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Synthesis 1978; 1978(9): 633-648
DOI: 10.1055/s-1978-24840
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Synthesis, Properties, and Reactions of 1H-Indazol-3-ols and 1,2-Dihydro-3H-indazol-3-ones

Leandro BAIOCCHI* , Giorgio CORSI, Giuseppe PALAZZO
  • *Department of Chemistry, F. Angelini Research Institute, Viale Amelia 70, I-00181 Rome, Italy
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Publication Date:
12 September 2002 (online)

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This article presents a comprehensive review of the methods of synthesis, the main reactions, and the chemical, physical, and physiological properties of 1H-indazol-3-ols (termed indazolols in this article for simplicity) and the tautomeric 1,2-dihydro-3H-indazol-3-ones (termed indazolones). Emphasis is placed on spectroscopic evidence for the structures assigned to the products. 1. Introduction 2. Nomenclature 3. Indazolols Unsubstituted in the Heterocyclic Ring 4. 1-Substituted Indazolols 5. 2-Substituted Indazolones 6. 1-Alkyl-3-alkoxyindazoles and 1,2-Disubstituted Indazolones 7. Reaction of Indazolol with Ethyl Chloroacetate 8. Acylindazolols and Acylindazolones 9. Physiological Properties of Indazolone Derivatives