A concise and efficient method for the synthesis of polyfluorinated aromaticethers and thioethers by synergistic cleavage of C-B bond and C-F bond of B(C6F5)3 is reported. The reaction could proceed smoothly with excellent functional-group compatibility. In addition, the transformation represents the first general application of B(C6F5)3 as reaction partners in cross-coupling reaction.
报道了一种通过协同裂解 B(C 6 F 5 ) 3的 CB 键和 CF 键合成多氟芳族醚和硫醚的简洁有效的方法。反应可以顺利进行,具有良好的官能团相容性。此外,该转变代表了 B(C 6 F 5 ) 3作为交叉偶联反应中的反应伙伴的首次普遍应用。
Synthesis of polyfluorinated aryl ethers via ligand-free palladium-catalyzed CF activation of pentafluorobenzene
An efficient, ligand-free palladium-catalyzed method for the cross coupling reaction of pentafluor-benzene with phenols was developed. This reaction proceeds via a highly selective C-F bond activation in the 3-position and is compatible with a variety of functional groups, delivering polyfluorinated aryl ethers in moderate to excellent yields. (C) 2013 Elsevier B.V. All rights reserved.
Selective C4−F bond cleavage/C−O bond formation of polyfluoroarenes with phenols and benzyl alcohols
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
Palladium-catalyzed enantioselective dominoHeck/intramolecular C–H functionalization reaction, as a valuable strategy for creating molecular diversity, has remained a prominent challenge. Here, we describe a Pd/XuPhos catalyst for asymmetric dominoHeck/intermolecular C–H alkylation of unactivated alkenes with diverse polyfluoro- and heteroarenes in a highly chemo- and enantioselective manner. This