Synthesis and conformational analysis of methyl 3-O-[α-l(and d)-rhamnopyranosyl]maltoside derivatives: A branched trisaccharide with the central glucopyranose residue in the 1C4 conformation
fluorides (24 and 25), and the latter transformed into the 1,6-anhydro derivatives by treatment with strong base. The conformations of the acetylated derivatives have been analysed by 1H- and 13C-n.m.r.spectroscopy. In most of the branched trisaccharide derivatives, the conformation of the central glucopyranose residue is predominantly 1C4. X-Ray analysis showed that, in the solid state for the glycosyl