反应详情

A solution of phenyllithium (210 ml, 2.1M in cyclohexane) was added dropwise to a solution of 66 g of 3-bromothiophene in 400 ml of anhydrous ether at 5° C. The entire process was conducted under nitrogen. After the addition, the solution was stirred overnight under nitrogen. The resultant solution was then added dropwise to a solution of m-methoxybenzoyl chloride (90 g) in 600 ml of tetrahydrofuran at -70° C. over two hours and thereafter stirring was continued for two hours at the same temperature. The reaction was then quenched with water, the organics were extracted into ether, and the ether phase was washed with 10% sodium hydroxide solution and water, and dried over anhydrous magnesium sulfate. Upon evaporation of the solvent, an oily liquid was obtained which was chromatographed over alumina. Elution with hexane and thereafter with 10%, 20% and 50% ether/hexane gave 89.1 g of an oil which was vacuum distilled.

1. additionAfter the addition
2. stirringstirring
3. waitwas continued for two hours at the same temperature
4. customThe reaction was then quenched with water
5. extractionthe organics were extracted into ether
6. washthe ether phase was washed with 10% sodium hydroxide solution and water
7. dry with materialdried over anhydrous magnesium sulfate
8. customUpon evaporation of the solvent
9. customan oily liquid was obtained which
10. customwas chromatographed over alumina
11. washElution with hexane