A domino reaction has been developed for the synthesis of oxygen bridgedbicyclicethers through the coupling of 4-(2-hydroxyethyl)cyclohex-3-enols with aldehydes in the presence of 10 mol% of molecular iodine in dichloromethane at 25 °C. This method is highly diastereoselective affording the corresponding bicyclicethers, i.e. octahydro-4a,7-epoxyisochromenes in good yields with high selectivity.