The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 06, 2007
Filed:
Jan. 30, 2004
Surendra B. Bhatt, Vadodara, IN;
Jiten R. Patel, Vadodara, IN;
Dinesh Panchasara, Vadodara, IN;
Hetal R. Shah, Vadodara, IN;
Keshav Deo, Vadodara, IN;
Vinod Kumar Kansal, Vadodara, IN;
Surendra B. Bhatt, Vadodara, IN;
Jiten R. Patel, Vadodara, IN;
Dinesh Panchasara, Vadodara, IN;
Hetal R. Shah, Vadodara, IN;
Keshav Deo, Vadodara, IN;
Vinod Kumar Kansal, Vadodara, IN;
Alembic Limited, Gujarat, IN;
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.