Aryldiazenyl Radicals from Arylazo Sulfones: Visible Light‐Driven Diazenylation of Enol Silyl Ethers
作者:Havall Othman Abdulla、Simone Scaringi、Ahmed A. Amin、Mariella Mella、Stefano Protti、Maurizio Fagnoni
DOI:10.1002/adsc.201901424
日期:2020.5.26
A versatile protocol for the diazenylation of enolsilylethers under visible light irradiation is presented herein. The reaction is based on the underused reaction of a nitrogen‐based radical (the diazenyl radical) with an enolsilylether. Arylazo sulfones were used as photoactivatable precursors of these diazenyl radicals. The resulting azaderivatives are potentially bioactive compounds as well
An efficient protocol for diazenylation of 1,3-diones under photoredox conditions is presented herein. C–N bond forming Csp3–H functionalization of cyclic and alkyl diones by unstable aryl diazenyl radicals is achieved through reaction with aryldiazonium tetrafluoroborates by organocatalysts under visible light irradiation. The reaction has wide substrate scope, gives excellent yields, and is also
本文提出了在光氧化还原条件下 1,3-二酮二氮烯基化的有效方案。在有机催化剂的可见光照射下,不稳定的芳基二氮烯基自由基与芳基重氮四氟硼酸盐反应,实现了环二酮和烷基二酮的 C-N 键形成 C sp 3 -H 官能化。该反应底物范围广,产率优异,并且在水作为绿色溶剂中也很有效。该方法提供了一种容易获得芳基二氮烯基衍生物的方法,芳基二氮烯基衍生物是合成氮杂杂环以及潜在药效团的有用关键起始材料。