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
Fe(III)-catalyzed stereoselective synthesis of deoxyglycosides using stable bifunctional deoxy-phenylpropiolate glycoside donors
作者:Anjali Aghi、Sankar Sau、Amit Kumar
DOI:10.1016/j.carres.2024.109051
日期:2024.2
Herein, we report a mild and economical route for the stereoselectivesynthesis of 2-deoxy and 2,6-dideoxyglycosides FeCl-catalyzed activation of bench stable deoxy-phenylpropiolate glycosyl donors (D-PPGs). Optimized reaction conditions work well under additive-free conditions to afford the corresponding 2-deoxy and 2,6-dideoxyglycosides in good yields with high α-anomeric selectivity by reacting
Highly Stereoselective Glycosyl-Chloride-Mediated Synthesis of 2-Deoxyglucosides
作者:Ved Prakash Verma、Cheng-Chung Wang
DOI:10.1002/chem.201203418
日期:2013.1.14
Cl intermediates: The glycosylation of per-O-benzylated 2-deoxy- and 2,6-dideoxythioglycosides, promoted by the combination of para-toluenesulfenyl chloride (p-TolSCl) and silver triflate (AgOTf), furnished the products in high yields and high stereoselectivity. The glycosyl chloride was the intermediate (see scheme).