Substoichiometric FeCl3 Activation of Propargyl Glycosides for the Synthesis of Disaccharides and Glycoconjugates

Glycosides as glycosyl donors using FeCl3 have been described. Under optimal reaction conditions, three kinds of propargyl glycosides were found to react with steroids and sugar- derived glycosyl acceptors to afford the corresponding disaccharides and glycoconjugates in good to excellent yields (66- 91%). Meanwhile, the method can also realize one- pot synthesis of disaccharides, making it an effective, affordable, and green glycosylation procedure.