Synthesis of New Diphosphine Ligands and their Application in Pd-Catalyzed Alkoxycarbonylation Reactions
作者:Anahit Pews-Davtyan、Xianjie Fang、Ralf Jackstell、Anke Spannenberg、Wolfgang Baumann、Robert Franke、Matthias Beller
DOI:10.1002/asia.201301636
日期:2014.4
Carbocyclic and N‐heterocyclic analogues of the industrially applied ligand bis(di‐tert‐butylphosphinomethyl)benzene (1) have been synthesized in moderate to very good yields. The new ligands are based on benzene, tetralin, lutidine, pyrazine, quinoxaline, and maleimide backbones. Electronic and steric variations of the phosphorous donor sites were performed. As a benchmark reaction, the palladium‐catalyzed
工业应用的配体双(二叔丁基膦基甲基)苯(1)的碳环和N杂环类似物的合成产率中等至非常高。新的配体基于苯,四氢萘,二甲基吡啶,吡嗪,喹喔啉和马来酰亚胺骨架。进行了磷供体位点的电子和空间变化。作为基准反应,已经测试了钯催化的1-辛烯的甲氧基羰基化。酯产率高达64%,线性选择性高达92%。