Abstract
The catalytic transformation of inert C-H bonds to other functional groups is one of the most active research areas in organic and organometallic chemistry because such reactions present possibilities to exploit readily available starting materials, shorten reaction sequences, and synthesize compounds that are otherwise difficult to prepare. In this review, recent advances in the catalytic functionalization of unactivated sp3 C-H bonds are briefly introduced. The sp3 C-H bonds were transformed to C-C and C-O bonds through activation with transition metal catalysts assisted by chelation of directing groups or a cyclometalation process.
