Acyl radicals have been generated from α-keto acids using inexpensive and commercially available 2-chloro-thioxanthen-9-one as the photoredox catalyst under visible light illumination. These reactive species added to olefins or coupled with aryl halides via a bipyridyl-stabilized Ni(II) catalyst, enabling easy access to a diverse range of ketones. This reliable, atom-economical, and eco-friendly protocol is compatible with a wide range of functional groups.

中文翻译：

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使用羰基光催化剂从α-酮酸制得的酰基自由基：光氧化还原催化的酮合成。

在可见光照射下，使用廉价且可商购的2-氯-噻吨酮-9-作为光氧化还原催化剂，已由α-酮酸生成了酰基基团。这些反应性物质通过联吡啶基稳定的Ni（II）催化剂添加到烯烃中或与芳基卤化物偶合，可轻松获得各种酮。这种可靠，原子经济且环保的协议可与多种官能团兼容。