Photoinduced B–H Arylation of N‑Heterocyclic Carbene Boranes with Sulfonyl(hetero)arenes

Arylborane complexes ligated by N-heterocyclic carbenes
(NHCs)
can be synthesized by photoirradiation of a mixture of NHC-boranes
and sulfonyl(hetero)arenes. The reaction occurs under mild and convenient
conditions without any photocatalyst, which are realized by a radical
chain mechanism involving NHC-boryl radicals and sulfonyl radicals.
This reaction offered the opportunity to reveal the photophysical
property of a 2-borylnaphtho[1,2-d]thiazole derivative.