4-Dimethylamino-1-trifluoroacetylpyridinium Trifluoroacetat: An Efficient Reagent for the Preparation of Trifluoromethyl-1,3-Dicarbonyl CompoundsEnamines 2 and O-trimethylsilyl ketene acetals 4 are trifluoroacetylated on reaction with the title reagent to yield trifluoroacetyl enamines 3 and trifluoromethylsilylenol ethers 5, respectively. Trifluoromethyl 1,3-diketones 6 and trifluoromethyl β-keto esters 7 are obtained by hydrolysis of compounds 3 and 5.
4-Dimethylamino-1-trifluoroacetylpyridinium Trifluoroacetat:烯胺 2 和 O-三甲基
硅酮
乙醛 4 在与标题试剂反应时发生三
氟乙酰化反应,分别生成三
氟乙酰基烯胺 3 和三
氟甲基
硅醇醚 5。化合物 3 和 5 经
水解可得到三
氟甲基 1,3-二酮 6 和三
氟甲基 δ-
酮酯 7。