|Title:||Stable polymorphic form of (E)-N,N-diethyl-2-cyano-3-(3,4-dihydroxy-5-nitrophenyl)acrylamide and the process for its preparation|
|Abstract:||Stable and crystallographically essentially pure polymorphic form A of (E)-N,N-diethyl-2-cyano-3-(3,4-dihydroxy-5-nitro-phenyl)acrylamide may be prepared by crystallizing crude synthesis product from lower aliphatic carboxylic acid such as formic or acetic acid with a catalytic amount of hydrochloric or hydrobromic acid added. The product is a potent inhibitor of catechol-O-methyl-transferase enzyme (COMT).|
|Inventor(s):||Pippuri; Aino K. (Espoo, FI), Honkanen; Erkki J. (Vantaa, FI), Haarala; Jorma V. (Helsinki, FI)|
|Assignee:||Orion-yhtyma Oy (Espoo, FI)|
Patent Claim Types:|
see list of patent claims
|Compound; Process; Use; Composition;|
|Foriegn Application Priority Data|
|Foreign Country||Foreign Patent Number||Foreign Patent Date|
|United Kingdom||8924838.9||Nov 03, 1989|
|Country||Document Number||Estimated Expiration||Supplementary Protection Certificate||SPC Country||SPC Expiration|
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