Tetrahedron Letters

Gallium (III) triflate-catalyzed synthesis of quinoxaline derivatives

JJ Cai, JP Zou, XQ Pan, W Zhang

文献索引：Cai, Jing-Jing; Zou, Jian-Ping; Pan, Xiang-Qiang; Zhang, Wei Tetrahedron Letters, 2008 , vol. 49, # 52 p. 7386 - 7390

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被引用次数: 119

摘要

Over the years, numerous synthetic methods for preparation of quinoxalines have been reported in the literature. 7 Among them, the condensation of 1,2-aryldiamine with 1,2-diketone in refluxing ethanol or acetic acid is a general approach. 8 Research effort has been focused on finding new catalysts to improve the yield of this condensation reaction. In addition to common Lewis acids, many other catalysts including I 2 , 9a and 9b SA, 9c Montmorillonite K-10, 9d SSA, ...