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- W2390788976 abstract "A simple and effective method to prepare 2,2,2-trifluoroethyl ethers via direct nucleophilic substitution was introduced.Some trifluoroethyl aryl derivatives were obtained from the aryl derivatives with sodium 2,2,2-trifluoroethylate in the presence of CuI.Some trifluoethoxylpyridine ether derivatives were successfully synthesized by reacting 4-nitro-pyridine-N-oxide derivatives with trifluoroethanol in the presence of alkali.Especially the yield of 4-(2,2,2-trifluoroethoxy) phenol,which has not been reported in literature up to now,can reach 83.6%.The products were determined by 1H NMR,IR,MS and elemental analysis.The effects of catalyst amount,solvent and temperature on the trifluoroethylation reaction of 4-bromophenol were discussed,the yield was 85.93% when the molar ratio of 4-bromophenol and CuI was 1∶4,in DMAC at 130 ℃;the effects of alkali amount and temperature on the trifluoroethylation reaction of 2,3-dimethyl-4-nitropyridine-N-oxide were also discussed.The yield was 89.5% when mass ratio of trifluoroethanol and potassium hydroxide was 10∶1,and the temperature was 90 ℃." @default.
- W2390788976 created "2016-06-24" @default.
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- W2390788976 date "2008-01-01" @default.
- W2390788976 modified "2023-10-15" @default.
- W2390788976 title "Preparation of Aryltrifluoroethyl Ether Derivatives" @default.
- W2390788976 hasPublicationYear "2008" @default.
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