Stilbene synthesis through decarboxylative cross-coupling of substituted cinnamic acids with aryl halides
作者:Nelly Rameau、Baptiste Russo、Stéphane Mangematin、Catherine Pinel、Laurent Djakovitch
DOI:10.1016/j.apcata.2018.04.031
日期:2018.6
acid and aryl iodide derivatives was studied using both homogeneous and heterogeneous Pd-catalysts. It was demonstrated that simple Pd(OAc)2 can catalyze this reaction with useful to high yields when engaging ferulic acid whatever the nature of the aryl iodide. However, limitations were found when varying the nature of the cinnamic acid derivatives mainly due to low decarboxylation process. This could
使用均相和非均相钯催化剂,研究了肉桂酸与芳基碘化物衍生物之间的钯催化的脱羧交叉偶联反应。已证明,无论芳基碘化物的性质如何,当与阿魏酸接合时,简单的Pd(OAc)2都可以高产率地催化该反应。然而,当改变肉桂酸衍生物的性质时,发现局限性主要是由于低脱羧过程。在某些情况下,可以通过添加Cu(OH)2 / 1,10-菲咯啉作为助催化剂来克服这一问题。在存在非均相催化剂的情况下,研究表明,Pd / C和自制的Pd / SiO 2催化剂均可提供较高的产品收率。然而,尽管活性较低,但已证明Pd / SiO由于具有较高的稳定性,因此2种催化剂可在至少4个循环中重复使用。