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:
Jun. 10, 2008
Filed:
Jun. 29, 2006
Jasti Venkateswarlu, Andhra Pradesh, IN;
Arava Veera Reddy, Hyderabad, IN;
Chinnapillai Rajendiran, Hyderabad, IN;
Samjuddin MD MD, Hyderabad, IN;
Jasti Venkateswarlu, Andhra Pradesh, IN;
Arava Veera Reddy, Hyderabad, IN;
Chinnapillai Rajendiran, Hyderabad, IN;
Samjuddin Md Md, Hyderabad, IN;
Suven Life Sciences, Banjara Hills, Hyderabad, IN;
Abstract
The invention disclosed in this application relates to an improved process for the preparation of Entacapone. In one embodiment the process involves: (i) reacting a 3-alkoxy-4-hydroxy-5-nitrobenzadehyde with N,N-diethylaminocyanoacetamide in the presence of a mild acid catalyst and a solvent, to provide a 3-O-alkylated Entacapone, and treating the 3-O-alkylated Entacapone with an acid catalyst in the presence of an organic base to provide Entacapone.