Redox reactions organic photoredox catalyst

Before 2008, a limited number of works about photoredox catalysis by [Ru(bpy)3] had been reported in the field of synthetic organic chemistry [4—17]. After publication of the undermentioned seminal works during 2008-2010, however, a great number of reports on redox reactions by photoredox catalysis have appeared [18-29]. In this section, we will concisely review redox reactions by photoredox catalysts around 2008. 

Abstract Photoredox catalysis by well-known nithenium(II) polypyridine complexes is a versatile tool for redox reactions in synthetic organic chemistry, because they can effectively catalyze single-electron-transfer (SET) processes by irradiation with visible light. These favorable properties of the catalysts provide a new strategy for efficient and selective radical reactions. Salts of tris(2,2 -bipyridine)mthenium (II), [Ru(bpy)3], were first reported in 1936. Since then, anumber of works related to artificial photosynthesis and photofunctional materials have been reported, but only limited efforts had been devoted to synthetic organic chemistry. Remarkably, since 2008, this photocatalytic system has gained importance in redox reactions. In this chapter, we will present a concise review of seminal works on ruthenium photoredox catalysis around 2008, which will be followed by our recent research topics on trifluoromethylation of alkenes by photoredox catalysis. 

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