Production of polymorphic forms i and ii of finasteride by...

Details Production of polymorphic forms i and ii of finasteride by... Production of polymorphic forms i and ii of finasteride by...

C - Chemistry, Metallurgy

07

J

C07J 73/00 (2006.01) C07J 75/00 (2006.01)

Patent

CA 2389666

Polymorphic Form (I) finasteride is prepared by first forming a substantially insoluble complex of finasteride and a Group (I) or Group (II) metal salt, such as lithium bromide, and then dissociating the complex by dissolving away the salt component with water, so as to obtain substantially pure Form (I) polymorphic crystalline finasteride.

L'invention concerne une forme polymorphe (I) de finastéride préparée par formation préalable d'un complexe sensiblement insoluble de finastéride et d'un sel d'un métal de groupe (I) ou de groupe (II), tel que le bromure de lithium, puis par dissociation du complexe obtenue en dissolvant le composant salin avec de l'eau, de manière à obtenir une forme polymorphe (I) crystalline de finastéride sensiblement pure.

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