Synthesis of Spacer-Linked Tail to Tail Dimers Derived from a Conformationally Rigid Aminodeoxysugar by Olefin Metathesis
作者:Andreas Kirschning、Guang-Wu Chen
DOI:10.1055/s-2000-6328
日期:——
The preparation of new tail to tail dimers of bridged aminodeoxysugars 2 and 11 is described. The first key step in the synthesis is the formation of the aminomethyl bridge in the carbohydrate-derived monomer 7 which is achieved by silver promoted ring closure of methyl 3-acetamido-6-bromo-2,3,6-trideoxy α-d-glucoside 6. Secondly, olefin metathesis of the corresponding 4-O-allyl glycoside 9 constitutes a powerful tool for dimerization, which allows synthesis of 1,4-butanediol-linked tail to tail neooligosaccharides 2 and 11.
本文描述了桥联氨基脱氧糖2和11的新尾对尾二聚体的制备。合成的第一步关键步骤是在碳水化合物衍生的单体7中形成氨基甲基桥,这是通过银促进的甲基3-乙酰氨基-6-溴-2,3,6-三脱氧-β-D-葡萄糖苷6的环合实现的。其次,相应的4-O-烯丙基糖苷9的烯烃复分解反应构成了二聚化的有力工具,从而可以合成1,4-丁二醇连接的尾对尾新寡糖2和11。