Transition-metal-free regioselective C–H halogenation of imidazo[1,2-<i>a</i>]pyridines: sodium chlorite/bromite as the halogen source
作者:Junxuan Li、Jiayi Tang、Yuanheng Wu、Qiuxing He、Yue Yu
DOI:10.1039/c7ra12100h
日期:——
facile transition-metal-free regioselective halogenation of imidazo[1,2-a]pyridines using sodium chlorite/bromite as the halogen source is presented. The reaction has provided an efficient method for the formation of C–Cl or C–Br bonds to synthesize 3-chloro or 3-bromo-imidazo[1,2-a]pyridines which were then efficiently transformed into imidazo[1,2-a]pyridine core π-systems by Suzuki–Miyaura reactions
提出了一种使用亚氯酸钠/亚溴酸钠作为卤素源的咪唑并[1,2- a ]吡啶的简便的无过渡金属区域选择性卤化反应。该反应为形成C-Cl或C-Br键以合成3-氯或3-溴-咪唑并[1,2- a ]吡啶提供了一种有效的方法,然后将其有效转化为咪唑并[1,2- a ]吡啶核心π-系统通过铃木-宫浦反应。