Fluorinated imidazo[1,5-a]pyridine abnormal carbene ruthenium complexes (F-aImPy–Ru) with a tricyclohexylphosphine copper chloride (Cy₃P–CuCl) cocatalyst were developed for the ethenolysis/propenolysis of methyl oleate. These catalysts showed remarkable catalytic efficiencies (turnover numbers of 100,000 for ethenolysis and 200,000 for propenolysis) and excellent α-olefin selectivity (up to 99%). A computational study indicated that the energy barrier of the β-hydride elimination pathway in the presence of a phosphine–copper cocatalyst is higher than that in the absence of the cocatalyst, which might contribute to the improved longevity of the ruthenium catalyst in the reaction.

中文翻译：

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N-杂环碳钌配合物与膦-铜助催化剂结合催化高效油酸甲酯和丙烯酰胺的前驱

氟代咪唑并[1,5- a ]吡啶异常碳烯钌配合物（F-aImPy-Ru）与三环己基膦氯化铜（Cy ₃ P-CuCl）助催化剂被开发用于油酸甲酯的乙烯化/脱丙烯反应。这些催化剂显示出显着的催化效率（乙烯分解的转换效率为100,000，丙分解的转换值为200,000）和出色的α-烯烃选择性（高达99％）。一项计算研究表明，在磷化氢-铜助催化剂存在下，β-氢化物消除途径的能垒比在不存在助催化剂的情况下要高，这可能有助于提高钌催化剂在反应中的寿命。