Regiocontrolled Hydroarylation of (Trifluoromethyl)acetylenes in Superacids: Synthesis of CF<sub>3</sub>-Substituted 1,1-Diarylethenes
作者:Haider M. H. Alkhafaji、Dmitry S. Ryabukhin、Vasiliy M. Muzalevskiy、Aleksander V. Vasilyev、Georgy K. Fukin、Alexey V. Shastin、Valentine G. Nenajdenko
DOI:10.1002/ejoc.201201375
日期:2013.2
trifluoromethylated vinyl cations was confirmed by DFT calculations. The stable 2,2,2-trifluoroethylated carbocation reaction intermediates were observed by 1H, 13C, and 19F NMR spectroscopy. Under treatment with aluminium bromide, the reaction of 3,3,3-trifluoro-1-phenylpropyne with benzene formed 1,3,3-triphenylindene. The hydration of aryl(trifluoromethyl) alkynes in sulfuric or trifluoroacetic acids smoothly produced
研究了芳基(三氟甲基)取代的炔烃和芳烃在三氟甲磺酸和氟磺酸中的反应。这些反应以 100% 的区域选择性进行,以高产率得到 1,1-二芳基-2-三氟甲基乙烯。根据后处理条件,在产物混合物中也检测到 3,3,3-三氟-1,1-二芳基丙-1-醇。通过光谱和理论方法研究了反应机理。DFT 计算证实了三氟甲基化乙烯基阳离子的高反应性。通过 1H、13C 和 19F NMR 光谱观察到稳定的 2,2,2-三氟乙基化碳阳离子反应中间体。在溴化铝处理下,3,3,3-三氟-1-苯基丙炔与苯反应生成1,3,3-三苯基茚。