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  • Title: A general and efficient approach to 2H-indazoles and 1H-pyrazoles through copper-catalyzed intramolecular N-N bond formation under mild conditions.
    Author: Hu J, Cheng Y, Yang Y, Rao Y.
    Journal: Chem Commun (Camb); 2011 Sep 28; 47(36):10133-5. PubMed ID: 21826369.
    Abstract:
    A new efficient copper-catalyzed intramolecular amination reaction has been developed to readily synthesise a wide variety of multi-substituted 2H-indazole and 1H-pyrazole derivatives from easily accessible starting materials under mild conditions. A highly selective ligand for estrogen receptor β was prepared in three steps by employing this method.
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