Pd-catalyzed amination as an alternative to nucleophilic aromatic substitution for the synthesis of N-alkyltacrines and analogs
作者:Ming Ma、Jimit Mehta、Larry D. Williams、Paul R. Carlier
DOI:10.1016/j.tetlet.2010.12.073
日期:2011.2
amination protocol is described for the synthesis of N-alkyltacrines and analogs. The Josiphos ligand CyPFtBu was found to provide optimum yields: 16 examples are given. Compared to the typical high-temperature nucleophilic aromatic substitution (NAS) routes, Pd-catalyzed aminations proceed at significantly lower reaction temperatures, and enable the synthesis of otherwise inaccessible products.
描述了一种可靠的 Pd 催化胺化方案,用于合成N-烷基他克林和类似物。发现Josiphos 配体 CyPF t Bu 提供最佳产率:给出了 16 个例子。与典型的高温亲核芳香取代 (NAS) 路线相比,Pd 催化的胺化反应在显着较低的反应温度下进行,并且能够合成原本无法获得的产物。