作者:Valérie Collot、Elodie Lohou、Silvia Stiebing、Sylvain Rault
DOI:10.1055/s-0030-1260110
日期:2011.8
An efficient synthesis of various N-substituted 3-aminoindazoles using Buchwald-Hartwig C-N coupling reaction is described. Several parameters were varied, including the nature of the halogen atom and the protecting group of the starting materials, as well as the effects of the catalyst system, base, solvent, and reaction time. The efficiency of microwave versus conventional heating was also compared to test the outcome of the reaction. Thus, by applying this recent knowledge about metal-catalyzed aminations, an alternative for the direct synthesis of primary 3-aminoindazoles has been provided.
描述了一种高效合成多种N取代3-氨基吲哚唑的方法,该方法使用了Buchwald-Hartwig C-N偶联反应。研究了多个参数的变化,包括卤素原子的性质、起始材料的保护基团,以及催化剂体系、碱、溶剂和反应时间的影响。同时还比较了微波加热与传统加热的效率,以测试反应的结果。因此,通过应用关于金属催化氨基化的最新知识,提供了一种直接合成初级3-氨基吲哚唑的替代方案。