A study of the transformation of Δ7-9, 11α-oxidosteroids into Δ8-11-ketosteroids leads to a new two-step process giving excellent yields. Thus Δ8-11-ketones of the ergostane, androstane and, for the first time, also of the cholestane series are prepared. Δ7-11-ketosteroids appear as intermediates which, according to their reactions, seem to belong to the 9β-series. On the basis of this observation
Δ的转化的研究7 -9,11α-oxidosteroids成Δ 8 -11-
酮类固醇导致一个新的两步法得到优良的产率。THUSΔ 8的麦角stane,雄烷,并且对于第一次的-11-酮,该胆甾的制备系列。Δ 7 -11酮基类
固醇出现作为中间体其中,根据它们的反应中,似乎属于9β-系列。基于该观察结果,提出了
环氧化物异构化成酮的反应机理。