The key intermediate VI was prepared by two ways: by B ring contraction of an androst-5-ene-3β,17α-diol derivative I and by configurational inversion of the 17β-hydroxy group in a B-norandrost-5-ene-3β,17β-diol derivative XII. B-Norepitestosterone (IX) and its potentional metabolite X were then prepared by standard methodology. Both these compounds appear to be inhibitors of 5α-reductase.
关键的
中间体VI通过两种方法制备:一种是通过一种雄烷-5-
烯-3β,17α
-二醇衍
生物I的B环收缩,另一种是通过B-去甲雄烷-5-
烯-3β,17β
-二醇衍
生物XII的17β-羟基构型反转。然后,使用标准方法制备了B-去
甲睾酮(IX)及其潜在代谢物X。这两种化合物似乎都是5α-还原酶的
抑制剂。