addition of methoxy- and fluoroanilines with 1,4-naphthoquinone to give methoxy- and fluoro-substituted 2-(anilino)-1,4-naphthoquinones was investigated. In the absence of a catalyst, this reaction requires long times and low yields of the anilino derivatives are obtained accompanied with the formation of several secondary products. Excellent yields were obtained with a catalytic amount of a Lewis acid
研究了催化剂对
1,4-萘醌加甲氧基和
氟苯胺生成甲氧基和
氟取代的2-(
苯胺基)-
1,4-萘醌的影响。在没有催化剂的情况下,该反应需要长时间并且获得低产率的
苯胺基衍
生物,并伴随着几种副产物的形成。用催化量的具有强氧化性能的
路易斯酸(例如CeCl 3或FeCl 3)获得了优异的收率。当用布朗斯台德酸/氧化剂混合物例如AcOH / Cu(OAc)2进行反应时,也获得了优异的产率。还使用微波辐射研究了该加成反应。讨论了反应条件和机理。这使用二维1 H– 13 C gHSQC和gHMBC NMR实验分析并分配了所有衍
生物的1 H和13 C NMR数据。还研究了
氟取代对氧化还原和NMR性能的影响。