A Stereocontrolled Construction of 2-Deoxy-β-glycosidic Linkages<i>via</i>1,2-<i>trans</i>-β-Glycosidation of 2-Deoxy-2-[(<i>p</i>-methoxyphenyl)thio] glycopyranosyl<i>N</i>,<i>N</i>,<i>N</i>′,<i>N</i>′-Tetramethylphosphoroamidates
作者:Shun-ichi Hashimoto、Yuki Yanagiya、Takeshi Honda、Shiro Ikegami
DOI:10.1246/cl.1992.1511
日期:1992.8
A stereocontrolled synthesis of 2-deoxy-β-glycosides has been achieved by developing a salient 1,2-trans-glycosidation method with 2-deoxy-2-[(p-methoxyphenyl)thio]glycopyranosyl N,N,N′,N′-tetramethylphosphoroamidates as glycosyl donors followed by a reductive removal of the p-methoxyphenylthio group with Raney nickel. The p-methoxyphenylthio group equatorially disposed at C-2 has proven to be an excellent stereodirecting auxiliary.
通过开发一种显著的1,2-反式糖基化方法,使用2-脱氧-2-[(对甲氧基苯基)硫]吡喃糖基N,N,N',N'-四甲基膦酰胺作为糖基供体,随后用Raney镍还原去除对甲氧基苯硫基团,实现了2-脱氧-β-糖苷的立体控制合成。位于C-2位的对甲氧基苯硫基团在赤道位置上被证明是一个极佳的立体导向辅助基团。