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<p>An alternative synthesis was developed for the preparation of polytopic ligands, which combine both the NH-pyrazole and carboxyl moieties, based on polyfluoroalkylated lithium 1,3-diketonates bearing acetal groups. The proposed approach involves the transformation of diketonates into the corresponding acetylpyrazoles followed by the condensation with <i>p</i>-hydrazinobenzoic acid. The reaction of unsubstituted hydrazine with the condensation product of diketonate and 4-hydrazinobenzoic acid results in the transamination to form bis-pyrazoles bearing a hydrazone moiety, which does not contain an arylcarboxyl substituent.</p>

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Pyrazolylbenzoic acids based on polyfluoroalkylated lithium 1,3-diketonates bearing acetal groups

  • 期刊论文

  • 发表日期：

    2025年7月1日

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  • Yu. S. Kudyakova,
  • Yu. O. Edilova,
  • E. A. Osipova,
  • P. A. Slepukhin,
  • Ya. V. Burgart,
  • V. I. Saloutin,
  • D. N. Bazhin

摘要

An alternative synthesis was developed for the preparation of polytopic ligands, which combine both the NH-pyrazole and carboxyl moieties, based on polyfluoroalkylated lithium 1,3-diketonates bearing acetal groups. The proposed approach involves the transformation of diketonates into the corresponding acetylpyrazoles followed by the condensation with p-hydrazinobenzoic acid. The reaction of unsubstituted hydrazine with the condensation product of diketonate and 4-hydrazinobenzoic acid results in the transamination to form bis-pyrazoles bearing a hydrazone moiety, which does not contain an arylcarboxyl substituent.