A Cyclobutene-1,2-bis(imidazolium) Salt as Preligand for Palladium-Catalyzed Cross-Coupling Reactions: Properties and Applications

作者：Rahimi Alireza; Papai Imre; Madarasz Adam; Gjikaj Mimoza; Namyslo Jan C; Schmidt Andreas^*

来源：European Journal of Organic Chemistry, 2012, (4): 754-763.

DOI：10.1002/ejoc.201101378

• Nitrogen heterocycles
• Arylation
• Palladium
• Cross-coupling
• Carbenes

Spectroscopic investigations and the results of calculations on the title bis-imidazolium salt, its mono- and bis-carbenes, and its interactions with palladium are presented. In addition, we report on the scope and limitations of metal-catalyzed cross-coupling reactions performed with the title bis-imidazolium salt. The salt proved to be an efficient ligand precursor in room-temperature SuzukiMiyaura reactions, CC couplings with sterically extremely hindered biaryls,selective thiophene arylations, and couplings with vinylic chlorides.

• 出版日期2012-2