反应详情

A solution of 4-methoxybenzylamine (0.756 g, 5.51 mmol) in acetonitrile (2 mL) was added to a mixture of 2-bromo-4-chloro-5-nitropyridine (1.19 g, 5.01 mmol) and triethylamine (0.768 mL, 5.51 mmol) in acetonitrile (8 mL). After stirring for 1.5 hours, the solution was diluted with ethyl acetate (100 mL) which was then washed successively with water and brine before being concentrated in vacuo to a light brown oil which solidified on standing to give the title compound (1.31 g, 3.87 mmol, 77%). 1H NMR (d6-DMSO, 400 MHz) δ 9.00 (br t, 1H, J=6.3 Hz), 8.80 (s, 1H), 7.35 (d, 2H, J=8.7 Hz), 7.10 (s, 1H), 6.95 (d, 2H, J=8.8 Hz), 4.60 (d, 2H, J=6.0 Hz), 3.70 (s, 3H). LCMS (1) Rt=2.13 min; m/z (ESI−) 336, 338 (M−H).

1. washwas then washed successively with water and brine
2. concentrationbefore being concentrated in vacuo to a light brown oil which