反应详情

A mixture of 4-bromo-1-(difluoromethyl)-2-fluorobenzene (5.0 g, 22 mmol) and KCN (4.34 g, 67 mmol) was heated at 150° C. in NMP (50 mL) for 16 h. After trituration with a mixture of water, hexane, EtOAc and DCM, the organic layer was concentrated and purified by silica gel flash chromatography using hexanes:DCM (4:1 to 4:1.5 v/v) as mobile phase to yield the title compound: 1H NMR (500 MHz, CD2Cl2) δ 7.97 (s, 1H), 7.93 (d, J=8.5 Hz, 1H), 7.67 (d, J=8.5 Hz, 1H), 6.95 (t, J=54.5 Hz, 1H).

1. concentrationthe organic layer was concentrated
2. custompurified by silica gel flash chromatography