作者:Henning Hopf、Peter G. Jones、Alina Nicolescu、Elena Bicu、Lucian M. Birsa、Dalila Belei
DOI:10.1002/chem.201400329
日期:2014.5.5
A facile synthesis of Pechmann dyes has been accomplished by the reaction of substituted N‐phenacyl‐4‐dimethylaminopyridinium halides with dimethyl maleate in the presence of DBU. Based on a related 4‐DMAP elimination product and an isolated monolactone intermediate a reaction mechanism has been proposed. The scope of this synthetic method is determined by the availability of α‐haloaroyl or heteroaroyl
在DBU存在下,取代的N-苯甲酰基-4-二甲基氨基吡啶卤化物与马来酸二甲酯反应可以轻松实现Pechmann染料的合成。基于相关的4-DMAP消除产物和分离的单内酯中间体,已提出了反应机理。这种合成方法的范围取决于α-卤代芳基或杂芳基衍生物的可用性。DBU = 1,8-二氮杂双环十一碳-7-烯,DMAP = 4-二甲基氨基吡啶。