Yu, Jiatao Xia, Yonggen Lu, Ming Iron-Catalyzed Highly Efficient Aerobic Oxidative Synthesis of Benzimidazoles, Benzoxazoles, and Benzothiazoles Directly from Aromatic Primary Amines Under Solvent-Free Conditions in the Open Air <div><p></p><p>Solvent-free oxidative synthesis of benzimidazoles, benzoxazoles, and benzothiazoles from aromatic primary amines and <i>o</i>-phenylenediamine, <i>o</i>-aminophenol, and <i>o</i>-aminothiophenol has been achieved by using Fe(NO<sub>3</sub>)<sub>3</sub> and TEMPO (2,2,6,6-tetramethyl-1-piperidinyloxyl). This reaction can use air as an economical and green oxidant, and a wide variety of derivatives were obtained in good to excellent yields. The reaction mechanism was proposed and this method provides a direct, practical, and efficient approach for the preparation of substituted benzimidazoles, benzoxazoles, and benzothiazoles.</p> </div> iron-catalyzed;aerobic;oxidative;synthesis;benzothiazoles;aromatic;amines;solvent-free 2014-08-25
    https://tandf.figshare.com/articles/journal_contribution/Iron_Catalyzed_Highly_Efficient_Aerobic_Oxidative_Synthesis_of_Benzimidazoles_Benzoxazoles_and_Benzothiazoles_Directly_from_Aromatic_Primary_Amines_Under_Solvent_Free_Conditions_in_the_Open_Air/1050557
10.6084/m9.figshare.1050557.v3