Nawaz, ZahidGurbuz, NevinZafar, Muhammed naveedOzdemir, NamikCetinkaya, BekirOzdemir, Ismail2024-08-042024-08-0420231300-0527https://doi.org/10.55730/1300-0527.3606https://search.trdizin.gov.tr/yayin/detay/1208488https://hdl.handle.net/11616/92753A low temperature hydrogen borrowing approach to generate secondary amines using benzimidazole-based N-heterocyclic carbene (BNHC) ruthenium complexes is reported. A series of the piano-stool complexes of the type [(eta 6-p-cymene)(BNHC)RuCl2] (1a-g) were synthesized via one-pot reaction of the NHC salt precursor, Ag2O, and [RuCl2(p-cymene)]2 and characterized using con-ventional spectroscopic techniques. The geometry of two precursors, [(eta 6-p-cymene)(Me4BnMe2BNHCCH2OxMe)RuCl2] (1f) and [(eta 6-p-cymene)(Me5BnMe2BNHCCH2OxMe)RuCl2] (1g), was studied by single crystal X-ray diffraction. These catalysts were found to dehydrogenate alcohols efficiently at temperatures as low as 50 degrees C to allow Schiff-base condensation and subsequent imine hydrogenation to afford secondary amines. Notably, this ruthenium-based procedure enables the N-alkylation of aromatic and heteroaromatic primary amines with a wide range of primary alcohols in excellent yields of up to 98%. The present methodology is green and water is liberated as the sole byproduct.eninfo:eu-repo/semantics/openAccessBenzimidazol-2-ylidenesruthenium complexesamine alkylationC-N bond formationmild conditionsArticle4751209+3817374610.55730/1300-0527.36062-s2.0-85176256310Q31208488WOS:001099801900025Q3