Synthesis of 3,4‐pyrroline derivatives via visible‐light‐induced hydro/oxyimination of unactivated olefins is reported. In the presence of the photoredox catalyst fac‐Ir(ppy)₃, the key iminyl radical intermediate can be readily generated from O‐acyl oximes, and undergoes intramolecular cyclization and H‐abstraction from solvent or is trapped by TEMPO to give the corresponding hydro/oxyimination product, respectively. Mechanistic investigations indicate that N,N′‐dimethylpropylene urea (DMPU) works as both reducing agent for catalyst regeneration and H‐donor for product formation in this process.

中文翻译：

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以N，N'-二甲基丙烯脲为H-供体的可见光促进未活化烯烃的加氢氢化合成吡咯啉

据报道，通过可见光诱导的未活化烯烃的加氢/氧合反应合成了3,4-吡咯啉衍生物。在存在光氧化还原催化剂fac- Ir（ppy）_{3的情况下}，关键的亚胺基自由基中间体很容易从O-酰基肟中生成，并经历分子内环化和溶剂中H的吸收或被TEMPO捕集，得到相应的加氢化合物。 /氧合产物。机理研究表明，在此过程中，N，N'-二甲基丙烯脲（DMPU）既可作为催化剂再生的还原剂，又可作为产物形成的H-供体。