A simple and practical approach has been established for the synthesis of 6-benzylphenanthridines from benzylic hydrocarbons and 2-isocyanobiphenyls via C(sp³)–H/C(sp²)–H bond functionalization under metal-free condition. The reaction exhibits good functional group tolerance and delivers the target products in moderate to excellent yields. The preliminary mechanistic investigation revealed that a radical intermediate might be involved in this reaction.

中文翻译：

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通过2-异氰基联苯的自由基加成/环合反应实现无金属合成6-苄基菲啶

建立了一种简单实用的方法，可在无金属条件下通过C（sp ³）–H / C（sp ²）–H键官能化从苄基烃和2-异氰基联苯合成6-苄基菲啶。该反应表现出良好的官能团耐受性，并以中等至优异的产率提供目标产物。初步的机理研究表明，该反应可能涉及自由基中间体。