Add time:07/28/2019         Source:sciencedirect.com

A practical and efficient α-selective aromatic glycosylation with simple per-O-acetyl glycopyranosyl trichloroacetimidates is reported. The method is particularly effective for L-fucosyl and 2-azido-2-deoxy-d-galatosaminyl imidates, with which exclusive α-selectivity was achieved. The synthetic utility of this method was demonstrated in the stereoselective synthesis of 4-methylumbelliferyl α-T-antigen.

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