Stereochemical Aspects of the Photo-Beckmann Rearrangement. Stereochemical Integrity of the Terminus of the Migrating Carbon in the Photo-Beckmann Rearrangements of 5α- and 5β-Cholestan-6-one Oximes
作者:Hiroshi Suginome、Hajime Takahashi
DOI:10.1246/bcsj.48.576
日期:1975.2
anti-5β-cholestan-6-one oxime with polyphosphoric acid at 90° takes place prior to the syn-anti equilibration of these isomers. In the photo-Beckmann rearrangement a pair of lactams, in both of which the original configurations of Cα with respect to the oximino-group of the starting oximes were retained, was produced irrespective of the configuration of the oximino-group of the starting oxime. The difference