43156-47-4

1635-61-6

108-98-5

43156-47-4

In an autoclave, 255 g of 5-chloro-2-nitroaniline (78.3% purity) was suspended in 250 mL of isopropanol. After warming the reaction system to 60 °C, 95.7 g of liquid ammonia was slowly pumped into the autoclave to bring the system pressure to 9 bar. this temperature was maintained, and 161 g of phenylthiophenol (98% purity) was added dropwise at a uniform rate over a period of 1.5 h, while the reaction pressure was controlled at a constant level of 9 bar by replenishing ammonia. after 6 h, the autoclave was cooled down to room temperature and slowly relieved of pressure. The reaction mixture was separated by filtration and the autoclave was rinsed with isopropyl alcohol and the rinsate was combined with the filtrate. The combined organic phases were washed with water and dried to obtain 298.6 g of the yellow powdery product 2-nitro-5-(phenylthio)aniline, which was analyzed by HPLC with a purity of 91.2% and a yield of 96.4% of the theoretical value.