反应详情

A solution of 4-amino-2-chloro-5-nitropyridine (4) (1.0 g, 5.76 mmol) in 50 ml 28% NH4OH was heated in a sealed tube at 120° C. for overnight. After cooling the reaction mixture to room temperature afforded orange red solid 5 (0.770 g, 77%). 1H NMR (DMSO-d6, 500 MHz): δ 8.66 (1H, s), 7.35 (1H, br s), 6.73 (1H, brs), 5.67 (1H, s); EIMS m/z: 155.2 (M+1), 153.2 (M−1)