Synthesis of 2,5-Diarylpyrroles by Ligand-Free Palladium-Catalyzed CH Activation of Pyrroles in Ionic Liquids
作者:Peter Ehlers、Andranik Petrosyan、Jens Baumgard、Stefan Jopp、Norbert Steinfeld、Tariel V. Ghochikyan、Ashot S. Saghyan、Christine Fischer、Peter Langer
DOI:10.1002/cctc.201300099
日期:2013.8
The palladium‐catalyzed CH activation and arylation of N‐methylpyrrole and N‐phenylpyrrole allowed a convenient synthesis of diarylpyrroles. The reactions were performed by using tetrabutylammonium acetate as an ionic solvent, which allowed for the application of a ligand‐free catalytic system by using simple palladium salts or polyvinylpyrrolidone‐stabilized palladium nanoparticles as the catalyst
钯催化的CH活化和
N-甲基吡咯和N-苯基
吡咯的芳基化使得二芳基
吡咯的合成方便。反应是通过使用
乙酸四丁
铵作为离子溶剂进行的,该反应可以通过使用简单的
钯盐或聚
乙烯吡咯烷酮稳定的
钯纳米颗粒作为催化剂来应用无
配体的催化体系。