The first radical cation salt (RCS) was prepared more than 100 years ago, and with the recent renaissance of radical chemistry, the RCS promoted organic transformations attrack extensively attention. In early research, RCS was mainly used to initiate single electron oxidation reactions, such as cycloaddition, fragmentation, rearrangement and so on. Recently, RCS was used to induce the aerobic oxidation of C-H bond, and achieved a series of direct functionalization of C-H bond. In this review,

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... ominent examples from the recent literatures are organized on the basis of the different reactions enabled by RCS catalysis.