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。
An Efficient New Method for the Synthesis of Polysubstituted Pyrroles¹
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’.
Synthesis of polysubstituted pyrroles in aqueous medium directly from nitro compounds
作者:L. Madhava Reddy、P. Chandrashekar、A. R. Reddy、C. K. Reddy
DOI:10.1134/s1070363215010272
日期:2015.1
A novel approach for the synthesis of polysubstituted pyrroles has been followed through multicomponent reaction of nitro compounds, phenacyl bromide or its derivatives and dialkyl acetylene dicarboxylates using indium in dilute aqueous HCl at room temperature. The products are formed in high yields (75-87%) in 10-16 h.
Novel and efficient supramolecular synthesis of pyrroles in the presence of β-cyclodextrin in water
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.
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.