反应详情

Ethylmagnesium bromide (3M solution in diethyl ether, 54.4 ml) was added at room temperature to a solution of methyl 3-bromo-4-methoxybenzoate (CAS No. 35450-37-4, 10 g) and titanium (IV) isopropoxide (23.9 ml) in THF (100 ml). The reaction mixture was stirred at room temperature overnight. Ethyl acetate and water were added to the reaction mixture and the precipitate was removed through Celite. The organic layer was separated, washed with brine and dried over anhydrous magnesium sulfate. The filtrate was concentrated under reduced pressure and the residue was purified by silica gel column chromatography to obtain the title compound (7.77 g).

1. customthe precipitate was removed through Celite
2. customThe organic layer was separated
3. washwashed with brine
4. dry with materialdried over anhydrous magnesium sulfate
5. concentrationThe filtrate was concentrated under reduced pressure
6. customthe residue was purified by silica gel column chromatography