Rhodium(III)‐Catalyzed Annulation of Arenes with Alkynes Assisted by an Internal Oxidizing N—O Bond.

Rh(III)-catalyzed C–H activation of 3-aryl-dihydroisoxazoles in the coupling with diarylacetylenes has been developed under redox-neutral conditions. This reaction occurred under mild conditions with no by-product, and the N–O bond functions as an oxidizing directing group, leading to efficient synthesis of isoquinolines functionalized with a proximal secondary alcohol.