通过由市售和廉价的2-氨基硝基苯酚制备的2-碘硝基苯酚乙酸酯的Sonogashira交叉偶联反应已经实现了4-,5-和6-硝基苯并[ b ]呋喃的首次合成。将获得的2-炔基硝基苯酚乙酸酯在室温下进行KO t Bu促进的环化反应以形成硝基苯并[ b ]呋喃。给出了其他取代苯并[ b ]呋喃的合成和一锅偶联-环化的例子。
The first total synthesis of Cicerfuran utilizing a one-pot synthesis of hydroxylated benzofurans
摘要:
A simple one-pot procedure was elaborated for the preparation of hydroxylated benzofurans from halogenated phenols and was successfully applied to the first total synthesis of Cicerfuran, a natural defence agent of wild chickpea. (C) 2003 Elsevier Ltd. All rights reserved.