Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Arava Veera Reddy0
Samjuddin Md Md0
Jasti Venkateswarlu0
Chinnapillai Rajendiran0
Date of Patent
June 10, 2008
Patent Application Number
11478552
Date Filed
June 29, 2006
Patent Primary Examiner
Patent 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.
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