How the arming participating moieties can broaden the scope of chemoselective oligosaccharides synthesis by allowing the inverse armed-disarmed approach

A new method is developed for stereocontrolled glycosylation and chemoselective oligosaccharide synthesis. The oligosaccharide synthesis has shown that the strategy has provided trans-trans and trans-cis patterned oligosaccharides as opposed to classic Fraser-Reid's armed-disarmed approach leading to cis-trans and cis-cis linkages.