(5'S,8R,9S,13S,14S,17S)-3-{[tert-butyl(dimethyl)silyl]oxy}-13-methyl-5'-[2-(methylthio)ethyl]-6,7,8,9,11,12,13,14,15,16-decahydro-6'H-spiro(cyclopenta[a]phenanthrene-17,2'-[1,4]oxazinan)-6'-one 、
溴甲苯 在
N,N-二异丙基乙胺 作用下,
以
二氯甲烷 为溶剂,
反应 24.0h,
以51%的产率得到(5'S,8R,9S,13S,14S,17S)-4'-benzyl-3-{[tert-butyl(dimethyl)silyl]oxy}-13-methyl-5'-[2-(methylthio)ethyl]-6,7,8,9,11,12,13,14,15,16-decahydro-6'H-spiro(cyclopenta[a]phenanthrene-17,2'-[1,4]oxazinan)-6'-one