hydrobromide 2 shows excellent properties in the activation of enol ethers and glycals, the introduction and cleavage of THP ethers being promoted with excellent yields with this functionalized polymer. Glycosidations of glycals work equally well, with suppression of the formation of undesired Ferrier rearranged products. The reagent is sufficiently mild to leave labile 2-deoxy glycosidic bonds and acid-labile