反应详情

温度

100 °C

99.4 g (0.3 mol) of 3-phenylthiophthalic acid N-phenylimide are suspended in 1,326 ml of a 20% sodium hydroxide solution and the suspension is heated at 100° C. for 30 minutes, with stirring. After cooling, the alkaline suspension is acidified with 672 ml of 37% hydrochloric acid, with stirring. After one hour the fine suspension is filtered with suction, the material on the suction filter is suspended, whilst till wet, in 882 ml of 37% hydrochloric acid and the suspension is refluxed for one hour. The reaction mixture is cooled, the resulting fine suspension is filtered with suction and the product is dried at 80° C./13,000 Pa. 69.4 g (85 of theory) of 3-phenylthiophthalic acid are obtained.

1. temperatureAfter cooling
2. stirringwith stirring
3. filtrationAfter one hour the fine suspension is filtered with suction
4. filtrationthe material on the suction filter
5. temperaturewhilst till wet, in 882 ml of 37% hydrochloric acid and the suspension is refluxed for one hour
6. temperatureThe reaction mixture is cooled
7. filtrationthe resulting fine suspension is filtered with suction
8. customthe product is dried at 80° C./13,000 Pa