三氯化稀土催化下二乙氧基缩苯乙酮与乙酰氯的反应——合成1,3,5-三芳基苯的新方法

报道催化量的三氯化钐存在下,乙酰氯与二乙氧基缩苯乙酮反应,高产率地得到1,3,5-三苯基苯.采用不同的溶剂及不同的稀土氯化物该反应均能顺利进行.此方法是一种合成1,3,5-三芳基苯类化合物的方便和有效的方法.文中对反应机理进行了讨论.

1,3,5-三芳基苯的合成及研究进展

1,3,5-三芳基苯因其特殊对称结构以及卓越的光、电、磁特性,被广泛应用于构筑树枝状大分子和各种聚苯化合物的核芯模块。本文主要介绍了1,3,5-三芳基苯合成方法的发展近况,以及几种有代表性的合成方法。

Synthesis of biaryls using palladium nanoparticles immobilized on peptide nanofibers as catalyst and hydroxybenzotriazole as novel phenylating reagent

Peptide nanofibers decorated with palladium nanoparticles catalyzed direct coupling of aryl halides with hydroxybenzotriazole to afford the corresponding biaryls in good to excellent yields.The coupling reactions proceeded under simple,green,and mild conditions.The peptide nanofibers were used as recyclable supports in the coupling reactions.This approach is the first to use hydroxybenzotriazole as a phenylating agent.