Photochemistry of Benzotriazoles: Generation of 1,3-Diradicals and Intermolecular Cycloaddition as a New Route toward Indoles and Dihydropyrrolo[3,4-b]Indoles
作者:Nader Al-Jalal、Maher Ibrahim、Nouria Al-Awadi、Mohamed Elnagdi、Yehia Ibrahim
DOI:10.3390/molecules191220695
日期:——
Irradiation of benzotriazoles 1a–e at λ = 254 nm in acetonitrile solution generated the corresponding 1,3-diradicals which underwent intermolecular cycloaddition with maleimides to afford the corresponding dihydropyrrolo[3,4-b]indoles and with acetylene derivatives to afford indoles as the major products. This offers an interesting and simple access to such ring systems of potential synthetic and biological
在乙腈溶液中以 λ = 254 nm 照射苯并三唑 1a-e 产生相应的 1,3-双自由基,它们与马来酰亚胺进行分子间环加成反应,得到相应的二氢吡咯并 [3,4-b] 吲哚,并用乙炔衍生物得到吲哚作为主要产品。这提供了对具有潜在合成和生物学意义的此类环系统的有趣且简单的访问。光产物的结构是通过光谱和单晶 X 射线晶体学确定的。