Articles written in Journal of Chemical Sciences
Volume 125 Issue 6 November 2013 pp 1517-1522 Regular Articles
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.
Volume 131 Issue 4 April 2019 Article ID 0034
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.
Volume 134, 2022
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