Affiliation:
1. Key Laboratory of Precision and Intelligent Chemistry iChEM CAS Key Laboratory of Urban Pollutant Conversion Anhui Province Key Laboratory of Biomass Clean Energy University of Science and Technology of China 230026 Hefei China
Abstract
AbstractDivergent synthesis of fluorine‐containing scaffolds starting from a suite of raw materials is an intriguing topic. Herein, we report the solvent‐controlled rhodium‐catalyzed tunable arylation of 1‐bromo‐2,2‐difluoroethylene. The selection of the reaction solvents provides switchable defluorinated or debrominated arylation from readily available feedstock resources (both arylboronic acids/esters and 1‐bromo‐2,2‐difluoroethylene are commercially available). This switch is feasible because of the difference in coordination ability between the solvent (CH2Cl2 or CH3CN) and the rhodium center, resulting in different olefin insertion. This protocol allows the convenient synthesis of monofluoroalkenes and gem‐difluoroalkenes, both of which are important scaffolds in the fields of medicine and materials. Moreover, this newly developed solvent‐regulated reaction system can be applied to the site‐selective dechlorinated arylation of trichloroethylene. Overall, this study provides a useful strategy for the divergent synthesis of fluorine‐containing scaffolds and provides insight into the importance of solvent selection in catalytic reactions.
Funder
National Natural Science Foundation of China
Fundamental Research Funds for Central Universities of the Central South University