Preparation of CO2 species with electrophilic reactivity and fixation into unsaturated carbon-carbon bonds

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As CO2 is an abundant, inexpensive, and renewable carbon source, the development of a method for its synthetic use is one of the most important subjects in green sustainable chemistry. Recently, we have found that CO2 can be activated by the combined use of AlX3 and R3SiX. By examining this phenomenon and extending its principles, we have succeeded in the activation of CO2 with R3SiB(C6F5)4 and its applications to the carboxylation of aromatic compounds and the hydrocarboxylation of olefins.