Patents by Inventor Padi Pratap Reddy

Padi Pratap Reddy 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 PREPARING IRBESARTAN
    Publication number: 20090286990
    Abstract: A process for preparing irbesartan comprises pentanoylation of cycloleucine in the presence of sodium hydroxide to form n-pentanoyl cycloleucine, condensing this product with 2-(4-aminomethyl phenyl) benzonitrile using dicyclohexyl carbodiimide and 1-hydroxy benzotriazole as a catalyst to form the 4-(&quest-N-pentanoyl amino) cyclopentamido methyl-2?-cyano biphenyl compound, and then cyclizing using trifluoroacetic acid in the presence of an aromatic solvent to form cyano irbesartan. Cyano irbesartan is converted to irbesartan by reaction with tributyltin chloride and sodium azide in the presence of an aromatic solvent.
    Type: Application
    Filed: May 20, 2005
    Publication date: November 19, 2009
    Inventors: Reguri Buchi Reddy, Sunkari Sudhakar, Chaganti Sridhar, Somisetti Narender Rao, Sundaram Venkataraman, Padi Pratap Reddy, Bollikonda Satyanarayana