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Nickel-Catalyzed Cross-Coupling of Alkyl Zinc Halides for the Formation of C(sp(2))-C(sp(3)) Bonds: Scope and Mechanism

机译:镍催化的烷基卤化锌交叉偶联形成C(sp(2))-C(sp(3))键:范围和机理

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摘要

Optimal conditions for a general Ni-catalysed Negishi cross-coupling of alkyl zinc halides with aryl, heteroaryl and alkenyl halides have been determined. These conditions allow the reaction to take place smoothly, with low catalyst loading, and in the presence of a wide variety of functional groups to afford products in good yields at room temperature. DFT studies on the mechanism support the occurrence of a catalytic cycle involving transmetalation of the alkyl zinc halide to Ni-I followed by oxidative addition of the haloarene and C-C reductive elimination.
机译:已经确定了烷基镍卤化物与芳基,杂芳基和烯基卤化物的一般的Ni催化的Negishi交叉偶联的最佳条件。这些条件使反应能够在低催化剂负载下并且在多种官能团的存在下平稳地进行,从而在室温下以高收率提供产物。关于该机理的DFT研究支持了催化循环的发生,该催化循环包括将烷基卤化锌转金属为Ni-I,然后氧化卤代芳烃并进行C-C还原消除。

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