反应详情

Dimethylsulfate (94.64 g) is added dropwise over a 40 minute period to a cooled stirred solution of 2,5-dichlorophenol (122.25 g) and sodium hydroxide (31.5 g) in water (300 ml). This mixture is stirred at room temperature for one hour, then at reflux for 2 hours, then cooled to room temperature. The organic layer is separated and combined with ether extracts of the remaining aqueous layer. The ether solution is dried (saturated NaCl, Na2SO4, K2CO3) and the ether removed to give 2,5-dichloroanisole. Distillation gives a colorless liquid (115° C. at aspirator vacuum).

1. temperatureat reflux for 2 hours
2. temperaturecooled to room temperature
3. customThe organic layer is separated
4. dry with materialThe ether solution is dried (saturated NaCl, Na2SO4, K2CO3)
5. customthe ether removed