Copper-Catalyzed Formal Dehydrogenative Coupling of Carbonyls with Polyfluoroarenes Leading to β-C–H Arylation
作者:Weilong Xie、Dongwook Kim、Sukbok Chang
DOI:10.1021/jacs.0c10904
日期:2020.12.9
We herein communicate a formal dehydrogenativecoupling of carbonyls with polyfluoroarenes enabled by Cu catalysis. Silyl enol ethers initially prepared from carbonyls are postulated to undergo the copper-mediated oxidative dehydrogenativecoupling with polyfluoroarenes via a radicalpathway. Including cyclic and linear ketones, aldehydes, and esters, a broad range of β-aryl carbonyl products were
我们在此交流了通过 Cu 催化实现的羰基与多氟芳烃的正式脱氢偶联。假设最初由羰基化合物制备的甲硅烷基烯醇醚通过自由基途径与多氟芳烃进行铜介导的氧化脱氢偶联。包括环状和线性酮、醛和酯在内,以高区域和立体选择性和优异的官能团耐受性有效地获得了广泛的 β-芳基羰基产物。
Selective C4–F bond cleavage of pentafluorobenzene: synthesis of N-tetrafluoroarylated heterocyclic compounds
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
Sequential Direct S<sub>N</sub>Ar Reactions of Pentafluorobenzenes with Azole or Indole Derivatives
作者:Frederik Diness、Mikael Begtrup
DOI:10.1021/ol5012554
日期:2014.6.6
Sequential regioselective N-arylations through high-yielding catalyst-free direct SNAr reactions of pentafluorobenzene derivatives with azole or indole derivatives are described. The N-arylated derivatives were further functionalized through a microwave-assisted cross-coupling reaction via C–H bond activation or Suzuki conditions. The order of the reactions could be reversed, proving full orthogonality
描述了通过五氟苯衍生物与唑或吲哚衍生物的高产率,无催化剂的直接S N Ar反应进行的顺序区域选择性N-芳基化。所述Ñ -arylated衍生物通过通过C-H键活化或Suzuki条件微波辅助交叉偶联反应进一步官能化。反应的顺序可以颠倒,证明反应之间完全正交,从而导致定义明确的完全取代的苯衍生物。