Nitrile or cyano compounds are important part of structural motifs in dyes, agrochemicals, medicinal compounds and electronic materials. Also, aryl nitrile is an important intermediate in preparation of various compounds...

Biaryl compounds are extremely important structural motifs in natural products, biologically active components and pharmaceuticals. Selective synthesis of biaryls by distinguishing the subtle reactivity difference of distal arene C−H bonds are significantly challenging. Herein, we describe para‐selective C−H arylation, which is acheived by a unique combination of a meta‐directing group and norbornene as a transient mediator. Upon direct meta‐C−H palladation, one‐bond relay palladation occurs in presence of norbornene and subsequently para‐C−H arylation is achieved for sulfonates, phosphonates and phenols bearing 2,6‐disubstitution patterns. The protocol is amenable to electron‐deficient aryl iodides. Multisubstituted arenes and phenols are obtained by postsynthetic modification of the products. The protocol allows the synthesis of hexa‐substituted benzene by sequential selective distal C−H functionalization.

Carbon dioxide (CO2) has emerged as one of the exciting cost-effective, abundant, and ready-to-use C1 sources in synthetic organic chemistry. However, the thermodynamic stability, as well as the kinetic inertness,...

Biaryl compounds are extremely important structural motifs in natural products, biologically active components and pharmaceuticals. Selective synthesis of biaryls by distinguishing the subtle reactivity difference of distal arene C−H bonds are significantly challenging. Herein, we describe para‐selective C−H arylation, which is acheived by a unique combination of a meta‐directing group and norbornene as a transient mediator. Upon direct meta‐C−H palladation, one‐bond relay palladation occurs in presence of norbornene and subsequently para‐C−H arylation is achieved for sulfonates, phosphonates and phenols bearing 2,6‐disubstitution patterns. The protocol is amenable to electron‐deficient aryl iodides. Multisubstituted arenes and phenols are obtained by postsynthetic modification of the products. The protocol allows the synthesis of hexa‐substituted benzene by sequential selective distal C−H functionalization.