92246-47-4Relevant academic research and scientific papers
Quinoline-2-carboimine copper complex immobilized on amine functionalized silica coated magnetite nanoparticles: A novel and magnetically retrievable catalyst for the synthesis of carbamates via C-H activation of formamides
Sharma,Dutta, Sriparna,Sharma, Shivani
, p. 1303 - 1316 (2015)
In the present study, we report the synthesis of a highly efficient and magnetically retrievable catalytic system (Cu-2QC@Am-SiO2@Fe3O4) through the covalent immobilization of quinoline-2-carboxaldehyde (2QC) on an amine functionalized silica coated ferrite nanosupport followed by metallation with copper acetate. The structure of the organic-inorganic hybrid nanomaterial has been confirmed using various physicochemical techniques such as Powder X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FT-IR), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Energy Dispersive X-Ray Spectroscopy (EDS), Energy Dispersive X-Ray Fluorescence Spectroscopy (ED-XRF), Atomic Absorption Spectroscopy (AAS), Inductively Coupled Plasma Spectroscopy (ICP) and Vibrating Sample Magnetometry (VSM). The resulting nanocatalyst exhibits a remarkable catalytic efficacy in the synthesis of industrially and pharmaceutically significant carbamates via the C-H activation of formamides under solvent free conditions. The most important attribute of the present methodology is that the catalyst can be recovered simply through an external magnetic force and reused several times without any significant deterioration in its activity. Furthermore, the heterogeneity test has been carried out in order to ensure the intrinsic stability of the nanostructured catalyst. The activity of the Cu-2QC@Am-SiO2@Fe3O4 nanocatalyst has been found to be far more superior in comparison with the literature precedents in terms of the product yield, cost and reusability of the catalyst. Besides, ambient reaction conditions, simple workup procedure, wide substrate scope and cost effectiveness are some of the other outstanding features of this protocol that make it economical and sustainable.
Oxidative Coupling of Dimethylformamide with β-Dicarbonyl Compounds Using γ-Fe2O3?CuO Nanoparticles
Feizi, N.,Hassani, H.,Toosi, F. Shaghayeghi
, p. 1654 - 1659 (2020/10/22)
Abstract: Maghemite–copper oxide nanocomposite catalyzed oxidative coupling of formamides with β-dicarbonyl compounds in the presence of tert-butyl hydroperoxide as an oxidant to produce the corresponding enol carbamates in excellent yields (up to 92%) under the optimized conditions. The simple preparation and the ability to be recycled and magnetically separated are salient features of this catalytic system.
Nickel-catalyzed oxidative esterification of formamides with 1,3-dicarbonyl compounds under mild reaction conditions
Saberi, Dariush,Poorsadeghi, Samira
, (2017/09/30)
Synthesis of enol carbamates was achieved via nickel-catalyzed oxidative coupling of formamides with 1,3-dicarbonyl compounds in the presence of tert-butyl hydroperoxide at 40?°C. Various derivatives of enol carbamates were synthesized by this method in good to excellent yields.
Oxidative coupling of formamides with β-dicarbonyl compounds and the synthesis of 2-aminobenzothiazole using Cu(II)-functionalized Fe3O4 nanoparticles This article is dedicated to memory of Mostafa Chamran.
Azizi, Kobra,Karimi, Meghdad,Heydari, Akbar
, p. 812 - 816 (2015/02/19)
The Fe3O4@EDTA-Cu(II) nanoparticles catalyzed oxidative coupling of formamides with β-dicarbonyl compounds is developed using tert-butyl hydroperoxide as an oxidant. In general, the enol carbamates are synthesized in excellent yields (up to 92%) under the optimized reaction conditions. Fe3O4@EDTA-Cu(II) has the advantage of being magnetically recoverable. Also, we have established a highly efficient Fe3O4@EDTA-Cu(II)-catalyzed tandem reaction of 2-iodoanilines with isothiocyanates for the synthesis of 2-aminobenzothiazoles.
Anchoring of a Copper(II)-Schiff Base Complex onto Silica-Coated Ferrite Nanoparticles: A Magnetically Separable Catalyst for Oxidative C-O Coupling by Direct C(sp2)-H and C(sp3)-H Bond Activation
Ghanbaripour, Rashid,Samadizadeh, Marjaneh,Honarpisheh, Golnaz,Abdolmohammadi, Majid
, p. 2117 - 2120 (2015/09/15)
A novel catalyst consisting of a Schiff base-copper complex on surface-modified silica-coated ferrite nanoparticles was been prepared and used for oxidative C-O cross-coupling reactions of 1,3-dicarbonyl compounds with formamides for the synthesis of enol
