We here report glycosyl sulfoxides appended with an aryl iodide moiety as readily available, air and moisture stable precursors to glycosyl radicals. These glycosyl sulfoxides could be converted to glycosyl radicals by way of a rapid and efficient intramolecular radical substitution event. The use of this type of precursors enabled the synthesis of various complex C‐linked glycoconjugates under mild
Preparation of anomeric pairs of 1-thioglycosides: use of anomerization catalyzed by boron trifluoride
作者:Daniel T. Connolly、Saul Roseman、Yuan C. Lee
DOI:10.1016/s0008-6215(00)85209-x
日期:1980.12
Abstract Anomeric pairs of some alkyl 1-thioaldopyranosides of d -galactose, d -glucose, d -mannose, 2-acetamido-2-deoxy- d -glucose, 2-acetamido-2-deoxy- d -galactose, and l -fucose were prepared. The per- O -acetylated, 1,2- trans anomers of 6-(trifluoroacetamido)hexyl 1-thioaldopyranosides and 5-(methoxycarbonyl)pentyl 1-thioaldopyranosides were anomerized with borontrifluoride in dichloromethane. The