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Ruthenium(II)‐(Arene)‐N‐Heterocyclic Carbene Complexes: Efficient and Selective Catalysts for the N ‐Alkylation of Aromatic Amines with Alcohols
Author(s) -
Kaloğlu Nazan,
Achard Mathieu,
Bruneau Christian,
Özdemir İsmail
Publication year - 2019
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201900191
Subject(s) - ruthenium , carbene , chemistry , alkylation , catalysis , medicinal chemistry , solvent , acetonitrile , alcohol , nuclear magnetic resonance spectroscopy , organic chemistry , combinatorial chemistry
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 [RuCl 2 (arene)(NHC)], (arene = η 6 ‐ p ‐cymene). The structures of all compounds were characterized by 1 H NMR, 13 C 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.