Patents by Inventor Tirunahari Pavan Kumar

Tirunahari Pavan Kumar 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).

  • (2R, 3S, 22R, 23R)-2,3,22,23-tetrahydroxy-24-ethyl-.beta.-homo-7-oxa-5.alpha.-cholesta n-6-one and a process for preparing the same
    Patent number: 6090952
    Abstract: The invention discloses a process for the preparation of a compound, having molecular formula C.sub.29 H.sub.50 O.sub.6 and isomeric structural formulae (2R, 3S, 22R, 23R) -2, 3, 22, 23 -tetrahydroxy-24- ethyl-.beta.-homo-7-oxa -5.alpha.- cholestan-6- one and (2R, 3S, 22S, 23S) -2, 3, 22-23-tetrahydroxy-24- ethyl-.beta.-homo-7-oxa-5.alpha.-cholestan -6- one in a ratio 69:31, both of which are members of a new class of steroidal phytohormones.
    Type: Grant
    Filed: March 30, 1998
    Date of Patent: July 18, 2000
    Assignee: Council of Scientific & Industrial Research
    Inventors: Braja Gopal Hazra, Padmakar Laxman Joshi, Tirunahari Pavan Kumar
  • (2R,3S,24S)-2,3-diacetoxy-22,23-epoxy -24-ethyl-.beta.-homo-7-oxa-5.alpha.-cholestan-6-one and a process for preparing the same
    Patent number: 6008380
    Abstract: The present invention relates to a novel compound namely (2R,3S,24S)-2,3-diacetoxy-22,23-epoxy-24-ethyl-.beta.-homo-7-oxa-5.alpha.- cholestan-6-one and a process for the preparation thereof. The said compound is represented by the structural formula ##STR1## The said compound is a crucial intermediate in the synthesis of honobrassinolide having molecular formula C.sub.29 H.sub.50 O.sub.6.
    Type: Grant
    Filed: March 30, 1998
    Date of Patent: December 28, 1999
    Assignee: Council of Scientific & Industrial Research
    Inventors: Braja Gopal Hazra, Padmakar Laxman Joshi, Tirunahari Pavan Kumar