Applications of quinoxaline‐bridged bis(benzimidazolium) salts as ligand sources for the palladium‐catalyzed Suzuki and Heck cross‐coupling reactions in an aqueous medium
作者:Serpil Demir Düşünceli、Mehmet Hanifi Şahan、Murat Kaloğlu、Elvan Üstün、İsmail Özdemir
DOI:10.1002/jccs.202200304
日期:2022.11
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
在目前的工作中,通过 2,3-双(溴甲基)喹喔啉和 1-取代苯并咪唑的反应制备了喹喔啉桥联双(苯并咪唑)盐。bis(benzimidazolium) 盐的结构通过 NMR、FT-IR 和元素分析技术进行了表征。此外,盐的光物理性质通过紫外-可见吸收和荧光发射光谱进行了研究。接下来,这些喹喔啉桥联双(苯并咪唑)盐被用作钯催化的 Suzuki-Miyaura 和 Mizoroki-Heck 交叉偶联中的双齿苯并咪唑-2-亚基配体前体。这些盐在钯催化的交叉偶联反应中表现出中高活性。