Abstract
Reaction of the dimeric N-heterocyclic carbene (NHC) palladium compounds [Pd(μ-Cl)(Cl)(NHC)]2 with 4-phenyl-1H-1,2,3-triazole gave four mono- and dinuclear complexes 1–4. Mononuclear complexes 1 and 2 [(NHC)PdCl2(4-phenyl-1H-1,2,3-triazole)] were obtained when the reactions were performed in CH2Cl2, whereas dinuclear complexes 3 and 4 [Pd2(μ-Cl)(μ-4-phenyl-1H-1,2,3-triazole)Cl2(NHC)2] were obtained when the reactions were performed in THF in reflux with Et3N as the base. Further explorations of the catalytic properties of 1–4 for Pd-catalyzed transformations have been performed and these complexes exhibited moderate to high catalytic activities for Suzuki–Miyaura coupling and arylation of benzoxazoles with aryl bromides.
Acknowledgements
Financial supports from the National Natural Science Foundation of China (No. 21301061) and the National Science Foundation of Anhui Educational Bureau (No. KJ2016A881) are gratefully acknowledged.