5427-89-4Relevant academic research and scientific papers
Ruthenium(II)-(Arene)-N-Heterocyclic Carbene Complexes: Efficient and Selective Catalysts for the N-Alkylation of Aromatic Amines with Alcohols
Kalo?lu, Nazan,Achard, Mathieu,Bruneau, Christian,?zdemir, ?smail
, p. 2598 - 2606 (2019/06/14)
A series of unsymmetrical 1,3-disubstituted benzimidazolium chlorides were synthesized as N-heterocyclic carbene (NHC) precursors. These compounds were used for synthesis of the new ruthenium(II) complexes of the type [RuCl2(arene)(NHC)], (arene = η6-p-cymene). The structures of all compounds were characterized by 1H NMR, 13C NMR and FT-IR spectroscopy techniques. The catalytic activity of the ruthenium complexes has been evaluated with respect to the mono-N-alkylation reactions of aromatic amines with various alcohol derivatives under solvent-free conditions at 120 °C using the borrowing hydrogen strategy.
Benzimidazolium sulfonate ligand precursors and application in ruthenium-catalyzed aromatic amine alkylation with alcohols
Kaloglu, Nazan,?zdemir, Ismail,Gürbüz, Nevin,Achard, Mathieu,Bruneau, Christian
, p. 33 - 38 (2015/11/17)
New benzimidazolium sulfonate salts have been prepared and fully characterized. They have been associated in situ with [RuCl2(p-cymene)]2 to generate efficient catalytic systems operating at 120 °C under neat conditions in the presence of potassium tert-butylate for selective N-alkylation of primary aromatic amines into secondary amines.
