反应详情

Sodium thiomethoxide (459 mg) was added to a solution of methyl 4-bromo-2-chlorobenzoate (1.25 g) in N,N-dimethylformamide (10 ml) under ice-cooling, and the mixture was stirred for 2 hr. 1N Hydrochloric acid was added to the reaction mixture and the resulting product was extracted three times with ether. The organic layers were combined, washed successively with water and saturated brine, and dried over anhydrous magnesium sulfate. The solvent was evaporated and the residue was subjected to silica gel column chromatography (hexane/ethyl acetate=10/1) to give the objective compound (835 mg) as a colorless oil.

1. temperaturecooling
2. extractionthe resulting product was extracted three times with ether
3. washwashed successively with water and saturated brine
4. dry with materialdried over anhydrous magnesium sulfate
5. customThe solvent was evaporated