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2-Methylpyridinium/pyridinium 5-(2,4-dinitrophenyl)-2,6-dioxo-1,2,3,6-tetrahydropyrimidin-4-olates as potent anticonvulsant agents—synthesis and crystal structure

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Abstract

The molecular salt, 2-methylpyridinium 5-(2,4-dinitrophenyl)-2,6-dioxo-1,2,3,6-tetrahydropy-rimidin-4-olate) (I), is prepared from the ethanolic solution of 1-chloro-2,4-dinitrobenzene, pyrimidine-2,4,6-(1H,3H,5H)-trione (barbituric acid) and 2-methylpyridine at room temperature, and the molecular salt, pyridinium 5-(2,4-dinitrophenyl)-2,6-dioxo-1,2,3,6-tetrahydropyrimidin-4-olate (II), is prepared from the same reactants, by dissolving them in hot DMSO and ethanol mixture at 70°C. The structures of I and II are characterized by visible, IR, 1H-NMR, 13C-NMR and elemental analysis and confirmed by single crystal X-ray analysis. Both the salts crystallize in triclinic crystal system with sp. gr. \(P\bar 1\). They possess noticeable anticonvulsant activity even at low concentration (25 mg/kg). Acute toxicity studies of these complexes indicate that LD50 values are greater than 1500 mg/kg and the tested animals do not show any behavioural changes.

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Authors and Affiliations

  1. Post Graduate & Research Department of Chemistry, Seethalakshmi Ramaswami College, Tiruchirappalli-620 002, Affiliated to Bharathidasan University, Tamil Nadu, India

    G. Mangaiyarkarasi & D. Kalaivani

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  1. G. Mangaiyarkarasi
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  2. D. Kalaivani
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Correspondence to D. Kalaivani.

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Mangaiyarkarasi, G., Kalaivani, D. 2-Methylpyridinium/pyridinium 5-(2,4-dinitrophenyl)-2,6-dioxo-1,2,3,6-tetrahydropyrimidin-4-olates as potent anticonvulsant agents—synthesis and crystal structure. Crystallogr. Rep. 58, 1096–1102 (2013). https://doi.org/10.1134/S1063774513080075

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