A simple aromatic nucleophilic monosubstitution reaction for the synthesis of N-tetrafluoroarylated heterocycliccompounds via selective C4–F bond cleavage of pentafluorobenzene with N–H containing heterocycles is demonstrated. This method is highly tolerant of a wide range of substrates to give the corresponding products in moderate to good yields. Additionally, this strategy is applied to synthesize
A novel dehydrogenativecoupling reaction of N-fluorocarboxamides with polyfluoroarenes forming C(sp2)–C(sp3) bonds enabled by copper catalysis has been accomplished. N-Fluorocarboxamides are postulated to undergo copper-mediated dehydrogenative cross-coupling reaction with electron-deficient polyfluoroarenes via a radicalpathway. Benzylic C–H bonds and aliphatic C–H bonds in N-fluorocarboxamides
Copper-Catalyzed Direct C–H Alkylation of Polyfluoroarenes by Using Hydrocarbons as an Alkylating Source
作者:Weilong Xie、Joon Heo、Dongwook Kim、Sukbok Chang
DOI:10.1021/jacs.0c00169
日期:2020.4.22
Construction of carbon-carbon bonds is one of the most important tools in chemical synthesis. In the previously established cross-coupling reactions, prefunctionalized starting materials are employed usually in the form of aryl- or alkyl (pseudo)halides or their metallated derivatives. However, direct use of arenes and alkanes via a twofold oxidative C-H bond activation strategy to access chemoselective C(sp2)-C(sp3)