Stereoselective Synthesis of 2-<i>S</i>-Phenyl-2-deoxy-β-glycosides Using Phenyl 2,3-<i>O</i>-Thionocarbonyl-1-thioglycoside Donors via 1,2-Migration and Concurrent Glycosidation
作者:Biao Yu、Zunyi Yang
DOI:10.1021/ol006894+
日期:2001.2.1
[figure: see text] 1,2-Migration and concurrent glycosidation of phenyl 2,3-O-thionocarbonyl-1-thlo-alpha-L-rhamnopyranosides under the action of methyl trifluoromethanesulfonate (MeOTf) afforded in high yields the 3-O-(methylthio)carbonyl-2-S-phenyl-2,6-dideoxy-beta-L-glucopyranosides, ready precursors to the corresponding 2-deoxy-beta-glycosides.
[图:见正文]在高产量的三氟甲磺酸甲酯(MeOTf)的作用下,1,2,3-O-硫代羰基-1-噻吩-α-L-鼠李糖吡喃糖苷的1,2-迁移和同时糖基化3-O -(甲硫基)羰基-2-S-苯基-2,6-二脱氧-β-L-吡喃葡萄糖苷,相应的2-脱氧-β-糖苷的现成前体。