反应详情

Ethyl 1-(4-ethoxyphenyl)-2,2,3,3-tetrafluorocyclobutane carboxylate (14.5 g) was dissolved in ethanol (100 ml) and a 10% w/w solution of sodium hydroxide in water (100 ml) was added and the mixture refluxed for 2.5 hours. The mixture was cooled, added to ice water and extracted with diethyl ether. The aqueous layer was acidified and the precipitate was filtered off, washed with water, dried and crystallised from 60°-80° petroleum ether to give the acid mp 112°-3° C. Yield 11.2 g (85%). Analysis: C: 53.20% H: 4.22%, F: 25.9%. C13H12F4O3 requires C: 53.43% H: 4.14% F: 26.0%.

1. temperaturethe mixture refluxed for 2.5 hours
2. temperatureThe mixture was cooled
3. extractionextracted with diethyl ether
4. filtrationthe precipitate was filtered off
5. washwashed with water
6. customdried
7. customcrystallised from 60°-80° petroleum ether
8. customto give the acid mp 112°-3° C