A photosensitizer [Ru(bpy)3]2+ catalyzes oxidative coupling reaction of enamines with silyl enol ethers under visible light irradiation by a Xe lamp or sunlight to produce γ-diketones. A 2e-oxidation process involved in this reaction is achieved by a combination of the photoexcited [Ru(bpy)3]2+ species and duroquinone, a 2e-acceptor.
![Graphical abstract: Sunlight-driven synthesis of γ-diketones via oxidative coupling of enamines with silyl enol ethers catalyzed by [Ru(bpy)3]2+](http://hg.y866.cn/compound/lib/scimg/usr/1/C2CC31748F.jpg)
