Glycosylated vinyl ethers by the Julia–Lythgoe–Kocienski olefination: application to the synthesis of 2′,5′-dideoxydisaccharides and carbohydrated β-lactams
作者:Iván Pérez Sánchez、Edward Turos
DOI:10.1016/j.tetasy.2009.05.039
日期:2009.7
(E)-stereoselectivities. These glycosylated adducts undergo hetero-Diels–Alder reactions with 2-formyl-1-malondialdehyde to afford 2′,5′-dideoxygenated disaccharides in good yields and complete regio- and endo-selectivity. Alternatively, the [2+2]-cycloaddition reaction of the glycosidic enol ethers with chlorosulfonylisocyanate provided glycosylated β-lactams regioselectively and with only trans-stereoselectivity