Aerobic oxidation of amines to imines catalyzed by a ruthenium complex under solvent-free conditions
•[Et3NH]2[Ru(dipic)Cl3] showed high efficiency in aerobic oxidation of amines to imines.•The imines can be obtained in high yield under air and solvent-free conditions.•This protocol is an atom-economical green process and tolerates various substrates.•[Et3NH]2[Ru(dipic)Cl3] is readily available.
A ruthenium complex [Et3NH]2[Ru(dipic)Cl3] showed high efficiency in the homo-coupling of primary amines and cross-coupling of benzylamine with anilines and aliphatic amines to the corresponding imines under air and solvent-free conditions. This protocol is an atom-economical green process and tolerates various substrates bearing both electron-donating and electron-withdrawing substituents.
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Journal: Catalysis Communications - Volume 81, 5 June 2016, Pages 10–13