Copper(I) Salt Catalyzed Reaction of 1,1,1-Trichloro-2,2,2-trifluoroethane with Trimethylsilyl Enol Ethers. A Convenient Synthesis of β-Chloro-β-(trifluoromethyl) α,β-Unsaturated Carbonyl Compounds
作者:Takashi Okano、Toru Uekawa、Shoji Eguchi
DOI:10.1246/bcsj.62.2575
日期:1989.8
β-Chloro-β-(trifluoromethyl) α,β-unsaturated carbonyl compounds were obtained by the reaction of trimethylsilyl enol ethers with CF3CCl3 and CuCl, followed by dehydrochlorination with triethylamine or DBN. Aromatic enol ethers gave moderate to good yields of the chloro(trifluoromethyl)methylene ketone derivatives but aliphatic enol ethers and silyl ketene acetal gave only lower yields.
β-氯-β-(三氟甲基)α,β-不饱和羰基化合物由三甲基甲硅烷基烯醇醚与CF3CCl3和CuCl反应,然后用三乙胺或DBN脱氯化氢得到。芳族烯醇醚产生中等至良好的氯(三氟甲基)亚甲基酮衍生物产率,但脂族烯醇醚和甲硅烷基乙烯酮缩醛仅产生较低的产率。