反应详情

A solution of 2-acetylamino-4-(4-aminophenylsulfonylmethyl) thiazole (4.8 g) in a mixture of acetic acid (35 ml) and 6N-aqueous hydrochloric acid (10 ml) was refluxed for 2.5 hours with stirring. The reaction mixture was poured into ice-water and then the solution was adjusted to pH 8.0 using 10% aqueous sodium bicarbonate with stirring. The precipitates were collected by filtration, washed with water and dried in vacuo to give 2-amino-4-(4-aminophenylsulfonylmethyl)thiazole (2.50 g, yield: 60.2%).

1. temperaturewas refluxed for 2.5 hours
2. stirringwith stirring
3. filtrationThe precipitates were collected by filtration
4. washwashed with water
5. customdried in vacuo