2-bromo-2-deoxy sugars as starting materials for the synthesis of α- or β-glycosides of 2-deoxy sugars
作者:Klaus Bock、Inge Lundt、Christian Pedersen
DOI:10.1016/0008-6215(84)85275-1
日期:1984.7
-acetyl-2,6-dibromo-2,6-dideoxy-α- d -gluco- ( 1 ) and - d -manno-pyranosyl bromide ( 18 ) gave, in glycosidation reactions, 1,2- trans -glycosides. β- d -Glycosides were formed as the main products from 1 in moderate yields, whereas 18 gave α-d -glycosides exclusively and in high yields. The 2,6-dibromo-2,6-dideoxy-β- d -glucosides were converted into the 2,6-dideoxy-β- d -glycosides by treatment with