Reagent switchable stereoselective beta(1,2) mannoside mannosylation: OH-2 of mannose is a privileged acceptor.
Doores KJ., Davis BG.
The discovery of novel conditions for highly beta-stereoselective (>9 : 1) mannosylation of OH-2 of mannosides using a straightforward perbenzylthioglycoside donor has allowed ready assembly of beta-mannosyl oligosaccharides including the repeating trisaccharide motif of the O5 antigen of pathogen Klebsiella pneumoniae.