In this study a new, economical and green method was reported for the synthesis of Ag/CdO/ZnO@MWCNTs nanocomposites (Ag/CdO/ZnO@MWCNTs NCs) as a new heterogeneous catalyst. For confirming the structure of synthesized nanocatalyst, XRD, FESEM, EDX, and TEM analyses were utilized. The Ag/CdO/ZnO@MWCNTs NCs as a high performance catalyst were employed for the preparation of a new family of substituted dihydropyrroloazepines using the one‐pot condensation reactions of isatin, ammonium acetate, α‐haloketones, and activated acetylenic compounds in water at room temperature. Another work in this research is investigation of antioxidant property of some synthesized compounds by diphenyl‐picrylhydrazine (DPPH) radical trapping experiment. Presently, bacteria that are not destroyed with drug have generated many problems in the performance of many transferable disease. For this reason, discovering appropriate and new procedures for the dealing with these pathogens is important, and recent study has focused on the investigation of the antibacterial effects on the prepared compounds.

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In this work, synthesis of pyrido[2,1-a]isoquinolines and pyrido[1,2-a]quinolins in excellent yield using multicomponent reaction of phthalaldehyde, methyl amine, methyl malonyl chloride, alkyl bromides, and triphenylphosphine in the presence of catalytic amount of Fe 3 O 4 -MNPs with aqueous sodium hydroxide at 80°C was investigated. The reduction of ferric chloride solution with Clover Leaf water extract caused to synthesis of magnetic iron oxide nanoparticles (Fe 3 O 4 -MNPs) as a green method. As well, antioxidant activity was studied for the some newly synthesized compounds such as 6a, 6c, 9b, and 9c using the DPPH radical trapping and reducing of ferric ion experiments and comparing results with synthetic antioxidants (TBHQ and BHT). As a result, compounds 6a, 6c, 9b, and 9c show good DPPH radical trapping and excellent reducing strength of ferric ion.

Aims & Objective: In this work, multicomponent reaction of aldehydes, benzoylisothiocyanate and alkyl bromides in the presence of ammonium acetate, sodium cyanide and catalytic amount of KF/Clinoptilolite nanoparticles (KF/CP NPs) in water at 100oC was investigated. Materials and Methods: In these reactions, thiazole derivatives produce in good to excellent yields and short time. Also, antioxidant activity was studied for the some newly synthesized compounds using the DPPH radical trapping and reducing of ferric ion experiments and comparing results with synthetic antioxidants (TBHQ and BHT). Results: As a result, compounds 4b show excellent DPPH radical trapping and reducing strength of ferric ion. These compounds have biological potential because of thiazole core. For this reason, the antimicrobial activity of some synthesized compounds was studied by employing the disk diffusion test on Gram-positive bacteria and Gram-negative bacteria. Conclusion: The results of disk diffusion test showed that these compounds prevented the bacterial growth.