Visible-Light Photoredox Catalysis: Dehalogenation of Vicinal Dibromo-, α-Halo-, and α,α-Dibromocarbonyl Compounds
作者:Tapan Maji、Ananta Karmakar、Oliver Reiser
DOI:10.1021/jo102239x
日期:2011.1.21
vic-Dibromo-, α-halo-, or α,α-dibromocarbonyl compounds can be efficiently dehalogenated using catalytic tris(2,2′-bipyridyl)ruthenium dichloride (Ru(bpy)3Cl2) in combination with 1,5-dimethoxynaphthalene (DMN) and ascorbate as sacrificial electron donor. For this process, a visible light promoted photocatalytic cycle is proposed that involves the reduction of carbon halogen bonds via free radical
使用催化三氯化三(2,2'-联吡啶基)钌(Ru(bpy)3 Cl 2)与1,5-结合可以有效地使vic -Dibromo-,α-卤代或α,α-二溴代羰基化合物脱卤二甲氧基萘(DMN)和抗坏血酸盐作为牺牲电子给体。对于该方法,提出了可见光促进的光催化循环,该循环涉及通过自由基中间体还原碳卤键。