Intramolecular glycosylation of prearranged glycosides. A novel tool for controlling the reactivity and anomeric selectivity of glycosylations
作者:Thomas Ziegler、Richard Lau
DOI:10.1016/0040-4039(95)00010-a
日期:1995.2
The intramolecular (1-->4) glycosylation of partially protected alkyl gluco- and galactosides with ethyl 1-thio-rhamnoside that is preconnected via position 2 with a succinyl spacer to positions 3 and 6, respectively of the glycosyl acceptor affords the corresponding alpha- and beta-linked disaccharides. The anomeric selectivity depends on the stereochemistry of the donor-acceptor-interaction and is influenced by the position of the succinyl bridge.