A new protocol for the decarboxylative Heck vinylation of benzoic acids is disclosed. In the presence of a catalyst system generated in situ from Pd(OAc)2 (2 mol %), CuF2 (2 equiv), and benzoquinone (0.5 equiv) in NMP, a wide range of olefins were coupled with various 2-nitrobenzoates at 130 °C with the release of carbon dioxide to afford the corresponding vinyl arenes in good yields.
揭示了一种新的对苯甲酸脱羧Heck乙烯化的协议。在NMP中,通过Pd(OAc)2(2 mol%)、CuF2(2当量)和苯醌(0.5当量)原位生成的催化剂体系的存在下,在130°C下,一系列烯烃与各种2-硝基苯甲酸酯偶联,释放二氧化碳,得到相应的乙烯芳烃产率较高。