摘要:
A disaccharide scaffold based on galabiose (Galal-4Gal) was synthesized. Four different acceptors were evaluated in the alpha-galactosylation and a relationship between the nucleophilicity, yield, and alpha/beta-selectivity was found. The scaffold contains two orthogonal derivatisation sites, i.e. at O-2' and the anomeric position, and as proof of concept, one derivatised galabioside was synthesized. Compounds based on this galabiose-scaffold are potential inhibitors of P- and P-k-antigen binding proteins. (C) 2003 Elsevier Science Ltd. All rights reserved.