Carbon radicals redox-mediated method

The redox-mediated method is another way to generate carbon radicals. One-electron oxidation of neutral organic compounds having a carbon-heteroatom bond produces radical cation intermediates that decompose to give carbon radicals (Scheme 5.9a). Carbon radicals can also be generated by one-electron reduction followed by bond cleavage... 

Carbocations, carbon radicals, and carbanions are important reactive carbon intermediates in organic chemistry and their interconversions could be effected, in principle, by redox processes. With the cation pool method at hand, we next examined the redox-mediated interconversions of such reactive carbon species. 

In view of the extensive and fruitful results described above, redox reactions of small ring compounds provide a variety of versatile synthetic methods. In particular, transition metal-induced redox reactions play an important role in this area. Transition metal intermediates such as metallacycles, carbene complexes, 71-allyl complexes, transition metal enolates are involved, allowing further transformations, for example, insertion of olefins and carbon monoxide. Two-electron- and one-electron-mediated transformations are complementary to each other although the latter radical reactions have been less thoroughly investigated. 

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