A visible-light-catalyzed synthesis of 6-aryl substituted phenanthridines from aryl bromides and 2-isocyanobiphenyls at room temperature has been discovered. This metal-free cross-coupling reaction offers rapid and sustainable access to a series of structurally complex and diverse phenanthridines. The usage of inexpensive Rhodamine 6G as the catalyst with easy operation makes this protocol very practical.

中文翻译：

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芳基（杂芳基）溴化物与异腈的无金属光催化交叉偶联

已发现在室温下可见光催化由芳基溴化物和2-异氰基联苯合成6-芳基取代的菲啶。这种无金属的交叉偶联反应使人们能够快速，可持续地获得一系列结构复杂且多样化的菲啶。使用廉价的若丹明6G作为易于操作的催化剂使该方案非常实用。