乙酸酐 、
(S)-[(3aR,5aR,6R,10aR)-6-((R)-1,5-Dimethyl-hexyl)-3a,5a-dimethyl-2-oxo-tetradecahydro-1-oxa-dicyclopenta[a,f]naphthalen-10a-yl]-hydroxy-acetic acid methyl ester 在
吡啶 作用下,
反应 24.0h,
以95%的产率得到(S)-Acetoxy-[(3aR,5aR,6R,10aR)-6-((R)-1,5-dimethyl-hexyl)-3a,5a-dimethyl-2-oxo-tetradecahydro-1-oxa-dicyclopenta[a,f]naphthalen-10a-yl]-acetic acid methyl ester