Preparation of cabergoline form i from a solvate of...

C - Chemistry – Metallurgy – 07 – D

Patent

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C07D 457/06 (2006.01)

Patent

CA 2565440

The present invention discloses a method for preparing cabergoline form I by combining cabergoline and a solvent comprising ethylbenzene to form a solvate and obtaining form I from the solvate. Also disclosed is a method for preparing cabergoline form I by combining cabergoline and a fist solvent to form a solution and additionally including a second solvent to the solution, followed by crystallisation to form cabergoline form I. Further disclosed is a solvate form of cabergoline comprising cabergoline and ethylbenzene and, optionally, n-heptane. (see formula I)

La présente invention concerne un procédé destiné à préparer une cabergoline de forme I par combinaison d'une cabergoline et d'un solvant comprenant de l'éthylbenzène en vue de la formation d'un solvate, puis par obtention de la cabergoline de forme I à partir de ce solvate. L'invention concerne également un procédé destiné à préparer une cabergoline de forme I par combinaison d'une cabergoline et d'un premier solvant en vue de la formation d'une solution, par ajout d'un second solvant dans la solution, puis par cristallisation en vue de la formation d'une cabergoline de forme I. L'invention se rapporte en outre à une forme de solvate de cabergoline comprenant une cabergoline, de l'éthylbenzène et, éventuellement, du n-heptane.

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