Chemoselective Trifluoromethylation of Methyl Esters Using an Et<sub>3</sub>GeNa/C<sub>6</sub>H<sub>5</sub>SCF<sub>3</sub> Combination: Efficient Synthesis of Trifluoromethyl Ketones
作者:Yasuo Yokoyama、Kunio Mochida
DOI:10.1055/s-1997-961
日期:1997.8
Various trifluoromethyl ketones were synthesized from the corresponding methyl esters by effective nucleophilic trifluoromethylation using an Et3GeNa/C6H5SCF3 combination. This trifluoromethylation proceeded chemoselectively. When, cyclohexyl, i-propyl and t-butyl esters coexisted in the reaction system, only the methyl ester was easily transformed to the desired compounds in excellent yield. Furthermore, some protective groups were remained under this reaction condition.
通过使用Et3GeNa/C6H5SCF3组合进行有效的亲核三氟甲基化反应,从相应的甲酯合成出多种三氟甲基酮。这种三氟甲基化反应具有化学选择性,当反应体系中同时存在环己基、异丙基和叔丁基酯时,只有甲酯可以轻松转化为目标产物,且产率极佳。此外,在这种反应条件下,一些保护基团得以保留。