Copper-Catalyzed Coupling of 2-Siloxy-1-alkenes and Diazocarbonyl Compounds: Approach to Multisubstituted Furans, Pyrroles, and Thiophenes
作者:Wei Wen Tan、Naohiko Yoshikai
DOI:10.1021/acs.joc.6b00904
日期:2016.7.1
We report herein copper(II)-catalyzed cyclization reactions of silyl enol ethers derived from methyl ketones with α-diazo-β-ketoesters or α-diazoketones to afford 2-siloxy-2,3-dihydrofuran derivatives or 2,3,5-trisubstituted furans, respectively, under mild conditions. The former cyclization products serve as versatile 1,4-diketone surrogates, allowing facile preparation of 2,3,5-trisubstituted furans
我们在本文中报道了铜(II)催化的甲基酮衍生的甲硅烷基烯醇醚与α-重氮-β-酮酸酯或α-二氮酮的环化反应,从而提供2-siloxy-2,3-dihydrofuran衍生物或2,3,5-三取代的呋喃,分别在温和的条件下。以前的环化产品可以用作通用的1,4-二酮替代物,从而可以轻松制备2,3,5-三取代的呋喃,吡咯和噻吩。