described. The transformation is induced by the action of zinc(II) on different 17-hydroxy-20-oxopregnanes. With 17α-hydroxy-20-oxopregnanes the reaction afforded 17aα-hydroxy-17aβ-methyl-D-homo-derivatives while under the same conditions 17β-hydroxy-20-oxopregnanes gave the corresponding 17a-epimeric-D-homo-steroids. In both cases the rearrangement was stereospecif giving the corresponding products in
描述了一种用于甾体领域中D-均质重排的新的高效方法。
锌(II)对不同的17-羟基-20-氧杂
戊烷类的作用诱导了转化。用17α-羟基-20-氧杂
戊烷,该反应得到17aα-羟基-17aβ-甲基-D-均聚物,而在相同条件下,17β-羟基-20-氧杂
戊烯类得到相应的17a-表异构-D-均甾体。在这两种情况下,重排都是立体指定,以几乎定量的产率得到相应的产物。