反应详情

温度

12.5 °C

3-(2-methylbenzoylamino)toluene (80 g) is dissolved in acetic acid (500 mL), and thereto is added a solution of bromine (19.0 ml) in acetic acid (40 mL) with stirring under ice cooling over a period of about one hour. During which the mixture is cooled at an inner temperature of below 20° C. (mean inner temperature: 10-15° C.) since the temperature raises. The reaction mixture is continuously stirred overnight. The resulting suspension is added to ice-water, and the resulting crystals are taken by filtration, washed with water, and dried at 60° C. The resultant is recrystallized from methanol-water to give 2-bromo-5-(2-methylbenzoylamino)toluene (105.0 g), white needles (yield 97%, Mp 144.5-146.0° C.)

1. temperatureraises
2. waitThe reaction mixture is continuously stirred overnight
3. filtrationthe resulting crystals are taken by filtration
4. washwashed with water
5. customdried at 60° C
6. customThe resultant is recrystallized from methanol-water