New Synthesis of Donepezil Through Palladium‐Catalyzed Hydrogenation Approach
摘要:
A new, economical, and efficient process has been developed for large-scale synthesis of donepezil 1, an anti-Alzheimer's drug. The process involves palladium-catalyzed hydrogenation of (2E)-5,6-dimethoxy-2-(pyridin-4-ylmethylene)indan-1-one 6 to provide 5,6-dimethoxy-2-(piperidin-4-ylmethyl)indan-1-one 8 as a key step.
[EN] CRYSTALLINE FORM OF DONEPEZIL HYDROCHLORIDE<br/>[FR] FORME CRISTALLINE D'HYDROCHLORURE DE DONEPEZIL
申请人:REDDYS LAB LTD DR
公开号:WO2006015338A2
公开(公告)日:2006-02-09
A process for preparing crystalline form I of donepezil hydrochloride comprises: a) condensing 5,6-dimethoxy-2-piperidin-4-yl-methyl-indan-1-one with benzyl bromide and reacting a condensation product with hydrobromic acid to form donepezil hydrobromide; and b) hydrolyzing donepezil hydrobromide, followed by reacting with aqueous hydrochloric acid.
New Synthesis of Donepezil Through Palladium‐Catalyzed Hydrogenation Approach
作者:Chandrashekar R. Elati、Naveenkumar Kolla、Subrahmanyeswara Rao Chalamala、Pravinchandra J. Vankawala、Venkataraman Sundaram、Himabindu Vurimidi、Vijayavitthal T. Mathad
DOI:10.1080/00397910500334231
日期:2006.2.1
A new, economical, and efficient process has been developed for large-scale synthesis of donepezil 1, an anti-Alzheimer's drug. The process involves palladium-catalyzed hydrogenation of (2E)-5,6-dimethoxy-2-(pyridin-4-ylmethylene)indan-1-one 6 to provide 5,6-dimethoxy-2-(piperidin-4-ylmethyl)indan-1-one 8 as a key step.