(3aS,3bR,9aR,9bS,11aS)-9a,11a-dimethyl-3,3a,3b,4,5,8,9,9a,9b,10,11,11a-dodecahydro-1H-cyclopenta[i]phenanthridine-1,7(2H)-dione 、
2-(三甲基硅烷基)乙氧甲基氯 在
N,N-二异丙基乙胺 作用下,
以
二氯甲烷 为溶剂,
以86%的产率得到9a,11a-dimethyl-5-((2-(trimethylsilyl)ethoxy)methyl)-3,3a,3b,4,5,8,9,9a,9b,10,11,11a-dodecahydro-1H-cyclopenta[i]phenanthridine-1,7(2H)-dione