Synthesis and Use of Glycosyl Phosphates as Glycosyl Donors
作者:Obadiah J. Plante、Rodrigo B. Andrade、Peter H. Seeberger
DOI:10.1021/ol9905452
日期:1999.7.1
Differentially protected glycosyl phosphates prepared by a straightforward synthesis from glycal precursors are used as powerful glycosyl donors. Activation of beta-glycosyl phosphates by TMSOTf at -78 degrees C achieves the selective formation of beta-glycosidic linkages in excellent yields with complete stereoselectivity. Reaction with thiols results in the conversion of glycosyl phosphates into thioglycosides
Oligosaccharide Synthesis with Glycosyl Phosphate and Dithiophosphate Triesters as Glycosylating Agents
作者:Obadiah J. Plante、Emma R. Palmacci、Rodrigo B. Andrade、Peter H. Seeberger
DOI:10.1021/ja016227r
日期:2001.10.1
Described is an efficient one-potsynthesis of alpha- and beta-glycosyl phosphate and dithiophosphate triesters fromglycals via 1,2-anhydrosugars. Glycosyl phosphates function as versatile glycosylating agents for the synthesis of beta-glucosidic, beta-galactosidic, alpha-fucosidic, alpha-mannosidic, beta-glucuronic acid, and beta-glucosamine linkages upon activation with trimethylsilyl trifluoromethanesulfonate