IMPROVED PROCESS FOR THE PREPARATION OF (1-BENZYL-4-(5,6,- DIMETHOXYIND ANONE-2-YL)METHYLPIPERIDINE) HYDROCHLORIDE-FORM III

摘要

The present invention is directed to an improved industrially viable, cost effective process for manufacturing pure racemic crystalline anhydrous form of (1-benzyl-4-(5,6,- dimethoxyindanone-2yl)methylpiperidine) hydrochloride Form III commonly known as Donepezil hydrochloride with a purity level of greater than 99.9%.