Synthesis of <i>E</i>- and <i>Z-o</i>-Methoxy-Substituted 2,3-Diphenyl Propenoic Acids and Its Methyl Esters
作者:Károly Felföldi、Mária Sutyinszky、Nóra Nagy、István Pálinkó
DOI:10.1080/00397910008087187
日期:2000.4.1
A series of stereoisomeric o-methoxy-substituted 2,3-diphenyl propenoic acids and their methyl esters have been synthesized. The E isomers were prepared by a modified Perkin condensation (substituted benzaldehyde, phenylacetic acid, Et3N/acetic anhydride). The difficult to access Z isomers were obtained conveniently in good yields when the appropriate coumarin derivatives were allowed to react with
摘要 合成了一系列立体异构的邻甲氧基取代的2,3-二苯基丙烯酸及其甲酯。E 异构体通过改进的 Perkin 缩合(取代的苯甲醛、苯乙酸、Et3N/乙酸酐)制备。当合适的香豆素衍生物在DMSO中与KOH和CH 3 I反应时,难于获得的Z异构体可以以良好的产率方便地获得。