反应详情

10 g (38.2 mmol) of 4′-bromo-4-chlorobutyrophenone, 4 g (38.2 mmol) of 2,2-dimethyl-1,3-propanediol and 200 mg (1 mmol) of p-toluenesulfonic acid monohydrate were heated under reflex in benzene for 3 days to conduct the azeotropic dehydration. Saturated aqueous sodium hydrogencarbonate solution was added to the reaction mixture. After the extraction with ethyl acetate, the extract was washed with water and saturated aqueous common salt solution and then dried over anhydrous magnesium sulfate. The solvent was evaporated to obtain the title compound.

1. extractionAfter the extraction with ethyl acetate
2. washthe extract was washed with water and saturated aqueous common salt solution
3. dry with materialdried over anhydrous magnesium sulfate
4. customThe solvent was evaporated