Substrate-controlled divergent remote C–H and N–H polyfluoroarylation of 2-aminopyrimidines with polyfluoroarenes via Pd(ii)/Pd(0) catalysis
摘要:
Substrate-controlled product divergence is demonstrated in Pd-catalyzed reaction of 2-aminopyrimidines. Remote C5–H polyfluoroarylation occurs with N-alkylpyrimidine-2-amines, while N–H polyfluoroarylation is dominant for N-aryl-pyrimidine-2-amines.
Weakly nucleophilic potassium aryltrifluoroborates in palladium-catalyzed Suzuki–Miyaura reactions: relative reactivity of K[4-RC6F4BF3] and the role of silver-assistance in acceleration of transmetallation
the synthesis of unsymmetrical polyfluoroaryl ethers via selective C4–F bond cleavage of pentafluorobenzene is reported. The reaction could proceed smoothly without the requirement of additional metals or ligands, and afford a series of the corresponding products in good to high yields. A wide variety of substituted phenols and alcohols provided 1,2,4,5-tetrafluoropheny ether derivatives in regioselective
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。
Synthesis of fluorinated aryl ethers via selective C–F functionalization with polyfluorobenzenes and carbonates under mild conditions
A facile and efficient method to synthesize fluorinated aryl ethers with polyfluorobenzenes and carbonates without metal catalyst has been developed. SelectiveC–Fbond and aryl fragment of carbonate participate in the reaction. The desired products were obtained in moderate to excellent yields with good substrates compatibility.