Crystals of penicillin and process for the production thereof

Details Crystals of penicillin and process for the production thereof Crystals of penicillin and process for the production thereof

C - Chemistry, Metallurgy

07

D

C07D 499/18 (2006.01) A61K 31/431 (2006.01) A61P 31/04 (2006.01) C07D 499/00 (2006.01) C07D 499/86 (2006.01) C07D 499/87 (2006.01)

Patent

CA 2386081

Stable crystals of diphenylmethyl 2-methyl-2-triazolyl-methylpenam-3- carboxylate, which cause substantially no decomposition or deterioration even after allowing to stand at room temperature for one year. The crystals are produced by concentrating a solution of diphenylmethyl 2-methyl-2- triazolylmethylpenam-3-carboxylate of formula (2), diluting the resulting concentrate with an acetic ester, and mixing the obtained dilution with hexane or a hexane/acetic ester mixture to crystallize diphenylmethyl 2-methyl-2- triazolylmethyl-penam-3-carboxylate wherein Ph is phenyl.

L'invention concerne des cristaux stables de diphénylméthyle 2-méthyl-2-triazolyl-méthylpenam-3-carboxylate, qui ne se décomposent ou ne se détériorent pratiquement pas même après avoir été exposés à la température du laboratoire pendant un an. On produit les cristaux en concentrant une solution de diphénylméthyle 2-méthyl-2-triazolylméthylpenam-3-carboxylate de formule (2), en diluant le concentré résultant avec un ester acétique, et en mélangeant la dilution obtenue avec de l'hexane ou un mélange d'hexane/d'ester acétique afin de cristalliser le diphénylméthyle 2-méthyl-2-triazolylméthylpenam-3-carboxylate, où Ph représente le phényle.

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