perfluoroalkyl iodides with silyl enol ethers mediated by Et3B in the presence of base such as 2,6-dimethylpyridine provides mixtures of perfluoroalkylated trialkylsilyl enol ethers and α-perfluoroalkylated ketones. The yield and distribution of the products heavily depend on the nature of base employed. Treatment of a reaction mixture consisting of perfluoroalkylated silyl enol ether and α-perfluoroalkylated
1<i>H</i>,1<i>H</i>-Perfluoroalkylation of Enol Silyl Ethers with (1<i>H</i>,1<i>H</i>-Perfluoroalkyl)phenyliodonium Triflates. A New Method for the Preparation of β- and δ-Trifluoromethyl Carbonyl Compounds and Their Higher Perfluoroalkyl Homologues
作者:Teruo Umemoto、Yoshihiko Gotoh
DOI:10.1246/bcsj.60.3823
日期:1987.10
triflates was promoted successfully by potassium fluoride in dichloromethane at room temperature, giving β-perfluoroalkyl (Rf; CF3, C2F5, i-C3F7, n-C7F15) carbonyl compounds in good yields. An enol silyl ether of an α,β-unsaturated carbonyl compound gave a δ-Rf-α,β-unsaturated carbonyl compound selectively.