Use of the Wilkinson Catalyst for the<i>ortho</i>-CH Heteroarylation of Aromatic Amines: Facile Access to Highly Extended π-Conjugated Heteroacenes for Organic Semiconductors
作者:Yumin Huang、Di Wu、Jingsheng Huang、Qiang Guo、Juan Li、Jingsong You
DOI:10.1002/anie.201406445
日期:2014.11.3
An unprecedented catalytic system composed of the Wilkinson catalyst [Rh(PPh3)3Cl] and CF3COOH enabled the highly regioselective cross‐coupling of aromatic amines with a variety of heteroarenes through dual CH bond cleavage. This protocol provided a facile and rapid route from readily available substrates to (2‐aminophenyl)heteroaryl compounds, which may be conveniently transformed into highly extended
由Wilkinson催化剂[Rh(PPh 3)3 Cl]和CF 3 COOH组成的空前催化体系,通过双CH键断裂,使芳香族胺与多种杂芳烃发生了高度区域选择性的交叉偶联。该协议提供了从容易获得的底物到(2-氨基苯基)杂芳基化合物的便捷途径,可以方便地将其转化为高度扩展的π共轭杂并苯。实验研究和计算表明,噻吩并[3,2-b]吲哚具有较大的HOMO-LUMO能隙和较低的HOMO能级,因此可能是高性能的有机半导体。本文中,我们首次报道了将铑(I)催化剂用于氧化CH / CH偶联反应。当前的创新催化剂系统比[RhCp * Cl 2 ] 2 / AgSbF 6便宜得多,并且可以为将该方法应用于其他类型的CH活化过程打开大门。