Stereospecific Uncatalyzed α-<i>O</i>-Glycosylation and α-<i>C</i>-Glycosidation by Means of a New <scp>d</scp>-Gulal-Derived α Vinyl Oxirane
作者:Valeria Di Bussolo、Micaela Caselli、Maria Rosaria Romano、Mauro Pineschi、Paolo Crotti
DOI:10.1021/jo0491152
日期:2004.10.1
The reaction of α vinyl oxirane 5, prepared through a new route to the d-gulal system, with O-nucleophiles (alcohols and di-O-isopropylidene-α-d-monosaccharides) and C-nucleophiles (lithium alkyls) affords, in a completely stereoselective way, the corresponding 2-unsaturated α O- and C-glycosides having the same configuration as the starting epoxide.
通过新途径制得的通往d-古拉尔系统的α-乙烯基环氧乙烷5与O-亲核试剂(醇和二-O-异亚丙基-α - d-单糖)和C-亲核试剂(烷基锂)反应,得到一个完全立体选择性方式,相应的2-不饱和的α ø -和ç -glycosides具有相同的结构的起始环氧化物。