New methods for the synthesis of 2-(2,2,2-trichloroethoxy)-(3,4,6-tri-O-acetyl-1,2-dideoxy-α-D-glucopyrano)-[2,1-d]-2-oxazoline and its use for stereo-, chemo- and regioselective glycosylation
作者:Sergey S. Pertel、Sergey A. Seryi、Elena S. Kakayan、Alexander I. Zinin、Leonid O. Kononov
DOI:10.1016/j.carres.2022.108633
日期:2022.10
chemoselective glycosylation reactions under extremely mild conditions. The undesirable side reaction of intermolecular aglycone transfer between an ethyl thioglycoside glycosyl acceptor and the 2-(2,2,2-trichloroethoxy)-2-oxazoline glycosyl donor occurred to a relatively small extent. Regio-, and chemoselectivity of the disaccharide synthesis with the oxazoline glycosyl donor depended on the reaction conditions
开发了从相应的 2-脱氧-2-(2,2,2-三氯乙氧基羰基氨基)葡糖基溴合成标题恶唑啉2的新方法。目标2-(2,2,2-三氯乙氧基)葡萄糖-[2,1- d ]-2-恶唑啉2可以在卤离子催化条件下,以三乙胺为碱合成。合成的 2-(2,2,2-三氯乙氧基)-2-恶唑啉糖基供体用于在极其温和的条件下进行立体选择性、区域选择性和化学选择性糖基化反应。乙基硫代糖苷糖基受体和2-(2,2,2-三氯乙氧基)-2-恶唑啉糖基供体之间的分子间糖苷配基转移的不良副反应发生的程度相对较小。用恶唑啉糖基供体合成二糖的区域选择性和化学选择性取决于反应条件。