[CH2:1]([OH:5])[C:2](=[CH2:4])[CH3:3].Cl[C:7]1[CH:12]=[CH:11][C:10]([C:13]([F:16])([F:15])[F:14])=[CH:9][CH:8]=1.[OH-].[K+].O>S1(CCCC1)(=O)=O>[F:14][C:13]([F:16])([F:15])[C:10]1[CH:11]=[CH:12][C:7]([O:5][CH:1]=[C:2]([CH3:3])[CH3:4])=[CH:8][CH:9]=1A mixture of 50.48 g of methallyl alcohol, 63.2 g of 4-chlorobenzotrifluoride and 69 g of 85% flake potassium hydroxide in 175 ml sulpholane was stirred under nitrogen at 120°-145° C. for 21 hours. The mixture was then cooled, added to 200 ml water and extracted twice with 60°/80° petroleum ether. The solvent was removed and the residue was purified by fractionation to give isobutenyl 4-trifluoromethylphenyl ether, b.p.: 77°-77.5° C. at 8 Torr.
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