid catalysts
    Patent number: 5932752
    Abstract: A process for the preparation of organic compounds through C--C bond forming reaction which comprises reacting a diene with a dienophile in the presence of solid acid based on either yttrium, scandium or lanthanum supported on metal oxide supports such as oxides of zirconium or tin or titanium or iron oxide modified by sulphation as catalysts for a period ranging from 5 to 48 hours and recovering the reaction products from the reaction mixture by filtration and removal of the solvent by evaporation followed by column chromatography.
    Type: Grant
    Filed: May 29, 1996
    Date of Patent: August 3, 1999
    Assignee: Council of Scientific and Industrial Research
    Inventors: Alive Keshavaraja, Vishnumurthy Ramachandra Hegde, Pradeep Kumar, Sooryakant Ganesh Hegde, Arumugamangalam Venkataraman Ramaswamy, Thottappillil Ravindranathan