4,6-O-Benzylidene-1-O-methyl-2,3-deoxy-α-D-glucopyranose-2,3-diyl 1,2-phenylene orthocarbonate

Abstract

The title compound, C21H20O8, is the mixed orthocarbonic acid ester of the alcohol components benzene-1,2-diol and 4,6-O-benzyl­idene-1-O-methyl-α-d-glucopyran­oside. The compound represents the first example of a structurally characterized carbohydrate ester of orthocarbonic acid. Both oxacyclic six-membered rings in the structure adopt a chair conformation. The puckered five-membered ring at the spiro centre is present in a twist conformation. No special inter­actions are observed in the mol­ecular packing.