反应详情

To a solution of 3-bromo-6-chloro-N-methoxy-N-methylpicolinamide (5.34 g, 19.1 mmol) in anhydrous THF (38 mL) at 0° C. was slowly added a solution of (4-chlorophenyl)magnesium bromide (1M in Et2O) (76 mL, 76 mmol). After 3 h at 0° C., a saturated aqueous solution of ammonium chloride was added and the product was extracted with MTBE (repeated 4 times). The organic layers were combined, dried over Na2SO4 and concentrated to dryness. The residue was purified by flash chromatography (hexane/EtOAc 10:0 to 8:2) to give the title compound as a white solid (5.98 g). LC/MS m/z 332 [M+H]+.

1. extractionthe product was extracted with MTBE (repeated 4 times)
2. dry with materialdried over Na2SO4
3. concentrationconcentrated to dryness
4. customThe residue was purified by flash chromatography (hexane/EtOAc 10:0 to 8:2)