Patents by Inventor Subas M. Sayka

Subas M. Sayka 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).

  • Efficient synthesis of 5-heteroatom-containing-pyrazoles
    Publication number: 20040210052
    Abstract: An efficient synthesis of sulfonyl pyrazoles of formula I: 1
    Type: Application
    Filed: April 22, 2004
    Publication date: October 21, 2004
    Inventors: Andrei Shavnya, Subas M. Sayka, Martha L. Minich, Bryson Rast
  • Efficient synthesis of 5-heteroatom-containing -pyrazoles
    Patent number: 6794512
    Abstract: An efficient synthesis of sulfonyl pyrazoles of formula I: wherein the ring of the formula (R5)-A-(SOmR4), m, R1 through R9 are as defined in the specification, comprising reacting a compound of formula II: wherein the ring of the formula (R5)-A-(SOmR4), m R1 through R9 are as defined above and wherein R10 is halo, (C1-C6)alkyl-SO3—, (C6-C10)aryl-SO3—, (C1-C6)alkyl-SO2—, or (C6-C10)aryl-SO2—; wherein each of said (C1-C6)alkyl component of said (C1-C6)alkyl-SO3— and (C1-C6)alkyl-SO2— radicals may optionally be substituted on any carbon atom by one to six fluoro substituents per (C1-C6)alkyl component; with a compound of formula R3—H, wherein R3 is as defined above, in the presence of a fluoride containing salt and in the presence of a solvent.
    Type: Grant
    Filed: November 1, 2002
    Date of Patent: September 21, 2004
    Assignee: Pfizer, Inc.
    Inventors: Andrei Shavnya, Subas M. Sayka, Martha L. Minich, Bryson Rast
  • Heterocyclo-alkylsulfonyl pyrazoles
    Publication number: 20030149026
    Abstract: The present invention relates to heterocyclo alkylsulfonyl pyrazoles of the formula I: 1
    Type: Application
    Filed: November 1, 2002
    Publication date: August 7, 2003
    Inventors: Subas M. Sayka, Martha L. Minich
  • Efficient synthesis of 5-heteroatom-containing -pyrazoles
    Publication number: 20030139407
    Abstract: An efficient synthesis of sulfonyl pyrazoles of formula I: 1
    Type: Application
    Filed: November 1, 2002
    Publication date: July 24, 2003
    Inventors: Andrei Shavnya, Subas M. Sayka, Martha L. Minich, Bryson Rast