synthesis of 3-carboxy-2,5-disubstituted furans is reported proceeding via a 5-exo-dig cycloisomerization reaction. The iron(III) chloride-catalyzed transformation of aryl- and alkyl β-ketoesters enables synthetic access to functionalized furan core structures found in many natural products and complex molecules of biological importance. The method described herein, represents a mild and efficient alternative
据报道,通过5-exo-dig环异构化反应进行了温和的催化方法,用于合成3-羧基-2,5-二取代的
呋喃。
氯化
铁催化的芳基和烷基β-
酮酸酯的转化使得能够合成获得许多
天然产物和具有
生物学重要性的复杂分子中发现的功能化
呋喃核心结构。本文描述的方法代表了当前可用反应方案的温和而有效的替代方案。