Stable polymorphs of (e)-n,n-diethyl-2-cyano-3-(3,4-dihydroxy-5-nitrophenyl)acrylamide

The present invention relates to stable crystalline polymorphic forms C and D of (E)-N,N-diethyl-2-cyan-3-(3,4-dihydroxy-5-nitrophenyl)acrylamide (Entacapone) and their preparation processes. (E)-Entacapone Form C is obtained by condensing 3,4-Dihydroxy-5-nitrobenzaldehyde and N,N-Diethylcyanoacetam...

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Bibliographische Detailangaben

Hauptverfasser:	ZAKIR GAFOOR SHAIKH, RASHID ABDUL REHMAN KHAN, SIDDIQUI MOHAMMED JAWEED MUKARRAM, RAM PRASAD YADAV
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMISTRY METALLURGY ORGANIC CHEMISTRY
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