devised a method for stereoselective O-glycosylation using an Ir(I)-catalyst which enables both hydroalkoxylation and nucleophilic substitution of glycals with varying substituents at the C3 position. In this transformation, 2-deoxy-α-O-glycosides were acquired when glycals equipped with a notoriously poor leaving group at C3 were used; in contrast 2,3-unsaturated-α-O-glycosides were produced from glycals
Palladium(<scp>ii</scp>)-catalyzed stereoselective synthesis of <i>C</i>-glycosides from glycals with diaryliodonium salts
作者:Kumar Bhaskar Pal、Jiande Lee、Mrinmoy Das、Xue-Wei Liu
DOI:10.1039/d0ob00247j
日期:——
An efficient palladium(II) mediated C-glycosylation of glycals with diaryliodoniumsalts is described, providing a new strategy for the synthesis of 2,3-dideoxy C-aryl glycosides with excellent stereoselectivity. The C-glycosylation of a diverse range of glycals, including D-glucal, D-galactal, D-allal, L-rhamnal, L-fucal, L-arabinal, D-maltal, and D-lactal, occurred effectively and the corresponding