Recent Advances in Radical‐Mediated C—C Bond Fragmentation of Non‐Strained Molecules.

The carbon‐carbon (C—C) σ‐bonds construct the fundamental frameworks of organic molecules. The direct functionalization of C—C bonds represents one of the most efficient and step‐economical transformations in synthetic chemistry. The past few decades have witnessed the fast development of transition‐metal mediated C—C bond activation. In contrast, the radical‐promoted C—C bond cleavage has received relatively less attention. As the occurrence of ring strain significantly facilitates the fission of cyclic C—C bonds via radical approaches, the strain relief‐driven C—C bond activation mostly relies on the three‐ and four‐membered rings. The C—C activation of non‐strained molecules such as medium‐ or large‐sized rings and linear alkanes remains challenging. In this review, we will focus on the recent advances in radical‐mediated C—C bond activation of non‐strained molecules. Herein, the alkoxy‐ and iminyl‐radical triggered scission of non‐strained C—C bonds and C—C cleavage via the strategy of remote functional group migration is summarized. The recent advances in radical‐mediated C—C bond activation of non‐strained molecules are summarized in this review. These transformations are mainly accomplished during the past three years, thus representing an emerging topic in organic chemistry. The alkoxy‐ and iminyl‐radical triggered cleavage of non‐strained C—C bonds and the C—C activation via the strategy of remote functional group migration are discussed in details. [ABSTRACT FROM AUTHOR]