Stereoselective Synthesis of 2,3-Unsaturated-aza-<i>O</i>-glycosides via New Diastereoisomeric <i>N</i>-Cbz-imino Glycal-Derived Allyl Epoxides
作者:Valeria Di Bussolo、Annalisa Fiasella、Maria Rosaria Romano、Lucilla Favero、Mauro Pineschi、Paolo Crotti
DOI:10.1021/ol701836a
日期:2007.10.1
[GRAPHICS]Diastereoisomeric D,L-N-Cbz-imino glycal-derived allyl epoxides 5 and 6 have been synthesized, and their addition reactions with alcohols examined. The reactions lead to the corresponding 2,3-unsaturated-aza-O-glycosides through a new, completely regioselective 1,4-addition process which proceeds with complete substrate-dependent stereoselectivity.