A visible light‐induced (blue LED) radical cascade has been devised to effect selenylative spirocyclization of N‐aryl alkynamides at room temperature under oxygen atmosphere and without the aid of external photocatalyst. The protocol is operationally simple, scalable, and offers clean synthesis of 3‐selenospiro[4,5]trienones in high yields (up to 92%). A novel spiro‐ring‐opening strategy has also been accomplished to access fully substituted acryl amides.

中文翻译：

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可见光诱导的合成方法，以分子氧为氧化剂，对N-芳基烷基酰胺进行烯丙基螺旋环化

已经设计了可见光诱导的（蓝色LED）自由基级联反应，可在室温下在氧气气氛下且无需外部光催化剂的情况下实现N-芳基炔酰胺的硒化螺环化。该协议操作简单，可扩展，并且可以高收率（高达92％）提供3-硒代螺螺[4,5]三烯酮的干净合成。为了获得完全取代的丙烯酰胺，还完成了一种新颖的开环策略。