反应详情

温度

120 °C

3-Bromo-2-methyl-pyridine (1.0 g, 5.80 mmol) in 15 mL dry toluene was treated with benzophenone hydrazone (1.25 g, 6.39 mmol), 4,5-Bis(diphenylphosphino)-9,9-dimethylxanthene (170 mg, 0.29 mmol), sodium tert-butoxide (835 mg, 8.70 mmol), and Pd(II)(OAc)2 (67 mg, 0.30 mmol). Heated to 120° C. in the microwave for five minutes. Extracted using EtOAc/H2O (3×100 mL EtOAc, 1×100 mL H2O, lx 100 mL brine). Dried using Na2SO4 and then purified by flash chromatography (silica, 10-50% EtOAc/Hexane) to afford 3-(2-(diphenylmethylene)hydrazinyl)-2-methylpyridine (1.25 g, 4.35 mmol, 75%). 1H NMR (300 MHz, DMSO-d6) δ 7.95 (d, 1H), 7.85 (d, 1H), 7.70-7.53 (m, 6H), 7.45-7.34 (m, 5H), 7.20 (d, 1H), 2.07 (s, 3H); LC-MS (ESI) m/z 288 (M+H)+.

1. extractionExtracted
2. customDried
3. custompurified by flash chromatography (silica, 10-50% EtOAc/Hexane)