1176334-01-2Relevant articles and documents
Bipyridyl/carbazolate silver(I) and gold(I) N-heterocyclic carbene complexes: A systematic study of geometric constraints and electronic properties
Das Adhikary, Sirsendu,Mondal, Ambarish,Kisan, Hemanta K.,Bielawski, Christopher W.,Dinda, Joydev
, (2020)
A series of silver(I) and gold(I) carbene complexes of the type [M(L)(2,2′-bipyridine)][PF6] (L = 1-benzyl-3-(2-pyridylmethyl)benzimidazolylidene; M = Ag (1); M = Au (3)) and [M(L)(carbazole)] (M = Ag (2); M = Au (4)) were synthesized and analy
Palladium immobilized on functionalized hypercrosslinked polymers: A highly active and recyclable catalyst for Suzuki-Miyaura coupling reactions in water
Liu, Xi,Xu, Wei,Xiang, Dexuan,Zhang, Zaixing,Chen, Dizhao,Hu, Yangjian,Li, Yuanxiang,Ouyang, Yuejun,Lin, Hongwei
supporting information, p. 12206 - 12210 (2019/08/12)
Heterogeneous catalysts have shown advantages such as high stability, good recyclability and easy separation from reactants over homogeneous catalysts in recent years. In this paper, three pyridine-functionalized N-heterocyclic carbene-palladium complexes (HCP-Pd) were successfully synthesized via a simple external cross-linking reaction. In each catalyst (i.e., complex), palladium (Pd) was immobilized on the hypercrosslinked polymer (HCP) via formation of a six-membered ring by Pd2+ and the bidentate ligands of NHC and pyridine. The structure and composition of HCP-Pd were characterized by SEM, TEM, N2 sorption, FT-IR, TGA and XPS. The catalytic performances of these catalysts in a Suzuki-Miyaura coupling reaction were also studied. The results prove that HCP-Pd is a very effective heterogeneous catalyst for the Suzuki-Miyaura coupling reaction of various aryl halides with aryl boronic acid in an aqueous medium under mild conditions.
Environmental friendly azide-alkyne cycloaddition reaction of azides, alkynes, and organic halides or epoxides in water: Efficient "click" synthesis of 1,2,3-triazole derivatives by Cu catalyst
Liu, Jianming,Liu, Muwen,Yue, Yuanyuan,Yao, Meihuan,Zhuo, Kelei
experimental part, p. 644 - 650 (2012/05/20)
An efficient click synthesis of 1,2,3-triazole derivatives from benzyl halides or alkyl halides, epoxides, terminal alkynes, and sodium azides in the presence of copper salts and relative benzimidazole salts have been developed. This procedure eliminates the need to handle potentially organic azides, which are generated in situ. A broad spectrum of substrates can participate in the process effectively to produce the desired products in good yields.
New structural motifs of silver and gold complexes of pyridine-functionalized benzimidazolylidene ligands
Zhang, Xiaoming,Gu, Shaojin,Xia, Qinqin,Chen, Wanzhi
experimental part, p. 2359 - 2367 (2009/09/30)
Reaction of 1,3-bis(picolyl)benzimidazolium chloride ([HL1]Cl) with Ag2O yields mononuclear complex [Ag(L1)Cl] (2), further reaction of 2 with Au(Et2S)Cl afforded [Au(L1)Cl] (3). Treatment of 2 with AgBF4 gave the trinuclear silver cluster [Ag3(L1)3](BF4)3 (4), whereas the digold complex [Au2(L1)2](BF4)2 (5) can be easily obtained from the carbene transfer reaction of 4 with Au(Et2S)Cl. A one-dimensional coordination polymer {[Ag(L2)](BF4) · CH3CN}n (8) was isolated from the reaction of [Ag(L2)Cl] (7, L2 = 1-benzyl-3-picolylbenzimidazolylidene) with additional Ag+ in good yield. The dinuclear [Ag2(L3)2](PF6)2 (12, L3 = 1,4-di(N-benzylbenzimidazolylidene)but-2-yne) is a 18-membered macrocycle. All these complexes have been structurally characterized. Complex 2 shows a dimeric structure because of intermolecular Ag?Cl interactions. Complex 4 consists of a triangular Ag3 ring with very short Ag-Ag contacts 2.777(1) A?, the Au-Au distance in 5 is 3.206(2) A? showing very weak Au-Au interaction and the macrocyclic cations in 12 are aligned one above another to form channels filled with hexafluorophosphate anions. The complexes 2-5, 8, and 12 are intensely luminescent upon irradiation of uv light, and their emission properties are briefly described.
