(5'S,8R,9S,13S,14S,17S)-4'-benzyl-3-{[tert-butyl(dimethyl)silyl]oxy}-5'-isopropyl-13-methyl-6,7,8,9,11,12,13,14,15,16-decahydro-6'H-spiro(cyclopenta[a]phenanthrene-17,2'-[1,4]oxazinan)-6'-one 在
盐酸 作用下,
以
四氢呋喃 、
甲醇 为溶剂,
反应 8.0h,
以90%的产率得到(5'S,8R,9S,13S,14S,17S)-4'-benzyl-3-hydroxy-5'-isopropyl-13-methyl-6,7,8,9,11,12,13,14,15,16-decahydro-6'H-spiro(cyclopenta[a]phenanthrene-17,2'-[1,4]oxazinan)-6'-one