Synthesis and Photoreaction of<i>D</i>-Nor-5α-androstan-16-one Acetylhydrazone in the Presence of Oxygen
作者:Hiroshi Suginome、Tsutomu Uchida、Kazuhiko Kizuka、Tadashi Masamune
DOI:10.1246/bcsj.53.2285
日期:1980.8
were the parent ketone and 17-oxa-5α-androstan-16-one, accompanied by low yields of three isomeric lactams: 17-aza-5α-androstan-16-one, 16-aza-5α-androstan-17-one, and 17-aza-5α,13α-androstan-16-one. These three are the same lactams formed in the photo-Beckmann rearrangement of the corresponding oxime, D-nor-5α-androstan-16-one oxime. Their formation from the acetylhydrazone may have some mechanistic significance
D-Nor-5α-androstan-16-one 由 16-diazo-3β-hydroxyandrost-5-en-17-one 通过七个步骤制备。其乙酰腙在含氧二恶烷中光解的主要产物是母体酮和 17-oxa-5α-androstan-16-one,伴随着三种异构内酰胺的产率低:17-aza-5α-androstan-16-one 、16-aza-5α-androstan-17-one 和 17-aza-5α,13α-androstan-16-one。这三个是在相应肟 D-nor-5α-androstan-16-one 肟的光贝克曼重排中形成的相同内酰胺。它们从乙酰腙的形成可能对先前报道的在氧气存在下 5α-androstan-17-one 乙酰腙光解中内酰胺的形成路径具有一定的机械意义。