Applications of quinoxaline-bridged bis(benzimidazolium) salts as ligand sources for the palladium-catalyzed Suzuki and Heck cross-coupling reactions in an aqueous medium

被引:2
|
作者
Dusunceli, Serpil Demir [1 ,2 ,3 ]
Sahan, Mehmet Hanifi [1 ]
Kaloglu, Murat [1 ,2 ,3 ]
Ustun, Elvan [4 ]
Ozdemir, Ismail [1 ,2 ,3 ]
机构
[1] Inonu Univ, Fac Sci & Arts, Dept Chem, TR-44280 Malatya, Turkey
[2] Inonu Univ, Catalysis Res & Applicat Ctr, Malatya, Turkey
[3] Inonu Univ, Drug Applicat & Res Ctr, Malatya, Turkey
[4] Ordu Univ, Fac Sci & Art, Dept Chem, Ordu, Turkey
关键词
bis(benzimidazolium) salt; Heck coupling; N-heterocyclic carbene; palladium; quinoxaline; Suzuki coupling; N-HETEROCYCLIC CARBENE; PALLADIUM/IMIDAZOLIUM SALT; ARYL BROMIDES; PRECURSORS SYNTHESIS; COMPLEXES SYNTHESIS; OLEFIN METATHESIS; KINETIC STABILITY; PHOSPHINE-LIGANDS; BOND FORMATION; BASIS-SETS;
D O I
10.1002/jccs.202200304
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
In the present work, quinoxaline-bridged bis(benzimidazolium) salts were prepared by the reaction of 2,3-bis(bromomethyl) quinoxaline and 1-substituted benzimidazole. The structures of the bis(benzimidazolium) salts were characterized by NMR, FT-IR, and elemental analysis techniques. Also, the photophysical properties of salts were investigated by UV-Vis absorption and fluorescence emission spectroscopy. Next, these quinoxaline bridged bis(benzimidazolium) salts were used as bidentate benzimidazol-2-ylidene ligand precursors in the palladium-catalyzed Suzuki-Miyaura and Mizoroki-Heck cross-couplings. These salts exhibited moderate-to-high activity in the palladium-catalyzed cross-coupling reactions.
引用
收藏
页码:1937 / 1953
页数:17
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