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Abstract: Poly and mono sulfonamide ligands were successfully used for the stabilization of palladium nanoparticles. The prepared nano catalysts that appeared to be heterogeneous and novel were characterized with various [...]

Abstract: In this study, a rapid and convenient synthesis of quinolines was developed. The reaction involves a one-pot synthesis of pyranoquinoline derivatives from aldehyde, malonitrile, and 8-hydroxyquinoline using DABCO as [...]

In this paper, hexamethylenetetramine‐functionalized magnetic Fe3O4 nanoparticles (Fe3O4@SiO2@Propyl‐HMTA) catalyst was prepared and utilized for the synthesis of 4‐aryl‐NH‐1,2,3‐triazole derivatives. Also, the interaction between aldehyde, nitromethane, and sodium azide was investigated within the synthesis route. Henry Reaction between the aldehyde and nitromethane created an intermediate that was immediately attacked by N3−. As a result of this attack, 4‐aryl‐NH‐1,2,3‐triazole was generated through an in situ [3 + 2] cycloaddition. One of the commonly used methods to synthesize of 4‐aryl‐NH‐1,2,3‐triazoles is the three‐component reaction among aldehyde, nitro methane and sodium azide. The selection of suitable catalyst for developing of this reaction is a key point in the synthesis of these compounds. The main advantages of this work are easy reaction work‐up, short reaction time, high yield and easy recyclability and reusability of the catalyst. [ABSTRACT FROM AUTHOR]

Abstract: We, herein, describe a novel, simple, efficient and one‐pot multi‐component procedure for the synthesis of substituted pyrimido[4,5‐d]pyrimidines via reaction of N,N‐dimethyl‐6‐amino uracil, isothiocyanate and aromatic aldehydes promoted by 7‐aminonaphthalene‐1,3‐disulfonic acid (ANDSA)‐functionalized magnetic Fe3O4@SiO2 in water as solvent and without using any other harmful organic reagents. Compared with other reactions, using these organic–inorganic hybrid heterogeneous catalysts can help us to achieve a green procedure, high catalytic activity, easy recovery with an external magnetic field, and short reaction times. [ABSTRACT FROM AUTHOR]

In this paper, a mild and green protocol has been developed for the synthesis of quinazoline derivatives. The catalytic activity of 7‐aminonaphthalene‐1,3‐disulfonic acid‐functionalized magnetic Fe3O4 nanoparticles (Fe3O4@SiO2@Propyl–ANDSA) was investigated in the one‐pot synthesis of new derivatives of tetrahydrotetrazolo[1,5‐a]quinazolines and tetrahydrobenzo[h]tetrazolo[5,1‐b]quinazolines from the reaction of aldehydes, 5‐aminotetrazole, and dimedone or 6‐methoxy‐3,4‐dihyronaphtalen‐1(2H)‐one at 100 °C in H2O/EtOH as the solvent. The catalyst was characterized before and after the organic reaction. Fe3O4@SiO2@Propyl–ANDSA showed remarkable advantages in comparison with previous methods. Advantages of the method presented here include easy purification, reusability of the catalyst, green and mild procedure, and synthesis of new derivatives in high yields within short reaction time. [ABSTRACT FROM AUTHOR]

7-Aminonaphthalene-1,3-disulfonic acid-functionalized magnetic Fe3O4 nanoparticles efficiently catalyse the one-pot multi-component synthesis of substituted 3-pyrrolin-2-ones without using any other harmful organic reagents. High catalytic activity, ease of recovery, use of an external magnetic field and capability of being reused many times without significant loss of its catalytic activity are additional eco-friendly properties of this catalytic system. Compared to other methods, our protocol has various advantages such as short reaction times, low catalyst loading, high yields, easy magnetic separation and reusability of the catalyst. [ABSTRACT FROM AUTHOR]