反应详情

温度

4 °C

A jacketed kettle was equipped with a chiller, overhead stirrer, thermometer, and connections to a chlorine tank and a caustic scrubber. The kettle was charged with the previously prepared 3-chloro-4-methylbenzoyl chloride (1 part) and dichloromethane (6.8 parts). Aluminum trichloride (0.8 parts) was added, and the resulting red-brown mixture was cooled with agitation to 3-5° C. Chlorine (0.37 parts) was introduced at a sufficient rate to keep the reaction temperature below 10° C. The reactor was held at 0-5° C. for 6 hours. The reaction mixture was purged with nitrogen and slowly quenched by transfering into an agitated and chilled hydrochloric acid solution (4.4 parts) while maintaining the temperature below 5° C. Agitation was stopped and the lower organic layer was recovered. The solvent was removed by distillation.

1. customA jacketed kettle was equipped with a chiller, overhead stirrer
2. customthe reaction temperature below 10° C
3. customThe reaction mixture was purged with nitrogen
4. customslowly quenched
5. temperaturechilled hydrochloric acid solution (4.4 parts)
6. temperaturewhile maintaining the temperature below 5° C
7. customthe lower organic layer was recovered
8. customThe solvent was removed by distillation