General and highly efficient fluorinated-N-heterocyclic carbene–based catalysts for the palladium-catalyzed Suzuki–Miyaura reaction
作者:Taoping Liu、Xiaoming Zhao、Qilong Shen、Long Lu
DOI:10.1016/j.tet.2012.05.068
日期:2012.8
acid with aryl halides and heteroaryl halides, but also efficient for coupling of other heteroaryl halides and heteroaryl boronic acids. Finally, the catalyst is highly effective for Suzuki–Miyaura reaction of aryl bromides and chlorides with 0.01–0.1 mol % loading if the temperature was raised at refluxed THF/H2O.
据报道,一种通用且高效的三氟甲基化-N-杂环卡宾(NHC)基催化剂可用于钯催化的Suzuki-Miyaura反应。在催化剂的存在下,未活化的芳基氯和三氟甲磺酸与芳基硼酸的反应在室温下发生,收率好至极好(63-98%)。此外,由Pd(OAc)2 /咪唑鎓盐6a的组合产生的催化剂不仅对于杂芳基硼酸与芳基卤化物和杂芳基卤化物的偶联有效,而且对其他杂芳基卤化物和杂芳基硼酸的偶联有效。最后,如果温度在回流的THF / H 2 O上升高,则该催化剂对于0.01-0.1 mol%负载量的芳基溴化物和氯化物的Suzuki-Miyaura反应非常有效。