A photo-promoted oxidative cyclization, that is, Mallory reaction of 2,3-diarylbenzophopholes has been developed. With an assistance of Bi(OTf)3 Lewis acid, the reaction proceeds smoothly under visible light irradiation even without any external oxidants. The newly developed dehydrogenative conditions are compatible with various functional groups and substitution patterns, which enables the streamlined syntheis of highly condensed dibenzophosphole derivatives of potent interest in material chemistry. Moreover, experimental and computational studies unveil the detailed reaction mechanism. The preliminary optoelectronic properties of some newly synthesized compounds are also demonstrated.

中文翻译：

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可见光照射下 Lewis 酸辅助脱氢 Mallory 反应合成高度浓缩的磷酸孔


已经开发了一种光促进的氧化环化，即 2,3-二芳基苯并拓扑孔的 Mallory 反应。在 Bi（OTf）3 路易斯酸的帮助下，即使没有任何外部氧化剂，反应在可见光照射下也能顺利进行。新开发的脱氢条件与各种官能团和取代模式兼容，这使得高度浓缩的二苯并膦衍生物的简化合成成为可能，这在材料化学中具有重要意义。此外，实验和计算研究揭示了详细的反应机理。还证明了一些新合成化合物的初步光电特性。