2,3;5,6-Di-O-isopropyl­idene-1-O-(2-phenyl­acet­yl)-α-d-mannofuran­ose

The title compound, C(20)H(26)O(7), was prepared by esterification of 2,3;5,6-di-O-isopropyl­idene-α-d-mannofuran­ose with phenyl­acetic acid under standard DCC/DMAP (DCC = dicyclohexylcarbodiimide and DMAP = 4-dimethylaminopyridine) con­ditions. The solid-state structure confirms the retention of the α-configuration at the anomeric C atom. The compound is characterized by a relatively rigid framework with only a few degrees of freedom. Comparison with other di-O-isopropyl­idenemannofuran­ose derivatives shows the main differences to be associated with the flexible dimethyl­dioxolane ring, and that there are only small differences for the 2,3-O-isopropyl­idene-α-d-manno­furan­ose backbone. The packing is marked by a large number of weak C—H⋯O inter­actions.