Application of 2-Azido-2-deoxythioglycosides for β-Glycoside Formation and Oligosaccharide Synthesis
作者:Kwok-Kong Tony Mong、Yu-Fang Yen、Wei-Cheng Hung、Yen-Hsun Lai、Jiun-Han Chen
DOI:10.1002/ejoc.201200173
日期:2012.5
configuration. This study investigated the use of 2-azido-2-deoxythioglycosides for 1,2-trans-β-glycosidic bond formation under low-concentration glycosylation conditions. Further application of the 2-azido-2-deoxythioglycosyl substrates for one-pot oligosaccharide synthesis was demonstrated in the synthesis of protected β-(16)-N-acetylglucosamine trimer, core-6–serine conjugate, and F1–α serine conjugate.
Dimethylformamide: An Unusual Glycosylation Modulator
作者:Shao-Ru Lu、Yen-Hsun Lai、Jiun-Han Chen、Chih-Yueh Liu、Kwok-Kong Tony Mong
DOI:10.1002/anie.201100076
日期:2011.8.1
A simple solution: When N,N‐dimethylformamide was used to direct the stereochemical course of glycosylation reactions, 1,2‐cis glycosylation products were formed with excellent selectivity. A straightforward highly α‐stereoselective glycosylation involving preactivation (see scheme) should find broad application and be especially useful for sequential glycosylation reactions to form oligosaccharides