Abstract
Here, by using eosin Y as a preferable catalyst, we present a photothermally induced decarbonylative aryl CH arylation with the aldehydes. This transformation proceeds with operational simplicity and solvent-free conditions, does not need for 1,2-dinitrobenzene additive, and tolerates unsuccessful functionalities (e.g., 4-pyridine, NO2 and SO2Me) in previously reported protocols. In addition to the aryl aldehydes, the alkyl ones are also compatible with this transformation. Mechanistic investigations reveal that the reaction undergoes aldehyde decarbonylation to afford aryl radicals in situ, its regioselective addition to the arenes followed by single electron oxidation and homolytic hydrogen abstraction gives rise to the desired cross-coupling products. Give the striking features, this work offers a useful platform to directly access various biaryls.
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