Water → HCID 13711959, compound

Participants

Reaction Conditions

Reaction Steps

p-Toluenesulfonic acid monohydrate (8.2 mg) is added to benzene (12 ml). The mixture is stirred and refluxed in a Dean-Stark apparatus and some of the benzene (4 ml) is drained from the side-arm. The bicyclic acetoxy ester, ethyl(1RS,4SR,5RS)-4-(5-acetoxy-4,8-dimethyl-8-nonenyl)-4-methyl-3,8-dioxabicyclo[3.2.1]octane-1-acetate (85 mg, 0.2 mM), dissolved in benzene (6 ml), is added at room temperature to the above mixture and the resultant mixture is stirred and refluxed (bath at 130° C.) for two hours. The temperature of the heating bath is then lowered to 90° C. and the stirring is continued at 90° C. for sixteen hours and then at room temperature for seventy-two hours. The reaction mixture is added to saturated NaHCO3 --H2O (10 ml) and ether (20 ml). The organic layer is separated, washed with saturated NaCl--H2O, dried with Na2SO4, filtered, and evaporated in vacuo to give ethyl(1RS, 4SR,5RS)-4-(5-acetoxy-4,8-dimethyl-7-nonenyl)-4-methyl-3,8-dioxabicyclo[3.2.1]octane-1-acetate (80.4 mg, 95%).

Provenance & Evidence