反应详情

1.5 g of cyanamide, 1.5 g of acetic acid, 2 g of Raney nickel (60%, aqueous), and 120 ml of methanol are introduced in an autoclave equipped with gas introduction stirrer. Under a hydrogen pressure of 4 bar and a temperature of 25° C., the cyanamide is hydrogenated quantitatively to the formamidine acetate. 40.8 g of 1-chloro-2,4-dinitrobenzene are then added to the autoclave, and the hydrogenation is carried out at a pressure of 10 bar and a temperature of 60° C. The hydrogenation time is 1 hour. 1-Chloro-2,4-diaminobenzene, 97.5% pure (analysed as 1-Chloro-2,4-acetamidobenzene by liquid chromatography), is obtained in quantitative yield.

1. customequipped with gas introduction stirrer
2. customa temperature of 25° C.
3. customa temperature of 60° C