Pd-Catalyzed Aryl Amination Mediated by Well Defined, N-Heterocyclic Carbene (NHC)–Pd Precatalysts, PEPPSI
作者:Michael G. Organ、Mirvat Abdel-Hadi、Stephanie Avola、Igor Dubovyk、Niloufar Hadei、Eric Assen B. Kantchev、Christopher J. O'Brien、Mahmoud Sayah、Cory Valente
DOI:10.1002/chem.200701621
日期:2008.3.7
Pd-N-heterocyclic carbene (NHC)-catalyzed Buchwald-Hartwig amination protocols mediated by Pd-PEPPSI precatalysts is described. These protocols provide access to a range of hindered and functionalized drug-like aryl amines in high yield with both electron-deficient and electron-rich aryl- and heteroaryl chlorides and bromides. Variations in solvent polarity, base and temperature are tolerated, enhancing
描述了由Pd-PEPPSI预催化剂介导的Pd-N-杂环卡宾(NHC)催化的Buchwald-Hartwig胺化方案。这些方案可提供高收率的一系列受阻和功能化的药物样芳基胺,以及缺电子和富电子的芳基氯化物和杂芳基氯化物和溴化物。溶剂极性,碱和温度的变化是可以容忍的,从而增强了该协议的范围和实用性。还提供了对基础强度(pKb)要求的机械合理性。