Reaction Mechanism of Pd‐Catalyzed “CO‐Free” Carbonylation Reaction Uncovered by In Situ Spectroscopy: The Formyl Mechanism
作者:Robert Geitner、Andrei Gurinov、Tianbai Huang、Stephan Kupfer、Stefanie Gräfe、Bert M. Weckhuysen
DOI:10.1002/anie.202011152
日期:2021.2.15
“CO‐free” carbonylation reactions, where synthesis gas (CO/H2) is substituted by C1 surrogate molecules like formaldehyde or formic acid, have received widespread attention in homogeneous catalysis lately. Although a broad range of organics is available via this method, still relatively little is known about the precise reactionmechanism. In this work, we used in situ nuclear magnetic resonance (NMR)
“无CO”羰基化反应,其中合成气(CO / H 2)被甲醛或甲酸等C1替代分子取代,最近在均相催化中受到广泛关注。尽管可以通过这种方法获得各种各样的有机物,但是对于精确的反应机理知之甚少。在这项工作中,我们使用原位核磁共振(NMR)光谱来阐明使用不同替代分子的烯烃烷氧基羰基化的机理。与先前的假设相反,在反应过程中未发现一氧化碳。相反,反应是通过原位生成的甲酸甲酯的CH活化进行的。在定量NMR实验的基础上,建立了包含所有主要中间体的动力学模型,从而使知识驱动的反应最优化。最后,