• HESHMATOLLAH ALINEZHAD

      Articles written in Journal of Chemical Sciences

    • Green and expeditious synthesis of 1,8-dioxodecahydroacridine derivatives catalysed by protic pyridinium ionic liquid

      Heshmatollah Alinezhad Mahmood Tajbakhsh Mohammad Norouzi Saeed Baghery Jamshid Rakhtshah

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      The Hantzsch three-component condensation reaction of various aromatic aldehydes, 1,3-dione and aniline derivatives in the presence of 2-methylpyridinium trifluoromethanesulphonate ([2-MPyH]OTf) as green and highly efficient catalysts in water affords 1,8-dioxodecahydroacridine derivatives in good to excellent yields. This reaction has been carried out in the presence of 1 mol% of [2-MPyH]OTf at room temperature. The described novel synthesis method proposes several advantages of mild condition, short reaction times, high yields, simplicity and easy workup compared to the traditional method of synthesis.

    • Application of SiO2 nanoparticles as an efficient catalyst to develop syntheses of perimidines and tetraketones

      HESHMATOLLAH ALINEZHAD ARMIN AHMADI PARVIN HAJIABBASI

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      In this paper, we explore the catalytic activity of SiO2 nanoparticles (NPs) as an eco-friendly, efficient and reusable catalyst in the synthesis of 2,3-dihydro-1H-perimidines as well as tetraketones. For tetraketones syntheses, a simple tandem Knoevenagel condensation following Michael addition procedure is performed by the reaction between benzaldehydes and 5,5-dimethyl-1,3-cyclohexanediones under solvent-free condition using SiO2 NPs as an efficient solid catalyst. In addition, for 2,3-dihydro-1H-perimidines syntheses, cyclocondensation of various aldehydes with 1,8-diaminonaphthalene is achieved under solvent-free condition using SiO2 NPs as a catalyst at room temperature. The results showed catalytic enhancement in both synthetic procedures.In this work,4-(2,3-dihydro-1H-perimidin-2-yl)benzonitrileand2-(pyridin-4-yl)-2,3-dihydro-1Hperimidine are synthesized as new compounds. Also, reusability study of SiO2 NPs was done to ensure its applicability as a recycled catalyst in this work.

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