Triazene as the Directing Group Achieving Highly <i>Ortho</i>-Selective Diborylation and Sequential Functionalization
作者:Shuai Mao、Bo Yuan、Xinyu Wang、Yahao Zhao、Lu Wang、Xue-Yan Yang、Yi-Ming Chen、San-Qi Zhang、Pengfei Li
DOI:10.1021/acs.orglett.2c00994
日期:2022.5.27
This study describes a regioselective ortho,ortho′-diborylation of aromatic triazenes catalyzed by [Ir(OMe)(cod)]2 in near-quantitative yields without an additional ligand. Aromatic triazenes act as both substrates and ligands. The X-ray structures of 2a and 2p indicate that the monoborylation products could promote the occurrence of diborylation. The synthesized triazene-substituted diboronate esters
本研究描述了由 [Ir(OMe)(cod)] 2催化的芳香族三氮烯的区域选择性邻位、邻位'-二硼化反应,在没有额外配体的情况下以接近定量的收率。芳香族三氮烯既是底物又是配体。2a和2p的X射线结构表明单硼化产物可以促进二硼化的发生。合成的三氮烯取代的二硼酸酯可以进行多种转化,包括去除定向基团。一锅顺序修饰为密集功能化的芳烃提供了一个简短的入口。