Process for preparing a new 1.alpha.,25-dihydroxy-...

C - Chemistry – Metallurgy – 07 – C

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260/628.4

C07C 401/00 (2006.01)

Patent

CA 1140155

PRECIS DE LA DIVULGATION: La présente invention a pour objet un procédé de préparation d'un nouveau dérivé du 1.alpha.,25-dihydroxy cholécal- ciférol à savoir le monohydrate du 1.alpha.,25-dihydroxy cholécal- ciférol, à partir du 1.alpha.,25-dihydroxy cholécalciférol ou d'un solvate. Ce procédé est caractérisé en ce que l'on dissout le 1.alpha.,25-dihydroxy cholécalciférol, ou l'un de ses solvates, dans un solvant approprié, ajoute de l'eau à la solution obtenue et obtient ainsi le produit de l'invention sous forme cristalline. Le produit obtenu présente de remarquables propriétés vitaminiques.

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