Patents by Inventor Surendra B. Bhatt

Surendra B. Bhatt 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 preparation of 2-[(diphenylmethyl) thio] acetamide
    Patent number: 7186860
    Abstract: Process for the preparation of 2-[(diphenylmethyl)thioacetamide, an intermediate for the preparation of Modafinil which is a CNS stimulant and used for the treatment of narcolepsia. The process comprises reacting 2-[(diphenylmethyl)thio]acetic acid with alcohols, in presence of catalytic amount of inorganic acid or organic acid at reflux temperature of alcohol to obtain corresponding ester which is reacted with ammonia to give 2-[(diphenylmethyl)thio]acetamide. If desired 2-[(diphenylmethyl)thioacetamide thus produced is reacted with hydrogen peroxide to produce Modafinil.
    Type: Grant
    Filed: January 30, 2004
    Date of Patent: March 6, 2007
    Assignee: Alembic Limited
    Inventors: Surendra B. Bhatt, Jiten R. Patel, Dinesh Panchasara, Hetal R. Shah, Keshav Deo, Vinod Kumar Kansal