Photoinduced\nB–H Arylation of N‑Heterocyclic\nCarbene Boranes with Sulfonyl(hetero)arenes

Arylborane complexes ligated by N-heterocyclic carbenes\n(NHCs)\ncan be synthesized by photoirradiation of a mixture of NHC-boranes\nand sulfonyl(hetero)arenes. The reaction occurs under mild and convenient\nconditions without any photocatalyst, which are realized by a radical\nchain mechanism involving NHC-boryl radicals and sulfonyl radicals.\nThis reaction offered the opportunity to reveal the photophysical\nproperty of a 2-borylnaphtho[1,2-<i>d</i>]thiazole derivative.