Aglycone mimics for tuning of glycosidase inhibition: design, synthesis and biological evaluation of bicyclic pyrrolidotriazole iminosugars

Abstract

Various fuco-configured bicyclic pyrrolidotriazole aglycone mimics were synthesised using copper-catalysed coupling of allyl bromides with terminal alkynes and Sonogashira–Hagihara reaction followed by intramolecular azide-alkyne ‘click’ reaction. The mimicry of the aglycone segment tends to bring about switching of activity amongst α-glucosidases and a 10 to 14-fold enhancement in potency for α-fucosidase inhibition.