反应详情

温度

100 °C

2-aminopyridine (500 mg, 5.31 mmol) and ethyl chloroacetoacetate (870 mg, 5.31 mmol) were dissolved in DMSO and heated to 100° C. for 1 h under inert atmosphere. After 1 h, water added to reaction mixture followed by Work-up (H2O/AcOEt) and purification on 60-120 mesh silicagel using AcOEt and petroleum ether (30:70) gave the title compound (110 mg) as a brown liquid. 1H-NMR (δ ppm, CDCl3, 400 MHz): 8.06 (d, J 6.7, 1H), 7.59 (s, 1H), 7.55 (d, J 9.4, 1H), 7.14 (t, J 7.9, 1H), 6.75 (t, J 6.7, 1H), 4.12 (q, J 7.1, 2H), 3.87 (s, 2H), 1.3 (t, J 7.1, 3H).

1. customfollowed by Work-up (H2O/AcOEt) and purification on 60-120 mesh silicagel