反应详情

A 1000 ml 3-neck flask, equipped with a Dean-Stark water trap and a mechanical stirrer, was charged with 102 g (10% molar excess) of chlorendic anhydride, 400 ml toluene and 300 ml of dry dioxane. Thirty-one grams of 4-mercaptoaniline were then added to the resultant solution, whereupon a pale yellow solid formed instantly. The reaction mixture was heated gradually until the solvent began to reflux, at which point the evolution of water commenced and the solid disappeared. About 4.5 ml of water were collected in about 3 hours. Solvent was then distilled to reduce the volume to about one-half its original volume. The resultant solution, when cooled to room temperature, deposited white crystals of the carboximide. The crystals were separated by filtration and dried overnight at room temperature. The melting point of the carboximide was 237°-240° C.

1. customformed instantly
2. temperatureThe reaction mixture was heated gradually until the solvent
3. temperatureto reflux, at which
4. customAbout 4.5 ml of water were collected in about 3 hours
5. distillationSolvent was then distilled
6. customThe crystals were separated by filtration
7. customdried overnight at room temperature
8. customwas 237°-240° C.