Eosin Y-catalyzed one-pot coupling and cyclization of o-substituted anilines with aldehydes to form benzoxazoles and benzothiazoles under mild condition has been developed. The reaction scope was broadly tolerant of various 2-substituted anilines and aldehydes. The desired products were obtained in high yields with the use of eosin Y as a photocatalyst under a substantial refinement of reaction conditions in comparison with previous literature. Based on the experimental results observed, a plausible mechanism involving a radical process has been proposed.

中文翻译：

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通过2-取代的苯胺与醛的光催化自由基环化直接合成苯并恶唑和苯并噻唑

曙红Y催化一锅耦合和邻位取代苯胺与醛环化在温和条件下形成苯并恶唑和苯并噻唑。反应范围广泛耐受各种2-取代的苯胺和醛。与以前的文献相比，在显着改善反应条件的条件下，使用曙红Y作为光催化剂可以高收率获得所需产物。基于观察到的实验结果，提出了一种涉及自由基过程的合理机制。