Metal-Free, Redox-Neutral, Site-Selective Access to Heteroarylamine via Direct Radical–Radical Cross-Coupling Powered by Visible Light Photocatalysis
作者:Chao Zhou、Tao Lei、Xiang-Zhu Wei、Chen Ye、Zan Liu、Bin Chen、Chen-Ho Tung、Li-Zhu Wu
DOI:10.1021/jacs.0c07600
日期:2020.9.30
common structure found in drug agents, natural products and fine chemicals. Reported herein is an alternative access to heteroarylamine via radical-radical cross-coupling pathway, powered by visible light catalysis without any aid of external oxidant and reductant. Only by visible light irradiation of a photocatalyst such as a metal-free photocatalyst, a cascade single electron transfer event of amines
过渡金属催化的 CN 键形成反应已成为构建芳胺的基本和强大工具,芳胺是药物、天然产物和精细化学品中的常见结构。本文报道了一种通过自由基-自由基交叉偶联途径获得杂芳胺的替代途径,由可见光催化提供动力,无需任何外部氧化剂和还原剂的帮助。只有通过光催化剂(如无金属光催化剂)的可见光照射,胺和杂芳基腈的级联单电子转移事件,通过稳态和瞬态光谱研究证明,在原位产生胺自由基阳离子和芳基阴离子CN 键的形成。一系列可用胺的 CN 交叉偶联的无金属和氧化还原经济性质、高效率和位点选择性,