oxime affords two isomeric lactams with cyclopropane rings arising from photo-Beckmann rearrangement although the yields are poor. The result gives further support to our view on the C→N migration process in photo-Beckmann rearrangement. The major part of the products of the reaction consisted of the parent ketone and several products probably derived from it. The results are compared with those obtained
3α,5-cyclo-5α-cholestan-6-one
肟的光解得到两种异构内酰胺,其中
环丙烷环由光-贝克曼重排产生,尽管产率很低。结果进一步支持了我们对 photo-Beckmann 重排中 C→N 迁移过程的看法。反应产物的主要部分由母体酮和可能由它衍生的几种产物组成。结果与我们在 5α-cholestan-6-one
肟和异构体 5β-cholestan-6-one
肟的光解中获得的结果进行了比较。内酰胺的低产率可能是由于在这种共轭环丙基酮
肟中存在
环丙烷环。