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New 1H-1-alkyl-6-methyl-3-phenyl-7-phenylazo-pyrazolo[5,1-c][1,2,4]triazoles through regioselective alkylation of 1H-6-methyl-3-phenyl-7-phenylazopyrazolo[5,1-c][1,2,4]triazoles

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Central European Journal of Chemistry

Abstract

1H-1-Alkyl-6-methyl-3-phenyl-7-phenylazopyrazolo[5,1-c][1,2,4]triazoles (2aa-ad) were obtained by regioselective alkylation of 1H-6-methyl-3-phenyl-7-phenylazopyrazolo[5,1-c][1,2,4]triazoles (2a). 1H-1-Alkyl-6-methyl-3-phenyl-7-phenylazopyrazolo[5,1-c][1,2,4]triazoles 2aa and 2ab were also prepared by coupling phenyldiazonium chloride with 1H-1-alkyl-6-methyl-3-phenyl-pyrazolo[5,1-c][1,2,4]triazoles 1aa and 1ab. The new compounds were characterized by IR, UV-VIS, 1H-NMR, 13C-NMR, and 15N-NMR spectroscopy and their structures and actual tautomeric forms were established unequivocally.

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Authors and Affiliations

  1. Department of Applied Chemistry and Engineering of Organic and Natural Compounds, Faculty of Industrial Chemistry and Environmental Engineering, “Politehnica” University Timişoara, RO-300001, Timişoara, Romania

    Vasile-Nicolae Bercean & Valentin Badea

  2. “Petru Poni” Institute of Macromolecular Chemistry of the Romanian Academy, RO-700487, Iaşi, Romania

    Călin Deleanu & Alina Nicolescu

  3. “Costin D. Nenitescu” Centre of Organic Chemistry of the Romanian Academy, RO-060023, Bucharest, Romania

    Călin Deleanu & Alina Nicolescu

Authors
  1. Vasile-Nicolae Bercean
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  2. Valentin Badea
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  3. Călin Deleanu
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  4. Alina Nicolescu
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Correspondence to Valentin Badea.

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Bercean, VN., Badea, V., Deleanu, C. et al. New 1H-1-alkyl-6-methyl-3-phenyl-7-phenylazo-pyrazolo[5,1-c][1,2,4]triazoles through regioselective alkylation of 1H-6-methyl-3-phenyl-7-phenylazopyrazolo[5,1-c][1,2,4]triazoles. cent.eur.j.chem. 10, 373–379 (2012). https://doi.org/10.2478/s11532-011-0151-2

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  • DOI: https://doi.org/10.2478/s11532-011-0151-2

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