Ruthenium(II)‐(p‐cymene)‐N‐Heterocyclic Carbene Complexes for the N‐Alkylation of Amine Using the Green Hydrogen Borrowing Methodology

Ruthenium(II)‐(p‐cymene)‐N‐Heterocyclic Carbene Complexes for the N‐Alkylation of Amine... Six ruthenium(II) complexes with the general molecular formula [RuCl2(NHC)(η6‐p‐cymene)] (NHC = N‐heterocyclic carbene) were synthesized by the transmetalation method from [RuCl2(η6‐p‐cymene)]2 and silver(I)‐NHC complexes. All complexes were fully characterized by analytical and spectral methods (FT‐IR, elemental analysis and 1H and 13C NMR). The solid‐state structure of one of the ruthenium complexes [dichloro‐{1‐[2‐(2‐ethoxyphenoxy)ethyl]‐3‐(3,5‐dimethylbenzyl)benzimidazol‐2‐ylidene}(p‐cymene) ruthenium(II)] has been established by single‐crystal X‐ray diffraction study, which revealed that the ruthenium atom adopt a classical piano‐stool coordination geometry. Under the optimised conditions, these ruthenium complexes were found to be efficient catalysts for N‐alkylation of aniline with arylmethyl alcohols using the hydrogen borrowing strategy, which is a cost‐effective and environmentally attractive reaction for the preparation of N‐alkylated amines. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png European Journal of Inorganic Chemistry Wiley

Ruthenium(II)‐(p‐cymene)‐N‐Heterocyclic Carbene Complexes for the N‐Alkylation of Amine Using the Green Hydrogen Borrowing Methodology

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Publisher
Wiley Subscription Services, Inc., A Wiley Company
Copyright
© 2018 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim
ISSN
1434-1948
eISSN
1099-0682
D.O.I.
10.1002/ejic.201701479
Publisher site
See Article on Publisher Site

Abstract

Six ruthenium(II) complexes with the general molecular formula [RuCl2(NHC)(η6‐p‐cymene)] (NHC = N‐heterocyclic carbene) were synthesized by the transmetalation method from [RuCl2(η6‐p‐cymene)]2 and silver(I)‐NHC complexes. All complexes were fully characterized by analytical and spectral methods (FT‐IR, elemental analysis and 1H and 13C NMR). The solid‐state structure of one of the ruthenium complexes [dichloro‐{1‐[2‐(2‐ethoxyphenoxy)ethyl]‐3‐(3,5‐dimethylbenzyl)benzimidazol‐2‐ylidene}(p‐cymene) ruthenium(II)] has been established by single‐crystal X‐ray diffraction study, which revealed that the ruthenium atom adopt a classical piano‐stool coordination geometry. Under the optimised conditions, these ruthenium complexes were found to be efficient catalysts for N‐alkylation of aniline with arylmethyl alcohols using the hydrogen borrowing strategy, which is a cost‐effective and environmentally attractive reaction for the preparation of N‐alkylated amines.

Journal

European Journal of Inorganic ChemistryWiley

Published: Jan 14, 2018

Keywords: ; ; ; ;

References

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