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.

A palladium-catalyzed remote δ-CÀ H selenylation of arylethylamide derivatives with readily available diselenides has been reported. This protocol relies on the use of a removable picolinamide directing group to access unsymmetrical diaryl selenides in 45-98% yields. Furthermore, the inactivated δ-C(alkenyl)À H bond was also compatible in this reaction and afforded the thermo-dynamically unfavorable Z-selective-alkenyl selenides with complete control of site-and stereoselectivity.

A simple and efficient Brønsted-acid-promoted N-dealkylation of N-alkylamides and N-alkylsulfonamides has been developed. This strategy features an ample substrate scope with excellent chemical selectivity, affording primary (sulfon)amide derivatives in moderate to good yields without the need for transitionmetal catalysts.

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