A Stereocontrolled Construction of 2-Deoxy-β-glycosidic Linkagesvia1,2-trans-β-Glycosidation of 2-Deoxy-2-[(p-methoxyphenyl)thio] glycopyranosylN,N,N′,N′-Tetramethylphosphoroamidates
Stereoselective Synthesis of 2‐Deoxyglycosides from Glycals by Visible‐Light‐Induced Photoacid Catalysis
作者:Gaoyuan Zhao、Ting Wang
DOI:10.1002/anie.201800909
日期:2018.5.22
The direct, photoacid‐catalyzed synthesis of 2‐deoxyglycosides fromglycals is reported. A series of phenol‐conjugated acridinium‐based organic photoacids were rationally designed, synthesized, and studied alongside the commercially available phenolic catalyst eosin Y. In the presence of such a photoacid catalyst and light, synthetic glycals were activated and coupled with a range of alcohols to afford
Lewis acid mediated stereoselectivesynthesis of 2-deoxy-O-glycosides has been demonstrated using 2-deoxyglycosyl 3-benzoylpropionates as novel glycosyl donors. These newly developed donors are easily synthesized from simple glycals, are stable at room temperature and react with ease to provide products with high stereoselectivity. These donors can be successfully utilized with all types of acceptors
Reagent‐Controlled α‐Selective Dehydrative Glycosylation of 2,6‐Dideoxy‐ and 2,3,6‐Trideoxy Sugars
作者:Jason M. Nogueira、Marissa Bylsma、Danielle K. Bright、Clay S. Bennett
DOI:10.1002/anie.201605091
日期:2016.8.16
that activating either 2,3‐bis(2,3,4‐trimethoxyphenyl)cyclopropenone or 2,3‐bis(2,3,4‐trimethoxyphenyl)cyclopropene‐1‐thione with oxalyl bromide results in the formation of a species that promotes the glycosylation between 2,6‐dideoxy‐sugar hemiacetals and glycosyl acceptors in good yield and high α‐selectivity. Both reactions are mild and tolerate a number of sensitive functional groups including highly