作者:Lisa J. Whalen、Randall L. Halcomb
DOI:10.1021/ol0490779
日期:2004.9.1
route for the synthesis of an electrophilic, carbocyclic galactose equivalent from D-galactose is described. The strategy utilizes ring-closing metathesis with Grubbs's second-generation catalyst as the key step. The galactose-derived electrophile reacted in an S(N)2 fashion with N-Boc-cysteine methyl ester to provide an alpha-galactosylserine isostere. The method was extended to the synthesis of a glycopeptide
[反应:见正文]描述了由D-半乳糖合成亲电的碳环半乳糖等效物的途径。该策略将闭环复分解与格鲁布斯的第二代催化剂作为关键步骤。半乳糖衍生的亲电试剂以S(N)2的方式与N-Boc-半胱氨酸甲酯反应,以提供α-半乳糖基丝氨酸等排异构体。该方法扩展到糖肽等排体的合成。