Patents by Inventor Sastry Kunda

Sastry Kunda 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).

  • Processes for preparation of 9,11- epoxy steroids and intermediates useful therein
    Publication number: 20020016455
    Abstract: Multiple novel reaction schemes, novel process steps and novel intermediates are provided for the synthesis of epoxymexrenone and other compounds of Formula I 1
    Type: Application
    Filed: April 3, 2001
    Publication date: February 7, 2002
    Inventors: John S. Ng, Ping T. Wang, Julio A. Baez, Chin Liu, Dennis K. Anderson, Jon P. Lawson, Bernhard Erb, Joseph Wieczorek, Gennaro Mucciariello, Fortunato Vanzanella, Sastry A. Kunda, Leo J. Letendre, Mark J. Pozzo, Yuen-Lung L. Sing, Edward E. Yonan
  • 5&bgr;-cyano-substituted steroid compounds
    Patent number: 6335441
    Abstract: Novel 5&bgr;-cyano steroid compounds including compounds of Formula VII: wherein A—A, B—B, R3, R8 and R9 are as defined in the specification.
    Type: Grant
    Filed: May 30, 2000
    Date of Patent: January 1, 2002
    Assignee: G.D. Searle & Co.
    Inventors: John S. Ng, Chin Liu, Dennis K. Anderson, Jon P. Lawson, Bernhard Erb, Joseph Wieczorek, Sastry A. Kunda, Leo J. Letendre, Mark J. Pozzo, Yuen-Lung L. Sing, Edward E. Yonan
  • Processes for preparation of 9, 11-epoxy steroids and intermediates useful therein
    Patent number: 6331622
    Abstract: A process for the formation of an epoxy compound comprising contacting a substrate compound having an olefinic double bond with a peroxide compound in the presence of a peroxide activator, said peroxide activator corresponding to the formula: where Ro is a substituent having an electron withdrawing strength not less than that of monochloromethyl.
    Type: Grant
    Filed: February 8, 1999
    Date of Patent: December 18, 2001
    Assignee: G.D. Searle & Co.
    Inventors: John S. Ng, Ping T. Wang, Julio A. Baez, Chin Liu, Dennis K. Anderson, Jon P. Lawson, Bernhard Erb, Joseph Wieczorek, Gennaro Mucciariello, Fortunato Vanzanella, Sastry A. Kunda, Leo J. Letendre, Mark J. Pozzo, Yuen-Lung L. Sing, Edward E. Yonan
  • Keto-Substituted Steroid Compounds
    Patent number: 6258946
    Abstract: Multiple novel reaction schemes, novel process steps and novel intermediates are provided for the synthesis of epoxymexrenone, useful as a diuretic, and other compounds of Formula I wherein the variables are as defined by the specification.
    Type: Grant
    Filed: May 30, 2000
    Date of Patent: July 10, 2001
    Assignee: G. D. Searle & Co.
    Inventors: John S. Ng, Ping T. Wang, Julio A. Baez, Chin Liu, Dennis K. Anderson, Jon P. Lawson, Bernhard Erb, Joseph Wieczorek, Gennaro Mucciariello, Fortunato Vanzanella, Sastry A. Kunda, Leo J. Letendre, Mark J. Pozzo, Yuen-Lung L. Sing, Edward E. Yonan
  • Processes for preparation of 9,11-epoxy steroids and intermediates useful therein
    Patent number: 6180780
    Abstract: Multiple reaction schemes, process steps and intermediates are provided for the synthesis of epoxymexrenone, useful as a diuretic, and other compounds of Formula I wherein the variables are as defined by the specification.
    Type: Grant
    Filed: February 9, 1999
    Date of Patent: January 30, 2001
    Assignee: G.D. Searle & Co.
    Inventors: John S. Ng, Ping T. Wang, Julio A. Baez, Chin Liu, Dennis K. Anderson, Jon P. Lawson, Bernhard Erb, Joseph Wieczorek, Gennaro Mucciariello, Fortunato Vanzanella, Sastry A. Kunda, Leo J. Letendre, Mark J. Pozzo, Yuen-Lung L. Sing, Edward E. Yonan
  • Synthesis of benzo fused heterocyclic sulfonyl chlorides
    Patent number: 6140505
    Abstract: A process for preparing a benzo fused heterocyclic sulfonyl halide comprising reacting a benzo fused heterocyclic compound with an SO.sub.3 complex in the presence of a water immiscible, non-reactive solvent, at a temperature of from about 0.degree. C. to about 75.degree. C., cooling, if necessary, to a temperature of from about -25.degree. C. to about 65.degree. C. and then adding oxalyl halide.
    Type: Grant
    Filed: May 19, 1998
    Date of Patent: October 31, 2000
    Assignee: G. D. Searle & Co.
    Inventors: Sastry A. Kunda, Leo J. Letendre, Gary A. De Crescenzo
  • Processes for preparation of 9,11-epoxy steroids and intermediates useful therein
    Patent number: 5981744
    Abstract: Multiple reaction schemes, process steps and intermediates are provided for the synthesis of epoxymexrenone, useful as a diuretic, and other 9,11-epoxy-steroids.
    Type: Grant
    Filed: December 11, 1996
    Date of Patent: November 9, 1999
    Assignee: G. D. Searle and Co.
    Inventors: John S. Ng, Ping T. Wang, Julio A. Baez, Chin Liu, Dennis K. Anderson, Jon P. Lawson, Bernhard Erb, Joseph Wieczorek, Sastry A. Kunda, Leo J. Letendre, Mark J. Pozzo, Yuen-Lung L. Sing, Edward E. Yonan