Copper‐Catalyzed Tandem Cyclization Approach to N,O‐Chelated Boron Difluoride Complexes

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A strategy for synthesizing N,O‐chelated boron difluoride complexes via copper‐catalyzed tandem cyclization of readily available 2‐aryl pyridines has been developed. This reaction tolerates a wide range of functional groups, providing the corresponding products in 43–91% yield. Furthermore, the photophysical properties were investigated by measuring the UV/Vis absorption and fluorescence spectra of several product derivatives.