Regioselective C–S bond formation accomplished by copper-catalyzed regioselective C–F substitution of perfluoroarenes with aryl thioacetates or benzyl thioacetate
摘要:
Practical and straightforward method for regioselective C-S bond formation accomplished by copper-catalyzed regioselective C-F substitution of electron-deficient perfluoroarenes with aryl thioacetates or benzyl thioacetate has been developed. Because of its high reaction efficiency, good chemoselectivity and regioselectivity, and excellent functional-group compatibility, this protocol provides a useful and operationally simple access to polyfluoroaryl thioethers used for drugs and material chemistry. (C) 2012 Elsevier Ltd. All rights reserved.
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。
Regioselective C-S Bond Formation Accomplished by Regioselective C-F Substitution of Polyfluoroarenes with Substituted Thiophenols
The nucleophilic aromatic substitutionreaction of pentafluorobenzene, methyl 2,3,4,5-tetrafluorobenzoic acid ester and 1,2,4,5-tetrafluorobenzene with substituted thiophenols showed good regioselectivity while pentafluorobenzene gave high yields. The computational results suggest that the specificity difference between polyfluorobenzenes originates from their electronic properties.