作者:Catherine J. Smith、Melanie W. S. Tsang、Andrew B. Holmes、Rick L. Danheiser、Jefferson W. Tester
DOI:10.1039/b509345g
日期:——
Palladium catalysed C-N bond formation in supercritical carbon dioxide has been accomplished. Carbamic acid formation is avoided in part through the use of an N-silylamine as the coupling partner. Employing a catalyst system of Pd2dba3(1 mol%) and 2-dicyclohexylphosphino-2',4',6'-triisopropyl-1,1'-biphenyl (X-Phos)(2 mol%) enabled the catalytic amination of aryl bromides and chlorides with N-silylanilines
已经完成了钯在超临界二氧化碳中催化的CN键形成。通过使用N-甲硅烷基胺作为偶联伴侣,可部分避免氨基甲酸的形成。使用Pd2dba3(1 mol%)和2-二环己基膦基2',4',6'-三异丙基-1,1'-联苯(X-Phos)(2 mol%)的催化剂体系能够催化芳基溴化物的胺化和氯化物与N-甲硅烷基苯胺的合成,可实现出色的收率。据报道,该方法扩展到了N-甲硅烷基二芳基胺,N-甲硅烷基唑和N-甲硅烷基磺酰胺的N-芳基化反应。