Protecting Group Manipulations on Glycosyl Phosphate Triesters
摘要:
Glucosyl and mannosyl phosphate triester building blocks were differentially protected by protecting group manipulations on competent glycosyl donors. Dibutyl 3,4-di-Obenzyl-6-O-(fluorenylmethoxycarbonyl)-2-O-pivaloyl-beta-D-glucopyranoside phosphate, not accessible by other methods, was prepared this way.
Synthesis of Glycosyl Phosphates from 1,2-Orthoesters and Application to in Situ Glycosylation Reactions
摘要:
A series of glycosyl phosphates were prepared in high yield by treatment of the corresponding 1,2-orthoesters with dibutyl phosphate. Glycosyl phosphates are efficient glycosylating agents even when used in crude form or when generated in situ. The immunodominant epitope trirhamnoside of group B Streptococcus was prepared to demonstrate the synthetic utility of the method.