反应详情

While a solution of 2-chloro-4-cyanophenol (50 g) and epichlorohydrin (60.3 g) in ethanol (55 ml) was refluxed, a solution of potassium hydroxide (21.9 g) in ethanol (90 ml) was added dropwise over a period of 40 minutes and the reaction mixture was further refluxed for 100 minutes. After the mixture was cooled, water (50 ml) was added thereto and it was neutralized with 1N hydrochloric acid. After the solvent was distilled off, the residue was extracted with diethyl ether. The extract was dried (over magnesium sulfate) and the diethyl ether was distilled off. The residue was distilled under reduced pressure to give 27 g of 3-chloro-4-(2,3-epoxy)propylbenzonitrile as a colorless oil. After crystallization, the crystals are recrystallized from isopropyl ether-ethyl acetate to give colorless needles. m.p. 71.0°-71.8° C.

1. temperaturethe reaction mixture was further refluxed for 100 minutes
2. temperatureAfter the mixture was cooled
3. distillationAfter the solvent was distilled off
4. extractionthe residue was extracted with diethyl ether
5. dry with materialThe extract was dried (over magnesium sulfate)
6. distillationthe diethyl ether was distilled off
7. distillationThe residue was distilled under reduced pressure