反应详情

6-(1,3-Dioxolan-2-ylmethyl)-3,4-dihydro-1H-isochromen-1-one (4.42 g, 18.9 mmol) was dissolved in dioxane (25 mL) and treated with 3 M HCl (40 mL). The reaction mixture was stirred at RT over night, and then was warmed to 50° C. for 2 hrs to drive the reaction to completion. Ethyl acetate was added and the layers were separated. The aqueous layer was extracted again with ethyl acetate, and the combined organic layers were washed with brine and dried over MgSO4 to afford the title compound. LCMS: m/z 191 (M+1)+.

1. temperaturewas warmed to 50° C. for 2 hrs
2. customthe reaction to completion
3. customthe layers were separated
4. extractionThe aqueous layer was extracted again with ethyl acetate
5. washthe combined organic layers were washed with brine
6. dry with materialdried over MgSO4