Synthesis of Well-Defined Diphenylvinyl(cyclopropyl)phosphine-Palladium Complexes for the Suzuki-Miyaura Reaction and Buchwald-Hartwig Amination
作者:Naota Yokoyama、Yuji Nakayama、Hideki Nara、Noboru Sayo
DOI:10.1002/adsc.201300332
日期:2013.7.8
diphenylvinylphosphine‐palladium complex 1 and the diphenylcyclopropylphosphine‐palladium complex 2 were successfully synthesized. The crystal structures of these complexes were obtained by X‐ray crystallographic analysis. Both complexes were air‐ and moisture‐stable, and could be prepared on a gram scale. These palladium complexes catalyzed the Suzuki–Miyaura reaction of aryl bromides [turnover numbers
定义明确的二苯基乙烯基膦-钯配合物1和二苯基环丙基膦-钯配合物2已成功合成。这些配合物的晶体结构是通过X射线晶体学分析获得的。两种配合物都具有空气和水分稳定性,可以克量级制备。这些钯配合物催化了芳基溴化物(周转数(TON)至196,000)和芳基氯化物(TON最高至50,000)的Suzuki-Miyaura反应。此外,配合物2催化了低负载量的芳基氯化物和芳族/脂肪族胺的布赫瓦尔德-哈特维格胺的胺化反应。这些配合物对2-氯吡啶的偶联反应具有不同的反应性,并讨论了这种差异的起源。