2,4-二氯-N-乙酰苯胺

反应条件: temp:50.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a solution of 2,4-dichloroaniline (42.0 g, 260 mmol) in AcOH (40.0 mL) is added Ac2O (80 mL). The reaction mixture is warmed up to 50° C. and stirred at this temperature for 1 hour. The reaction is cooled to room temperature and poured into ice water (500 mL). A solid precipitated and the mixture is stirred for additional 1 hour at room temperature. The solid is filtered and washed with water, hexanes and air dried to give N-(2,4-dichlorophenyl)acetamide. The reaction is cooled to room temperature A solid precipitated the mixture is stirred for additional 1 hour at room temperature The solid is filtered washed with water, hexanes and air dried

反应条件: temp:130.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: 204 parts of the crude 2,4-dichloroacetanilide are added to 300 parts of 100% strength sulfuric acid, while stirring. Thereafter, the mixture is heated further to 130° C., and 235 parts of chlorosulfonic acid are added dropwise at this temperature in such a manner that the hydrogen chloride gas liberated can readily be removed. Stirring is then continued at from 135° to 140° C. until the sulfonation is complete, this taking about 1 hour. The mixture is then left to cool to 50°-80° C., and is poured into 1300 parts by volume of water. After steam distillation for a short time, 10 parts of pure 2,4,6-trichloroaniline are obtained, as a by-product, in the distillate. The reaction mixture is then cooled to room temperature, and precipitated 2,4-dichloroaniline-6-sulfonic acid is filtered off and washed with dilute hydrochloric acid. 204 parts of 2,4-dichloroaniline-6-sulfonic acid (calculated as 100% pure) are obtained as a colorless aqueous paste, which can be used in moist form for diazotizations. H-NMR in D2O: 7.3 ppm, 7.6 ppm, J: 3 Hz (as the ammonium salt). liberated can readily be removed Stirring is then continued at from 135° to 140° C. until the sulfonation The mixture is then left to cool to 50°-80° C. is poured into 1300 parts by volume of water After steam distillation for a short time, 10 parts of pure 2,4,6-trichloroaniline are obtained, as a by-product, in the distillate The reaction mixture is then cooled to room temperature precipitated 2,4-dichloroaniline-6-sulfonic acid is filtered off washed with dilute hydrochloric acid

反应条件: temp:50.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a solution of 2,4-dichloroaniline (42.0 g, 260 mmol) in AcOH (40.0 mL) is added Ac2O (80 mL). The reaction mixture is warmed up to 50° C. and stirred at this temperature for 1 hour. The reaction is cooled to room temperature and poured into ice water (500 mL). A solid precipitated and the mixture is stirred for additional 1 hour at room temperature. The solid is filtered and washed with water, hexanes and air dried to give N-(2,4-dichlorophenyl)acetamide. The reaction is cooled to room temperature A solid precipitated the mixture is stirred for additional 1 hour at room temperature The solid is filtered washed with water, hexanes and air dried