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  • Title: Synthesis of 1H-indazoles and 1H-pyrazoles via FeBr3/O2 mediated intramolecular C-H amination.
    Author: Zhang T, Bao W.
    Journal: J Org Chem; 2013 Feb 01; 78(3):1317-22. PubMed ID: 23297649.
    Abstract:
    A new synthesis of substituted 1H-indazoles and 1H-pyrazoles from arylhydrazones via FeBr(3)/O(2) mediated C-H activation/C-N bond formation reactions is reported. The corresponding 1,3-diaryl-substituted indazoles and trisubstituted pyrazoles were obtained in moderate to excellent yields under mild conditions.
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