Stereoselective Synthesis of 2-Deoxy-α-N-Glycosides from Glycals with
1,4,2-Dioxazol-5-ones
Abstract
The synthesis of N-glycosides has received significant attention due to
their crucial role in carbohydrate chemistry. Despite considerable
advancements were developed in the construction of N-glycosides, methods
for the stereoselective construction of 2-deoxy-α-N-glycosides are still
limited. Herein, we disclosed a nickel-catalyzed hydroamination of
glycals under mild conditions. This transformation could allow for the
stereoselective synthesis of an array of 2-deoxy-α-N-glycosides with
excellent α-stereoselectivity. Nickel-catalyzed glycosylation reactions,
particularly those involving anomeric C(sp3)-metal bond formation, have
proven to be an effec-tive and stereoselective strategy for producing
various N-glycosides. Additionally, with highlight the application of
this reaction, γ-sugar amino acid derivatives were synthesized by one
step.