反应详情

3-(1,3-dithiolan-2-yl)-6a,7,10,10 a-tetrahydro-6,6,9-trimethyl-6H-dibenzo[b,d]pyran-1-ol (VI) in the fourth step is then treated with mercuric oxide and boron trifluoride in an aqueous reaction medium containing an organic solvent which is water miscible, such as tetrahydrofuran. The oxidative cleavage is effected at room temperature to produce 3-formyl-6a,7,10,10a-tetrahydro-6,6,9-trimethyl-6H-dibenzo[ b,d]pyran-1-ol which can then be isolated by routine means.

1. additioncontaining an organic solvent which
2. customis effected at room temperature