Palladium, iridium and ruthenium complexes with acyclic imino-N-heterocyclic carbenes and their application in aqua-phase Suzuki–Miyaura cross-coupling reaction and transfer hydrogenation
作者:Xu-Qing Guo、Ya-Nong Wang、Dong Wang、Li-Hua Cai、Zhen-Xia Chen、Xiu-Feng Hou
DOI:10.1039/c2dt31989f
日期:——
coordination of the carbene carbon and the imino nitrogen atom, and the latter two are cationic compounds with Cl− and NTf2− as counteranion respectively. The catalytic performance of Pd complexes for Suzuki–Miyaura cross-coupling reactions in pure water and Ir and Ru complexes for transfer hydrogenation of ketones and imines was tested in a wide scope of substrates. Pd complex 4b with the largest
钯(4a–4c),铱(5a–5c)和钌(6a–6c)络合物是通过无环亚氨基官能化的咪唑鎓氯化物[1-(Me)-咪唑鎓-3]的相应银络合物的原位金属转移制备的-C(p -CH 3 –Ph)N(Ar)}] Cl(3)(Ar = 2,4,6-三甲基苯基(3a),2,6-二异丙基苯基(3b)和苯基(3c)) [Pd(COD)Cl 2 ],[Cp * IrCl 2 ] 2或[Ru(p- Cymene)Cl 2 ] 2, 分别。铱和钌配合物5a [PF 6 6] -5c [PF 6 6],6a [PF 6 6] -6c [PF 6 6],6c [BF 4 4],6c [BPh 4 4]和6c [NTf 2 22] ,直接得到从图5A-5C和6A-6C通过阴离子交换过程与KPF 6,的NaBF 4,NaBPh 4和LiNTf 2分别(双(三氟甲基磺酰)酰亚胺锂),。所有复合物的特征在于FT-IR,1 H和13