A SO3H-functionalized epoxy-immobilized Fe3O4 core–shell magnetic nanocatalyst was prepared through a simple three-step procedure, and it identified by various analyses such as Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), differential thermal gravity (DTG), Brunauer–Emmett–Teller (BET) analysis, transmission (TEM), energy-dispersive X-ray spectroscopy (ED...

Abstract An efficient and environmentally benign synthesis of a new class acridinedione embedded spirooxindolo/acenaphthenothiopyrrolizidines spirooxindolo/acenathenoindolizidines has been synthesized in good to excellent yields employing ionic liquid accelerated one-pot [3 + 2]-cycloaddition strategy. The pre-requisite starting substrates, O -acryloyl acridinediones were prepared from dimedone...

Silica-bonded n-propyltriethylene-tetramine (SBNPTT) was found as an efficient solid base for the synthesis of 2-amino-5-oxo-5,6,7,8-tetrahydro-4H-chromenes. Chromene derivatives were obtained via the three-component condensation reaction of aromatic aldehydes, malononitrile, and dimedone at 80 oC under solvent-free conditions. The heterogeneous solid base showed much the same efficiency when u...

A green and convenient méthode for the synthesis of  a variety of xanthene derivatives by condensation reaction between aldehydes and β-naphthol or dimedone in an micellar solution of sodium dodecylphosphonate is described. This method offers several advantages, such as using of a cheap and environmentally benign reaction media, low loadings of sodium dodecylphosphonate as catalyst and...

Abstract Background The nano-sized particles enhance the exposed surface area of active part catalyst, thereby increasing contact between precursors and catalyst considerably. In this study, nano-SiO 2 /1,5-diazabicyclo[4.3.0]non-5-en was synthesized, characterized used as a heterogeneous nanocatalyst for synthesis tetrahydrobenzo[ b ]pyran derivatives. Fourier Transform Infrared Spectroscopy, ...

A new one-pot, efficient three-component condensation of dimedone, urazole and aromatic aldehydes in the presence of silica supported sodium hydrogen sulfate as an effective heterogeneous catalyst for the synthesis of novel Triazolo[1,2-a]indazole-1,3,8-trione derivatives under solvent-free conditions is described.

Silica-bonded n-propyltriethylene-tetramine (SBNPTT) was found as an efficient solid base for the synthesis of 2-amino-5-oxo-5,6,7,8-tetrahydro-4H-chromenes. Chromene derivatives were obtained via the three-component condensation reaction of aromatic aldehydes, malononitrile, and dimedone at 80 oC under solvent-free conditions. The heterogeneous solid base showed much the same efficiency when u...

A new and improved protocol for the synthesis, in good to excellent yields, of acridine-1,8(2H,5H)-diones is described, involving a one-pot, three component reaction of dimedone, arylglyoxals, and ammonium acetate in water under microwave irradiation.  

The Knoevenagel condensation of aromatic aldehydes with barbituric acid, dimedone and malononitrile occurred in the presence of BF3/nano-γ-Al2O3 at room temperature in ethanol. This catalyst is characterized by powder X-ray diffraction (XRD), fourier transform infrared spectroscopy (FT-IR), thermal gravimetric analysis (TGA), field emission scanning electron microscopy (FESEM) and energy-disper...