title: Carbon-Centered Radical Addition to C=X Bonds for C-X Bond Formation.
abstract: Among various kinds of radical reactions, the addition of carbon-centered radicals to unsaturated bonds represents a powerful tool for the construction of different C-C and C-X (X = N, O, S, etc.) bonds, in which typically applied unsaturated bonds include alkenes, alkynes, imines, carbonyls, and even thiocarbonyls. When C=X bonds are utilized as the radical acceptors, reactions usually occur at the carbon position to generate a heteroatom radical, during which C-C coupling products are formed. This reaction mode has dominated this field for several decades. However, there is also another unconventional type of radical addition mode, in which carbon-centered radicals attack the heteroatom position of C=X bonds to generate carbon radicals, during which selective C-X bond formation is achieved. This reaction mode demonstrates an effective method for the construction of different C-X bonds, such as C-O, C-N, and C-S bonds. This Focus Review gives an overview of recent advances in this unconventional field.
authors.affiliation: College of Chemistry and Molecular Sciences, the Institute for Advanced Studies (IAS), Wuhan University, Wuhan, Hubei, 430072, P.R. China.
authors.forename: Dong
authors.initials: D
authors.lastname: Liu
authors.affiliation: College of Chemistry and Molecular Sciences, the Institute for Advanced Studies (IAS), Wuhan University, Wuhan, Hubei, 430072, P.R. China.
authors.forename: Chao
authors.initials: C
authors.lastname: Liu
authors.affiliation: College of Chemistry and Molecular Sciences, the Institute for Advanced Studies (IAS), Wuhan University, Wuhan, Hubei, 430072, P.R. China. aiwenlei@whu.edu.cn.|National Research Center for Carbohydrate Synthesis, Jiangxi Normal University, Nanchang, Jiangxi, 330022, P.R. China. aiwenlei@whu.edu.cn.
authors.forename: Aiwen
authors.initials: A
authors.lastname: Lei
keywords: C−X bond formation; addition reactions; cyclization; imines; radicals