Framework-Copper-Catalyzed C−N Cross-Coupling of Arylboronic Acids with Imidazole: Convenient and Ligand-Free Synthesis of N-Arylimidazoles
作者:Nainamalai Devarajan、Palaniswamy Suresh
DOI:10.1002/cctc.201600480
日期:2016.9.21
A convenient and environmentally benign synthesis of N‐arylimidazoles has been demonstrated by a straightforward reaction catalyzed by the unsaturated coordination sites of Cu in the copper terephthalate metal–organic framework (Cu(tpa)‐MOF). A series of N‐arylimidazoles has been synthesized in excellent yields by the C−N cross‐coupling reaction of arylboronic acids and imidazoles catalyzed by the
N-芳基咪唑的一种便捷且对环境无害的合成已通过对苯二甲酸铜金属-有机骨架(Cu(tpa)-MOF)中Cu的不饱和配位点催化的简单反应得到证明。通过使用乙醇作为良性溶剂,Cu(tpa)-MOF催化的芳基硼酸和咪唑的C-N交叉偶联反应,已以高收率合成了一系列N-芳基咪唑。本发明的不含配体的催化体系在温和条件下可平稳运行,避免使用化学计量比的Cu试剂,可耐受许多官能团,具有广泛的底物范围,并且可与其他氮杂环一起使用。异质性测试的结果证明了催化剂的稳定性和非均质性,并且该催化剂可以重复使用几次而不会损失活性。