Reductive Allylation of Carbon Dioxide Catalyzed by Newly Designed PSiP-Pincer Type Palladium Hydride Complex

摘要

Carboxylation of carbon nucleophiles under atmospheric pressure of carbon dioxide as an electrophile is highly valuable as a straightforward method for the synthesis of carboxylic acids. Development of its catalytic version through catalytic generation of nucleophilic organometallic species from easily available unsaturated hydrocarbons would be highly desirable from the standpoint of the atom economical synthetic methodology, however, such catalysis is mostly limited to that based on Ni(0)-promoted oxidative cyclization of rather specific unsaturated hydrocarbons. Herein we report a new approach to the catalytic, nucleophilic CO,-fixation reaction through the catalytic generation of nucleophilic ally] palladium species via hydropalladation of allenes, followed by its nucleophilic addition to CO2.