Synthesis of 4-Aminoquinazolines by Palladium-Catalyzed Intramolecular Imidoylation of N-(2-Bromoaryl)amidines
作者:Gitte Van Baelen、Sander Kuijer、Lukáš Rýček、Sergey Sergeyev、Elwin Janssen、Frans J. J. de Kanter、Bert U. W. Maes、Eelco Ruijter、Romano V. A. Orru
DOI:10.1002/chem.201102468
日期:2011.12.23
investigated the intramolecular imidoylative cross‐coupling of N‐(2‐bromoaryl)amidines, leading to 4‐aminoquinazolines. After thorough optimization of the reaction with respect to palladium source and loading, ligand, base, temperature, and solvent, a small library of 4‐aminoquinazolines was prepared to determine the scope of this method. Various substituents are tolerated on the amidine and the isocyanide
与广泛使用羰基化Pd催化的交叉偶联反应相比,涉及异氰酸酯插入的类似反应几乎处于空白。我们研究了N-(2-溴芳基)am的分子内酰亚胺化交叉偶联,从而导致了4-氨基喹唑啉。在对钯源和负载,配体,碱,温度和溶剂的反应进行了全面优化之后,准备了一个小的4-氨基喹唑啉文库来确定该方法的范围。idine和异氰酸酯上可以容忍各种取代基,从而有效地获得了广泛的具有广泛药学意义的各种取代的4-氨基喹唑啉。