反应详情

A mixture of 3-nitrostyrene (5.36 ml), 3,5-dibromopyridine (10.0 g), palladium(II) acetate (259 mg), tetra-n-butylammonium chloride (10.7 g) and sodium bicarbonate (8.07 g) in N,N-dimethylformamide (50 ml) was stirred at 120pbC. for 4 hours. The mixture was poured into sodium bicarbonate solution and extracted with ethyl acetate twice. The combined organic solution was washed with sodium bicarbonate solution and brine, dried over magnesium sulfate and concentrated. The resultant solid was washed with diisopropyl ether to give 3-bromo-5-[(E)-2-(3-nitrophenyl)vinyl]pyridine (5.74 g).

1. extractionextracted with ethyl acetate twice
2. washThe combined organic solution was washed with sodium bicarbonate solution and brine
3. dry with materialdried over magnesium sulfate
4. concentrationconcentrated
5. washThe resultant solid was washed with diisopropyl ether