Methanesulfonic acid (4bS,6R,7S,8aR,9S)-6-(tert-butyl-dimethyl-silanyloxy)-2,3,7-trimethoxy-9-propylcarbamoyl-5,6,7,8,9,10-hexahydro-4bH-phenanthren-8a-ylmethyl ester 在
sodium hydride 作用下,
以
二甲基亚砜 为溶剂,
反应 2.0h,
以67%的产率得到2-dimethyl-t-butylsilyloxy-1,2,3,4,5,6,7,7a,8,12b-decahydro-3,10,11-trimethoxy-6-propylphenanthro<8a,9-c>pyrrol-7-one