反应详情

温度

110 °C

In a similar fashion, Pd(PPh3)4 (10 Mg, 0.009 mmol) was added to a solution of 2-trimethylstannyl-5-cyano-pyridine (22.7 mg, 0.085 mmol) and 3-(5-bromofuran-2-yl)-benzonitrile (31 mg, 0.125 mmol) in toluene (1 mL) under argon. The resulting solution was stirred at 110° C. for 15 h. After cooling to room temperature, the solvent was removed in vacuo. Chromatography (5g silica gel SPE tube, 50% chloroform in hexane to 20% ethyl acetate in 1:1 chloroform:hexane) followed by triturating with 50% dichloromethane in hexane afforded 5.3 mg (23%) of 3-(5-(5-cyano-2-pyridyl)-2-furyl)-benzonitrile (91% pure by GC/MS, contaminated by 9% dimer). 1H-NMR (CDCl3), δ (ppm): 8.85 (s, 1H), 7.87-8.05 (m, 5H), 7.52-7.63 (m, 3H), 7.36 (d, 1H), 6.95 (d, 1H), dimer impurity caused peak intensity to increase in region 8.00, 7.92, 7.49-7.57, plus 2 peaks additional peaks exactly overlapping with pure dimer @ δ (ppm): 6.87 (d) & 6.80 (d).

1. temperatureAfter cooling to room temperature
2. customthe solvent was removed in vacuo
3. customby triturating with 50% dichloromethane in hexane