Interglucosyl Attack of Hydroxyl Group to Epoxy Ring of 2A,3A-Anhydro-(2AS)-α-cyclodextrin. Selective Preparation of 3A,2B-Anhydro-α-cyclodextrin

Abstract 2A,3A-Anhydro-(2AS)-α-cyclodextrin was isomerized exclusively to 3A,2B-anhydro-α-cyclodextrin by the reaction with aqueous alkali. This implies the selective and interglucosyl attack of 3F-OH to the epoxy ring.