A new and efficient one-pot synthesis of polysubstituted pyrrole derivatives by a three-component reaction between dialkyl acetylenedicarboxylates, aromatic amines, triphenylphosphine, and arylglyoxals is described. The reactions were performed in dichloromethane at room temperature and neutral conditions and afforded high yields of products.
A simple and efficient synthesis of highly substituted pyrroles was achieved in water medium via multi-component strategy, using amine, DMAD/DEAD as well as phenacyl bromide catalyzed by beta-CD. Utilizing this protocol various pyrrole derivatives were synthesized in good to excellent yields. (C) 2012 Y.V.D. Nageswar. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
Convenient synthesis of polysubstituted pyrroles and symmetrical and unsymmetrical bis-pyrroles catalyzed by H3PW12O40
作者:Mohammad Soltani、Iraj Mohammadpoor-Baltork、Ahmad R. Khosropour、Majid Moghadam、Shahram Tangestaninejad、Valiollah Mirkhani
DOI:10.1016/j.crci.2015.11.006
日期:2016.3
mild and environmentally-benign protocol for the efficient synthesis of polysubstituted pyrroles via a one-potthree-componentreaction of amines, α-bromo ketones and dialkyl acetylenedicarboxylate using H 3 PW 12 O 40 as a recyclable heterogeneous catalyst under solvent-free conditions at room temperature is reported. Importantly, the synthesis of symmetrical and unsymmetrical polysubstituted bis-pyrroles
摘要 使用 H 3 PW 12 O 40 作为可回收的多相催化剂,在无溶剂条件下,通过胺、α-溴酮和乙炔二羧酸二烷基酯的一锅三组分反应高效合成多取代吡咯的温和且环境友好的方案报告了室温条件。重要的是,对称和不对称多取代双吡咯的合成首次以良好的产量进行,这可以被视为该协议的一个显着特征。