Ring opening of 2,3-, 3,4-, and 4,6-O-benzylidene acetals of pyranosides by photobromination with bromotrichloromethane
作者:Jasbir S. Chana、Peter M. Collins、Farnoosh Farnia、David J. Peacock
DOI:10.1039/c39880000094
日期:——
2,3- 3,4-, and 4,6-O-Benzylidene pyranoside derivatives on photobromination in bromotrichloromethane yield bromo-deoxy-pyranoside benzoates regio- and stereo-specifically which, for the acyl derivatives of the 2,3- and 3,4-acetals, is superior to their reaction with N-bromosuccinimide.
2,3- 3,4-和4,6- O-苄叉基
吡喃糖苷衍
生物在
溴代三
氯甲烷中进行光
溴化后,会生成
溴-脱氧-
吡喃侧
苯甲酸苯甲酸酯和立体异构体,对于2,3-和3的酰基衍
生物,4-
缩醛优于它们与N-
溴代琥珀
酰亚胺的反应。