A Cyclobutene-1,2-bis(imidazolium) Salt as Preligand for Palladium-Catalyzed Cross-Coupling Reactions: Properties and Applications
作者:Alireza Rahimi、Imre Pápai、Ádám Madarász、Mimoza Gjikaj、Jan C. Namyslo、Andreas Schmidt
DOI:10.1002/ejoc.201101378
日期:2012.2
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-couplingreactions performed with the title bis-imidazolium salt. The salt proved to be an efficient ligand precursor in room-temperature Suzuki–Miyaura reactions, C–C couplings with sterically extremely
successful programmed synthesis of diversedesigns of tetraphenylthiophene derivatives (TPTs, 16 out of 24 probable structures) and the intermediate triphenylthiophene derivatives (12 out of 20 probable structures) using optimized ‘classical’ Suzuki-Miyaura cross-coupling conditions through multiple routes starting from a single precursor, tetrabromothiophene. Our first-ever electrochemical analysis of various