(2aR,3R,4S,5aS,5bS,7S,7aR,9S,11aR,12aS)-4,7-dimethoxy-3-((2R,5S)-5-(2-methoxypropan-2-yl)-2-methyltetrahydrofuran-2-yl)-2a,5a,8,8-tetramethyltetradecahydro-1H,12H-cyclopenta[a]cyclopropa[e]phenanthren-9-yl (tert-butoxycarbonyl)-L-valinate 在
盐酸 作用下,
以
乙醚 为溶剂,
反应 8.0h,
以70%的产率得到2-(L)-amino-3-methyl-butyric acid 6α,16β-dimethoxy-17-[5-(1-methoxy-1-methyl-ethyl)-2-methyl-tetrahydro-furan-2-yl]-4,4,13,14-tetramethyl-tetradecahydro-cyclopropa[9,10]cyclopenta[a]phenanthren-3β-yl ester hydrochloride