反应详情

温度

-15 °C

A slurry of 2.30 g (7.52 mmoles) of 4-(4-phenoxyphenyoxy)benzoic acid, 30 ml of thionyl chloride and 2 drops of N,N-dimethylformamide is refluxed under nitrogen atmosphere for 16 hours. Excess thionyl chloride is distilled off to yield an oil, and 200 ml of anhydrous n-hexane is added. The solution is cooled to -15° C., and the resulting precipitate is filtered and dried under nitrogen atmosphere. The precipitate is dissolved in a minimum volume of hot n-hexane, the solution is filtered, and the filtrate is cooled to -15° C. to yield 1.82 g (66 percent yield of 4-(4-phenoxyphenoxy)benzoyl chloride having a melting point of 85° C. to 89° C. by DSC measurement.

1. distillationExcess thionyl chloride is distilled off
2. customto yield an oil, and 200 ml of anhydrous n-hexane
3. additionis added
4. filtrationthe resulting precipitate is filtered
5. customdried under nitrogen atmosphere
6. dissolutionThe precipitate is dissolved in a minimum volume of hot n-hexane
7. filtrationthe solution is filtered
8. temperaturethe filtrate is cooled to -15° C.