Glycosylation of n-pentenyl glycosides using bromodiethylsulfonium salt as an activator: interception of the glycosyl intermediate by chloride ion transfer

Glycosylation of n -pentenyl glycosides (NPGs) was achieved via a glycosyl chloride intermediate using bromodiethylsulfonium bromopentachloroantimonate (BDSB) as a potent brominating agent.