We describe a photocatalytic system that reveals latent photooxidant behavior from one of the most reducing conventional photoredox catalysts, N-phenylphenothiazine (PTH). This aerobic photochemical reaction engages difficult to oxidize feedstocks, such as benzene, in C(sp2)–N coupling reactions through direct oxidation. Mechanistic studies are consistent with activation of PTH via photooxidation and that Lewis acid co-catalysts scavenge inhibitors formed upon catalyst activation.

中文翻译：

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揭示光催化还原剂的强光氧化行为

我们描述了一种光催化系统，该系统可从最还原性最强的传统光氧化还原催化剂之一N-苯基吩噻嗪（PTH）中揭示潜在的光氧化行为。这种有氧光化学反应通过直接氧化在C（sp2）–N偶联反应中参与了难以氧化的原料，例如苯。机理研究与通过光氧化活化PTH以及路易斯酸助催化剂清除催化剂活化后形成的抑制剂是一致的。