反应详情

Pyridine-3-boronic acid (5.81 g, 47.27 mmol, Frontier Scientific, Inc.), 1,3-dimethoxy-2-(tol-2-yl)-4-bromobenzene (2) (10.7 g, 34.8mmol), glyme (200 mL), and tetrakis(triphenylphosphine) palladium (Ph3P)4Pdo (4 g, 3.46 mmol) were stirred for 15 minutes followed by the addition of potassium carbonate (16 g in 70 ml of water). After refluxing for 10 hr, the reaction mixture was poured into 800 ml of 1:1 mixture of water and ethyl acetate. The organic layer was washed with water (300 ml×2) and brine (200 ml), the solvent was removed, and the crude product was purified by silica-gel chromatography eluting with hexane and ethyl acetate (10% to 25% ethyl acetate) yielding 8.8 g (83%) of 3.

1. temperatureAfter refluxing for 10 hr
2. washThe organic layer was washed with water (300 ml×2) and brine (200 ml)
3. customthe solvent was removed
4. customthe crude product was purified by silica-gel chromatography
5. washeluting with hexane and ethyl acetate (10% to 25% ethyl acetate)