2,2,6,6-tetramethyl-1-oxopiperidine tribromide 、
fusidic acid methyl ester 在
吡啶 作用下,
反应 2.0h,
生成 1-{6-[(1Z,2S,3aS,3bS,6S,9aS,10R)-2-(acetoxy)-10-hydroxy-3a,3b,6,9a-tetramethyl-7-oxohexadecahydro-1H-cyclopenta[a]phenanthren-1-ylidene]-3-bromo-7-methoxy-2-methyl-7-oxoheptan-2-yl}-1-pyridinium bromide 、 1-{6-[(1Z,2S,3aS,3bS,6S,7R,9aS,10R)-2-(acetoxy)-7,10-dihydroxy-3a,3b,6,9a-tetramethylhexadecahydro-1H-cyclopenta[a]phenanthren-1-ylidene]-3-bromo-7-methoxy-2-methyl-7-oxoheptan-2-yl}-1-pyridinium bromide