反应详情

To a solution of 1-bromo-3,5-dichlorobenzene (1 g, 4.4 mmol) in anhydrous THF (10 mL) was added n-BuLi (339 mg, 5.3 mmol) at −78° C. After being stirred for 30 minutes, a solution of N-methoxy-N-methyl-2-phenyl-acetamide (prepared following step 1 of Intermediate 4) (790 mg, 4.4 mmol) in THF (5 mL) was added, and the mixture was stirred for 3 hours. When TLC indicated that starting material was consumed, the reaction mixture was diluted with water (50 mL), and extracted with EtOAc (20 mL×3). The combined organic layer was dried over Na2SO4, concentrated in vacuum, and purified by column chromatography (PE:EtOAc=50:1) to afford 1-(3,5-dichlorophenyl)-2-phenylethanone (213 mg, yield 19.4%).

1. stirringthe mixture was stirred for 3 hours
2. customwas consumed
3. additionthe reaction mixture was diluted with water (50 mL)
4. extractionextracted with EtOAc (20 mL×3)
5. dry with materialThe combined organic layer was dried over Na2SO4
6. concentrationconcentrated in vacuum
7. custompurified by column chromatography (PE:EtOAc=50:1)