Process for r-epimer enrichment of 16,17-acetal derivatives...

Details Process for r-epimer enrichment of 16,17-acetal derivatives... Process for r-epimer enrichment of 16,17-acetal derivatives...

C - Chemistry, Metallurgy

07

J

C07J 71/00 (2006.01) C07J 75/00 (2006.01)

Patent

CA 2264863

The invention describes a process for epimer enrichment of compounds of formula (I) where R1 1 and R2 are as defined in the description, by fractional crystallization.

L'invention a pour objet un procédé pour l'enrichissement en épimère de composés de la formule (I), par cristallisation fractionnée. Dans cette formule, R<1> et R<2> sont tels que définis dans le descriptif.

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