A stereodivergent synthesis of (+/-)-cyclophellitol (1) and its unnatural diastereoisomer (1R*,6S*)-cyclophellitol (2), starting from the Diels-Alder adduct of furan and acrylic acid, is reported. The stereochemistry of the key step, the epoxidation of alkene 7, is controlled by the nature of the hydroxyl protecting groups.