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Relevant academic research and scientific papers

Magnetic ZnO?CuO?Iron ore nanocomposites as a green and highly efficient heterogeneous nanocatalyst for solventless synthesis of α-aminophosphonates

A green novel synthesis of ZnO?CuO?Iron ore nanocomposites as a novel and magnetic heterogeneous nanocatalyst is used for the one-pot synthesis of α-aminophosphonates under solventless conditions. This study benefits from the magnetic iron ore acting as a multi-mineral Lewis acid system, the green properties and the large surface area due to its nanostructure. Moreover, scanning electron microscope analysis confirmed that the nanocatalyst gave an excellent yield and good recyclability; which, even after the 10th cycle of the model reaction retained its potential with no significant loss of catalytic activity.

Magnetic BaFe12O19/Al2O3: An Efficient Heterogeneous Lewis Acid Catalyst for the Synthesis of α-Aminophosphonates (Kabachnik–Fields Reaction)

Abstract: The design and application of environmentally friendly catalysts to reduce the quantity of toxic wastes is critical for improving?the chemical synthesis process. Therefore, BaFe12O19/Al2O3, a magnetic mesoporous nanocomposites, were designed synthesized and characterized using different techniques such as energy dispersive X-ray (EDX) spectroscopy, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FESEM), Brunauer–Emmett–Teller?(BET) adsorption method, and vibrating sample magnetometry (VSM). The prepared BaFe12O19/Al2O3 display a high surface area (1773.22?m2/g) with an average pore diameter of 3.946?nm from nitrogen sorption analysis. In addition, the synthesized nanocomposites prove to be an active heterogeneous Lewis acid catalyst for the solvent free synthesis of α-aminophosphonates at ambient temperature, through three-component reaction of aldehydes/ketones, amines and triethyl phosphite. The use of this catalyst results in an effortless magnetic recoverability and recyclability, high yield and short reaction time under solvent-free conditions. Graphic Abstract: [Figure not available: see fulltext.].

Synthesis of α-aminophosphonates using carbon nanotube supported imidazolium salt-based ionic liquid as a novel and environmentally benign catalyst

A supported acidic catalyst was easily prepared via anchoring imidazolium salt-based ionic liquid onto multiwalled carbon nanotube by covalent bonds. This novel immobilized acidic ionic liquid effectively catalyzed the one-pot synthesis of α-aminophosphonates from the reaction of amines and aldehydes with diethyl phosphite. The catalyst can be easily recovered and reused without appreciable change in its efficiency.

Air-stable zirconocene bis(perfluorobutanesulfonate) as a highly efficient catalyst for synthesis of α-aminophosphonates via Kabachnik-Fields reaction under solvent-free condition

Zirconocene bis(perfluorobutanesulfonate) [Cp2Zr(OSO 2C4F9)2·2H2O] was successfully synthesized by treatment of Cp2ZrCl2 with C4F9SO3Ag, and was found to have the nature of air-stability, water tolerance, high thermal stability and strong Lewis acidity. This complex showed high catalytic efficiency for the synthesis of α-aminophosphonates via Kabachnik-Fields reaction of aldehydes/ketones, amines and diethyl phosphite under mild and solvent-free conditions. Furthermore, it can be reused without loss of activity in a test of five cycles. Compared with our previously reported complex of Cp2Zr(OSO 2C8F17)2·3H 2O·THF, this complex showed better catalytic activity.

TfOH/C-catalyzed one-pot three-component synthesis of α-amino phosphonates under solvent-free conditions

The TfOH/C was readily prepared via simple absorption of triflic acid onto activated charcoal. This solid acid was used as an efficient catalyst for the synthesis of α-aminophosphonates through the Kabachnik-Fields reaction of carbonyl compound, amine and

Iron-doped single walled carbon nanotubes as an efficient and reusable heterogeneous catalyst for the synthesis of organophosphorus compounds under solvent-free conditions

Iron-doped single walled carbon nanotubes (Fe/SWCNTs) is an efficient, eco-friendly, and reusable heterogeneous catalyst for the synthesis of diversely decorated α-aminophosphonates via multicomponent reaction of amines, carbonyl compounds, and phosphorus compounds under solvent-free conditions. This methodology illustrates a very simple procedure, with wide applicability, extending the scope to aliphatic and aromatic amines and carbonyl compounds. It also enabled the development of one-pot synthesis of β-phosphonomalonates during the reaction of carbonyl compounds, malononitrile and phosphorus compounds. Excellent results were obtained in each case affording the corresponding organophosphorus adducts in good yields.

Tween-20: An efficient catalyst for one-pot synthesis of α-aminophosphonates in aqueous media

A green one-pot three-component synthesis has been developed for α-aminophosphonates by condensation of aldehydes, amines, and diethylphosphite by using nonionic surfactant Tween-20 as catalyst in aqueous media. The results showed that this synthetic rout

Thiamine hydrochloride (VB1): An efficient catalyst for one-pot synthesis of α-aminophosphonates under ultrasonic irradiation

An efficient synthesis of novel α-aminophosphonates by the reaction of aldehydes and amines with triethyl phosphite in the presence of the easily available, inexpensive, and nontoxic catalyst thiamine hydrochloride (VB1). This method affords the α-aminophosphonates under the influence of ultrasound irradiation in aqueous medium, in short reaction times (4-6 min), high yields (85-95%), with improved purity. The process is green, mild, inexpensive and excellent yields are the main compensation of this procedure.

NbCl5: An efficient catalyst for one-pot synthesis of α-aminophosphonates under solvent-free conditions

NbCl5 has been found to be a very effective catalyst for the synthesis of a variety of α-aminophosphonates through the Kabachnik-Fields reaction of carbonyl compound, amine and diethyl phosphite under solvent-free conditions. Copyright

Synthesis of α-aminophosphonates using polystyrene supported Al(OTf)3 as a heterogeneous catalyst

A mild and efficient method has been devised for the preparation of -aminophosphonates from three component condensation of an aldehyde, an amine, and diethyl phosphite in the presence of catalytic amounts of cross-linked polystyrene supported aluminium triflate (Ps-Al(OTf)3) under solvent-free conditions in good to excellent yields. The catalyst is stable (as a bench top catalyst) and can be easily recovered and reused without appreciable change in its efficiency. Taylor & Francis Group, LLC.