Diaryliodonium Salts in Transition‐Metal‐Catalyzed Chelation‐Induced C(sp 2 /sp 3 )−H Arylations

Transition‐metal‐catalyzed Cross‐coupling via directing group assisted C−H bond activation has become an expedient tool in current synthesis to achieve diverse molecular complexity. In this context, chelation‐assisted arylations of C(sp 2 /sp 3 )−H bonds have been extensively investigated as aryl/biaryl derivatives are an important contributor in the area of the industry, farming, medicinal and material science. The diaryliodonium salt has been broadly utilized in C(sp 2 /sp 3 )−H bond arylation where the reaction proceeds via oxidative addition of aryliodonium salt to chelation induced metallacycle. The proximal/remote C(sp 2 /sp 3 )−H bonds in coordination with transition metals are arylated by a range of directing groups in good to excellent yields. In this mini‐review, we have outlined the up to date developments on transition‐metal‐catalyzed chelation assisted C(sp 2 /sp 3 )−H bond arylation utilizing diaryliodonium salts as the coupling partner.