Polyethylene glycol (PEG-400) as an efficient and recyclable reaction medium for one-pot synthesis of polysubstituted pyrroles under catalyst-free conditions
Polyethyleneglycol (PEG) was found to be an inexpensive non-toxic and effective medium for the one-pot synthesis of highly functionalized pyrroles. Utilizing this protocol various pyrrole derivatives were synthesized in excellent yields. Environmental acceptability, low cost, high yields, and recyclability of the PEG are the important features of this protocol.
The three-component reactions of phenacyl bromide or its derivatives, amine, and dialkyl acetylenedicarboxylate in the presence of iron(III) chloride as a catalyst at room temperature afforded polysubstituted pyrroles in high yields. polysubstituted pyrroles - three-component reaction - iron(III) chloridePart 283 in the series ‘Studies on Novel Synthetic Methodologies’.
Catalyst application of ZnO nanostructures in solvent free synthesis of polysubstituted pyrroles
作者:Maryam Sabbaghan、Azam Ghalaei
DOI:10.1016/j.molliq.2013.12.018
日期:2014.5
A simple, rapid, efficient, and environmentally benign procedure for synthesis of polysubsfituted pyrroles has been achieved by the three-component reaction of amines, phenacyl bromide and dialkyl acetylenedicarboxylates under solvent free conditions using nano structures of ZnO as catalyst. Different morphologies such as nanorods and nanosheets of catalysis have been synthesized by simple reflux method using sodium dodecylsulfate (SDS) and applied in this reaction. Nanorod ZnO catalyst exhibited a significant enhancement in the yield of the desired product. The catalyst exhibited remarkable reusable activity. (C) 2013 Elsevier B.V. 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。