30011-04-2Relevant academic research and scientific papers
A novel bi-functional surfactant-based paramagnetic deep-eutectic catalyst for improved benzoin condensation and multi-component synthesis of pyrrole derivatives
Tamaddon, Fatemeh,Tadayonfar, SeydEhsan
, p. 71 - 78 (2019/02/19)
A new professional magnetic surfactant-based deep-eutectic (DE) and viscose liquefy catalyst (GS2+·2FeCl4, MGSFe) was synthesized by an optimized reaction of the as-prepared cationic gemini-surfactant (GS) with two moles of FeCl3·6H2O. The structure of the GS and MGSFe were characterized by NMR, FT-IR, UV–visible, CHN, pH, surface tension (?), and vibrating sample magnetometry (VSM) analyses. The MGSFe, that is a high viscose brownish liquid at >50 °C, was successfully tested as a highly active paramagnetic catalyst for improved benzoin condensation and three-component synthesis of substituted pyrroles with the highest turnover number (TON) and turnover frequency (TOF) that ever reported for this purpose. The superior activity of MGSFe is due to its amphiphile properties, the synergistic effects between GS2+ and 2FeCl4 ? as hydrogen-bond-donor and magnetic hydrogen-bond-acceptor components of this novel magneto-responsive DE, and reusability without loss of activity even in four consequence cycles run for synthesis of pyrroles. This magnetic GS-based DE can be used as oil miscible additive, pollutant adsorbent, and carrier of biomaterials to targeted poisons.
Improved catalyst-free synthesis of pyrrole derivatives in aqueous media
Tamaddon, Fatemeh,Amirpoor, Farideh
, p. 1791 - 1794 (2013/09/12)
An improved catalyst-free, three-component reaction of ammonium acetate, 1,3-dicarbonyl compounds, and aromatic α-hydroxycarbonyl compounds has been carried out in water-ethanol (50:50) under reflux conditions. The improvement of yield in this aqueous med
A new three-component reaction catalyzed by silica sulfuric acid: Synthesis of tetrasubstituted pyrroles
Tamaddon, Fatemeh,Farahi, Mahnaz
, p. 1379 - 1383 (2012/07/28)
A novel, convenient, and efficient three-component reaction of benzoin derivatives, 1,3-dicarbonyls, and ammonium acetate in the presence of silica sulfuric acid (SSA) is described for the synthesis of 2,3,4,5-tetrasubstituted pyrroles under solvent-free
Molybdate sulfuric acid as a reusable solid catalyst in the synthesis of 2,3,4,5-tetrasubstituted pyrroles via a new one-pot [2+2+1] strategy
Tamaddon, Fatemeh,Farahi, Mahnaz,Karami, Bahador
experimental part, p. 85 - 89 (2012/04/17)
Molybdate sulfuric acid (MSA) has been found as an efficient and reusable solid acid catalyst for the synthesis of new 2,3,4,5-tetrasubstituted pyrroles via a novel [2+2+1] strategy. Thus, one-pot three-component reaction of benzoin derivatives, 1,3-dicar
