Patents by Inventor Venkata Naga Satya Srinivas Kalavagunta

Venkata Naga Satya Srinivas Kalavagunta 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 direct preparation of 5-alkoxy and 5-acyloxy analogues of camptothecins or mappicene ketones
    Patent number: 6872829
    Abstract: A convenient and efficient process for direct preparation of 5-alkoxy and 5-acyloxy analogues of camptothecins (anticancer compounds) and mappicine ketones (antiviral compounds) has been invented by treatment of the parent compounds with alcohols and acids respectively in the presence of ceric ammonium nitrate (CAN) at room temperature. The process is simple, economic and completed within a short period of time.
    Type: Grant
    Filed: December 30, 2002
    Date of Patent: March 29, 2005
    Assignee: Council of Scientific and Industrial Research
    Inventors: Biswanath Das, Purushotham Madhusuda, Venkata Naga Satya Srinivas Kalavagunta
  • Process for the direct preparation of 5-alkoxy and 5-acyloxy analogues of campthothecins or mappicene ketones
    Publication number: 20040127711
    Abstract: A convenient and efficient process for direct preparation of 5-alkoxy and 5-acyloxy analogues of camptothecins (anticancer compounds) and mappicine ketones (antiviral compounds) has been invented by treatment of the parent compounds with alcohols and acids respectively in the presence of ceric ammonium nitrate (CAN) at room temperature. The process is simple, economic and completed within a short period of time.
    Type: Application
    Filed: December 30, 2002
    Publication date: July 1, 2004
    Applicant: Council of Scientific and Industrial Research
    Inventors: Biswanath Das, Madhusudhan Purushotham, Venkata Naga Satya Sriniva Kalavagunta