The reaction of ethyl acetoacetate and 2′-hydroxychalcones under atmospheric air to furnish a series of functionalized 6H-benzo[c]chromen-6-ones in moderate yields is reported. The reaction proceeds through trans-esterification, intra-molecular Michael addition, Robinson annulation and oxidative aromatization.
报告了一种在常压空气下,
乙酰乙酸乙酯与
2'-羟基查尔酮反应,以中等产率合成一系列功能化的6H-苯并[c]色烯-6-酮的方法。该反应过程涉及酯交换、分子内迈克尔加成、罗宾逊环化以及氧化芳构化。