Selective processes for fosinopril polymorphs

Details Selective processes for fosinopril polymorphs Selective processes for fosinopril polymorphs

C - Chemistry, Metallurgy

07

F

260/325.1

C07F 9/572 (2006.01)

Patent

CA 2034811

Described herein is a process for selectively preparing and interconverting polymorph salts of fosinopril, an antihypertensive agent that inhibits angiotensin converting enzyme. Each polymorph is prepared by mixing an alkali metal carrier, fosinopril, water and a keto and/or hydroxylic solvent and isolating the polymorph formed from the reaction mixture. The less exothermic polymorph A is formed when the water makes up more than about 0.2% of the water and solvents; at about 0.2% or less, the more exothermic polymorph B is formed.

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