Bis(NHC)-Pd-catalyzed one-pot competitive C–C*C–C, C–C*C–O, C–C*C–N, and C–O*C–N cross-coupling reactions on an aryl di-halide catalyzed by a homogenous basic ionic liquid (TAIm[OH]) under base-free, ligand-free, and solvent-free conditions
作者:Yanfang Zhu、Guiyang Xu、Milad Kazemnejadi
DOI:10.1039/d1nj00067e
日期:——
competitive kinetics of C–C cross-coupling reactions (Heck, Suzuki, and Sonogashira) with C–N and C–O cross-coupling reactions, and also differences in the kinetics of aryl halides, the coupling reactions could be selectively performed with a low amount of by-products. The competitive cross-coupling reactions were thus performed with high selectivity under mild reaction conditions.
双(NHC)-Pd催化的有竞争力的不对称C-C * C-C,C-C * C-O,C-C * C-N,和O-C * C-N交联偶合反应进行经由所述一种新的离子液体存在下的一锅策略,它同时扮演溶剂、碱和配体的角色。基于甲基咪唑鎓部分与羟基抗衡阴离子制备离子液体,通过1,3,5-三嗪骨架(TAIm[OH])上的霍夫曼消除。Pd 离子可以通过离子液体中的双 (NHC)-配体部分有效地配位。基于 C-C 交叉偶联反应(Heck、Suzuki 和 Sonogashira)与 C-N 和 C-O 交叉偶联反应的竞争动力学差异,以及芳基卤化物的动力学差异,偶联反应可以以少量副产物选择性地进行。因此,竞争性交叉偶联反应在温和的反应条件下以高选择性进行。