Chinese Chemical Letters ( IF 9.4 ) Pub Date : 2021-08-12 , DOI: 10.1016/j.cclet.2021.08.036 Zhiwei Wang 1 , Qishun Liu 1 , Ruisheng Liu 1 , Zhongyin Ji 1 , Yan Li 1 , Xiaohui Zhao 2 , Wei Wei 1
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A mild and efficient photochemical multi-component tandem reaction of quinoxalin-2(1H)-ones, alkenes and sulfinic acids is reported. This tandem reaction could be conveniently carried out at room temperature by employing 4CzIPN as the metal-free photocatalyst and dioxygen (air) as the environmentally benign oxidant. A number of sulfonated quinoxalin-2(1H)-ones were obtained in satisfactory yields with favorable functional group tolerance. Radical trapping experiment and fluorescence quenching experiments were performed to elucidate this visible-light mediated radical reaction process.
中文翻译：
可见光引发的 4CzIPN 催化多组分串联反应组装磺化 quinoxalin-2(1H)-ones
报道了一种温和高效的喹喔啉-2(1 H )-酮、烯烃和亚磺酸的光化学多组分串联反应。通过使用 4CzIPN 作为无金属光催化剂和双氧（空气）作为环境友好的氧化剂，这种串联反应可以在室温下方便地进行。以令人满意的收率获得了许多磺化的喹喔啉-2(1 H )-酮，具有良好的官能团耐受性。进行自由基捕获实验和荧光猝灭实验以阐明这种可见光介导的自由基反应过程。
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