Three new N-heterocyclic carbene (NHC)-Pd(II) complexes using 5-phenyloxazole as the ancillary ligand have been obtained in moderate to good yields by a one-pot reaction of the corresponding imidazolium salts, palladium chloride and 5-phenyloxazole under mild conditions. Initial studies showed that one of the complexes is an efficient catalyst for the Buchwald-Hartwig amination of aryl chlorides with various secondary and primary amines under the varied catalyst loading of 0.01-0.05 mol%, thus it will enrich the chemistry of NHCs and give an alternative catalyst for the coupling of challenging while cost-low aryl chlorides.

中文翻译：

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N-杂环卡宾-Pd（II）-5-苯基恶唑配合物的合成及其对芳基氯化物的布赫瓦尔德-哈特维格胺胺催化活性的初步研究

通过在相应的咪唑鎓盐，氯化钯和5-苯基恶唑的单锅反应下，以中等至良好的产率获得了三种以5-苯基恶唑为辅助配体的新的N-杂环卡宾（NHC）-Pd（II）配合物。温和的条件。初步研究表明，该配合物是在0.01-0.05 mol％的不同催化剂负载量下，用各种仲胺和伯胺对芳基氯化物进行Buchwald-Hartwig胺化反应的有效催化剂，因此它将丰富NHC的化学性质并得到用于偶合具有挑战性且成本较低的芳基氯化物的替代催化剂。