Solvent-Dependent, Kinetically Controlled Stereoselective Synthesis of 3- and 4-Thioglycosides
作者:Zhichao Pei、Hai Dong、Olof Ramström
DOI:10.1021/jo050650r
日期:2005.8.1
are presented. The dependencies of the solvent and the protecting group pattern, as well as the configuration of the neighboring and leaving groups, have been studied for these reactions. The results clearly show that the efficient stereoselective synthesis of methyl 3-thio-galactoside depends highly on the solvent and the nucleophile concentration.
提出了从母体三氟甲磺酸酯制备半乳糖,古洛糖和葡萄糖型3-和4-硫代糖苷的简便方法。对于这些反应,已经研究了溶剂和保护基图案的依赖性以及相邻和离去基团的构型。结果清楚地表明,甲基3-硫代半乳糖苷的有效立体选择性合成在很大程度上取决于溶剂和亲核试剂的浓度。