反应详情

温度

-78 °C

2-(4-bromo-3-methylphenyl)-2-methylpropanenitrile (3.31 g, 13.9 mmol) is dissolved in dry THF (80 mL). The mixture is cooled to −78° C. and tert-BuLi (1.7 M in pentane, 18 mL, 30.6 mmol) is added. After 30 minutes, the reaction is quenched with DMF (10 mL), volatiles are evaporated and the residue purified by normal phase MPLC (SiO2, heptane to heptane/EtOAc 3:1), giving 2-(4-formyl-3-methylphenyl)-2-methylpropanenitrile (1.89 g, 10.2 mmol, 73%) as a colorless liquid. 1H NMR (400 MHz, DMSO-D6) δ ppm 1.70 (s, 6H) 2.64 (s, 3H) 7.49 (s, 1H) 7.55 (dd, J=8.01, 2.15 Hz, 1H) 7.86 (d, J=7.81 Hz, 1H) 10.22 (s, 1H).

1. customthe reaction is quenched with DMF (10 mL), volatiles
2. customare evaporated
3. customthe residue purified by normal phase MPLC (SiO2, heptane to heptane/EtOAc 3:1)