反应详情

Ethyl 2-(4-chlorophenylamino)acetate (A) (25.6 g, 120 mmol) and hydrazine monohydrate (7.0 mL, 144 mmol) were heated to reflux in ethanol (120 mL) for 22 hours. After concentration in vacuo, the solid obtained was recrystallised from ethanol to yield the title compound (14.0 g, 59%) as a pale brown powder. 1H NMR (400 MHz, CDCl3) δ 3.85 (2H, d), 4.18 (2H, br), 6.53 (2H, d), 7.16 (2H, d), 7.60 (1H, br).

1. concentrationAfter concentration in vacuo
2. customthe solid obtained
3. customwas recrystallised from ethanol