反应详情

At 0° C., bromine (78 mg, 0.49 mmol) in acetic acid (0.3 mL) was added dropwise to 2-methyl-6-pyridin-2-ylisoquinolin-1-one (115 mg, 0.49 mmol) in acetic acid (20 mL). The mixture was stirred at room temperature for 20 min. Extractive work up with CH2Cl2 and purification by silica gel chromatography (PE:EA=5:1-1:1) gave the title compound (73.0 mg, 47.7%) as a yellow solid. 1H NMR (CDCl3, 400 MHz) δ 8.79 (d, J=4.4 Hz, 1H), 8.55 (d, J=8.4 Hz, 1H), 8.44 (s, 1H), 8.19 (d, J=8.8 Hz, 1H), 7.90 (d, J=8.0 Hz, 1H), 7.85 (t, J=7.2 Hz, 1H), 7.42 (s, 1H), 7.36-7.34 (m, 1H), 3.64 (s, 3H). LCMS: 314.9 (M+H)+

1. customExtractive work up with CH2Cl2 and purification by silica gel chromatography (PE:EA=5:1-1:1)