反应详情

温度

140 °C

Grind benzothiazolinone (10 g) and benzoic acid (9.7 g) in a mortar. Introduce the preparation into a flask and add polyphosphoric acid (100 g). Heat at 140° C. for 4 hours with mechanical stirring. Hydrolyse the reaction mixture in ice. Remove the resulting precipitate by filtration, wash it with ether and recrystallise from a 4/6 cyclohexane/toluene mixture.

1. additionIntroduce
2. customthe preparation into a flask
3. customRemove the resulting precipitate
4. filtrationby filtration
5. washwash it with ether
6. customrecrystallise from a 4/6 cyclohexane/toluene mixture