An Easy Stereoselective Copper(I)-Catalyzed Synthesis of (E)-3-Trifluoromethylbut-2-en-3-ynoate via Palladium-Free Stille Coupling Reaction
作者:Mohamed Abarbri、Khalid Zine、Julien Petrignet、Jérôme Thibonnet
DOI:10.1055/s-0031-1290596
日期:2012.3
A general and efficient Cu(I)-catalyzed cross-coupling reaction of alkynyl bromides and β-tributylstannyl-α,β-unsaturated ester bearing a trifluoromethyl group in β-position was developed under very mild conditions. This method provides easy access to a variety of 2,3-enynoate bearing a trifluoromethyl group from good to excellent yields with excellent stereoselectivity. This procedure does not require
在非常温和的条件下,开发了一种通用且有效的Cu(I)催化炔基溴化物与在β位带有三氟甲基的β-三丁基锡烷基-α,β-不饱和酯的交叉偶联反应。该方法可容易地获得具有良好立体选择性的从良好产率到优异产率的各种带有三氟甲基的2,3-烯丙酸酯。该步骤不需要使用任何昂贵的补充添加剂,并且不含钯。 β-三丁基锡烷基-α,β-不饱和酯-无钯-铜催化剂-三氟甲基丁-2-烯-3-壬酸酯