A CHEMO-ENZYMATIC APPROACH TO THE SYNTHESIS OF PIMECROLIMUS

摘要

Processes for preparing pimecrolimus starting from ascomycin, exploiting theselectivity characteristics of the purifiedenzymatic systems particularly regarding the selective functionalization ofthe hydroxyl groups present in position 24 and 33of ascomycin. Such method represents the first example of chemoenzymaticsynthesis for preparing pimecrolimus.