(3) with NaI in 2-propanol, the initially formed 19-iodo derivative (4) undergoes supraface migration of the CH2I group from the C(10) atom to the C(6) atom, probably through involvement of a homoallyl cation. The resulting 6β-iodomethyl-16α,17α-cyclohexano-19-norpregn-5(10)-en-3β-ol (5) was transformed in three steps into 6α-methyl-16α,17α-cyclohexano-19-norprogesterone (6α-methyl-19-nor-D′6-pentarane
在 19-tosyloxy-16α,17α-cyclohexanopregn-5-en-3β-ol-20-one (3) 与 NaI 在 2-
丙醇中长时间回流后,最初形成的 19-
碘衍
生物 (4) 经历了表面迁移
CH2I 基团从 C(10) 原子到 C(6) 原子,可能是通过高烯丙基阳离子的参与。得到的 6β-iodomethyl-16α,17α-cyclohexano-19-norpregn-5(10)-en-3β-ol (5) 分三步转化为 6α-methyl-16α,17α-cyclohexano-19-norprogesterone (6α -甲基-19-nor-D'6-
戊烷,8)。化合物 5 转化为目标产物 8 还得到了副产物,带有芳环 A (10) 的
戊烷,通过光谱方法对其进行了分离和表征。