Novel polymorphs of the potassium salt of atorvastatin

C - Chemistry – Metallurgy – 07 – D

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C07D 207/40 (2006.01)

Patent

CA 2577848

Novel polymorphs Forms I, II and III of the potassium salt of Atorvastatin, (.beta.R,.delta.R)-2-(p~fluorophenyl)-( .beta.,.delta.-dihydroxy-5-isopropyl-3- phenyl-4-(phenylcarbamoyl)pyrrole-l -heptanoic acid, are obtained directly by precipitation of the potassium salt of Atorvastatin with ethanol (polymorph I), with 1-propanol (polymorph II) and by recrystallisation of polymorph I from 2-~propanol (polymorph III).

La présente invention concerne de nouvelles formes polymorphes I, II et III du sel de potassium de l~Atorvastatine, l~acide (.beta.R,.delta.R)-2-(p-fluorophényl)-( .beta.,.delta.-dihydroxy-5-isopropyl-3-phényl-4-(phénylcarbamoyl)pyrrole-1-heptanoïque, obtenues directement par précipitation du sel de potassium de l~Atorvastatine par de l~éthanol (polymorphe I), par du 1-propanol (polymorphe II) et par recristallisation du polymorphe I dans du 2-propanol (polymorphe III).

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