toward transforming the products so obtained to d-homo-17,17a-diones. The latter, conveniently prepared by this means, were studied in the benzilic acid rearrangement mode of ring contraction back to steroids bearing a 17β-carboxyl and a 17β-hydroxyl. This rearrangement has been found to proceed in one steric sense, which may be accounted for on the basis of intermediates generated in compliance with the
为了将如此获得的产物转化为d-homo-17,17a-二酮,已经实现了某些皮质激素的d-同型环化。后者通过这种方法方便地制备,以苯
环酸重排模式将环收缩回到带有17β-羧基和17β-羟基的甾族化合物上进行了研究。已经发现这种重排是在一种空间意义上进行的,这可以根据按照构象分析原理产生的中间体来解释。