RCM Approaches toward the Diastereoselective Synthesis of Vicinal <i>trans</i>-Diaminocyclitols from <scp>l</scp>-Serine
作者:Xin Cong、Qing-Jiang Liao、Zhu-Jun Yao
DOI:10.1021/jo0496547
日期:2004.8.1
Starting from l-serine, the asymmetric synthesis of four diaminocyclitol derivatives as sugar-based glycosidase inhibitors has been achieved using ring-closing metathesis (RCM) as a key step. Introduction of vicinal trans-diamino functionality onto the acyclic precursors was accomplished by highly diastereoselective addition of Grignard reagent to imine, and the elaboration of polyhydroxylic groups
从1-丝氨酸开始,已经使用闭环复分解(RCM)作为关键步骤实现了作为糖基糖苷酶抑制剂的四种二氨基环醇衍生物的不对称合成。通过将格氏试剂高度非对映选择性地添加到亚胺中,将邻位的反式-二氨基官能团引入到无环前体中,并且通过非对映选择性的烯烃环氧化或二羟基化来实现多羟基的形成。最终产物的绝对构型已通过2D NMR研究确认。