A convenient, efficient, and metal-free synthesis of 6-thiocyanatophenanthridines by visible-light- and air-mediated, eosin Y-catalyzed, sequential radical cyclization and aromatization of 2-isocyanobiphenyls with ammonium thiocyanate is reported. Advantageously, the protocol utilizes inexpensive, clean, and sustainable natural resources such as visible light and atmospheric oxygen at room temperature in a one-pot procedure.

中文翻译：

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通过可见光和空气促进的 2-异氰基联苯自由基硫氰化反应合成 6-硫氰基菲啶

据报道，通过可见光和空气介导、伊红 Y 催化、2-异氰基联苯与硫氰酸铵的连续自由基环化和芳构化，方便、高效且无金属地合成 6-硫氰酸根合菲啶。有利的是，该协议在一锅程序中利用了廉价、清洁和可持续的自然资源，例如室温下的可见光和大气氧。