Highly Efficient Synthesis of Multisubstituted Furans through Cupric Halide-Mediated Intramolecular Halocyclization of 1-(1-Alkynyl)cyclopropyl Ketones
作者:Mei Zhu、Wei-Jun Fu、Chen Xu、Guang-Long Zou、Zhi-Qiang Wang、Bao-Ming Ji
DOI:10.1002/ejoc.201200601
日期:2012.8
A convenient and efficient method for the synthesis of 3-halofurans was developed by using a cascade reaction between 1-(1-alkynyl)cyclopropyl ketones and cupric halide. Under mild reaction conditions, both 3-chloro- and 3-bromofuran derivatives were obtained in high yields. The reaction involves consecutive multiple bond formations, includingC–O and C–Br bonds, with high regioselectivity. Mechanistic
通过使用 1-(1-炔基) 环丙基酮和卤化铜之间的级联反应,开发了一种方便有效的合成 3-卤代呋喃的方法。在温和的反应条件下,3-氯-和3-溴呋喃衍生物均以高产率获得。该反应涉及连续的多重键形成,包括 C-O 和 C-Br 键,具有高区域选择性。描述了机械方面。