amination and subsequent thermal intramolecular amidation, has been established for efficient one-pot synthesis of 4H-benz[1,4]oxazin-3-ones from anilines and 2-(2-halophenoxy)alkanoates. Use of Cs2CO3 as the base was found to be determinant for the process and alkyl groups attached to the α position of alkanoates are beneficial for achieving good yields. Various substrates were compatible to afford the desired
已经建立了一种由Pd催化的分子间胺化和随后的分子内热酰胺化反应组成的级联过程,可从
苯胺和2-(2-卤代苯氧基)有效一锅合成4 H-苯并[1,4]恶嗪-3-酮。 )链烷酸酯。发现使用Cs 2 CO 3作为碱是该方法的决定性因素,并且连接至链烷酸酯α位的烷基有利于获得良好的收率。各种底物相容,以良好至优异的产率提供所需的产物。这是合成4 H-苯并[1,4]恶嗪-3-酮文库的有吸引力的方法。 级联反应-
钯催化-胺化-4 H-苯并[1,4]恶嗪-3-酮-内酰胺化