Copper-Mediated Trifluoromethylation of α-Diazo Esters with TMSCF<sub>3</sub>: The Important Role of Water as a Promoter
作者:Mingyou Hu、Chuanfa Ni、Jinbo Hu
DOI:10.1021/ja307058c
日期:2012.9.19
Copper-mediated trifluoromethylation of α-diazo esters with TMSCF(3) reagent has been developed as a new method to prepare α-trifluoromethyl esters. This trifluoromethylation reaction represents the first example of fluoroalkylation of a non-fluorinated carbene precursor. Water plays an important role in promoting the reaction by activating the "CuCF(3)" species prepared from CuI/TMSCF(3)/CsF (1.0:1
铜介导的 α-重氮酯与 TMSCF(3) 试剂的三氟甲基化已被开发作为制备 α-三氟甲酯的新方法。这种三氟甲基化反应代表了非氟化卡宾前体氟烷基化的第一个例子。水通过激活由 CuI/TMSCF(3)/CsF (1.0:1.1:1.1) 制备的“CuCF(3)”物种,在促进反应中发挥重要作用。这种三氟甲基化反应的范围很广,在合成各种芳基、苄基和烷基取代的 3,3,3-三氟丙酸酯中证明了其效率。