Novel N-Alkylbenzimidazole-Ruthenium (II) complexes: Synthesis and catalytic activity of N-alkylating reaction under solvent-free medium


ŞAHİN N., ÖZDEMİR N., GÜRBÜZ N., ÖZDEMİR İ.

APPLIED ORGANOMETALLIC CHEMISTRY, vol.33, no.2, 2019 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 33 Issue: 2
  • Publication Date: 2019
  • Doi Number: 10.1002/aoc.4704
  • Journal Name: APPLIED ORGANOMETALLIC CHEMISTRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Keywords: catalysis, crystal structure, N-alkylation, N-coordinated benzimidazole, ruthenium, CAMBRIDGE STRUCTURAL DATABASE, REDUCTIVE AMINATION, PINCER COMPLEXES, AROMATIC-AMINES, HYDROAMINATION, ALCOHOLS, ALDEHYDES, EFFICIENT, LIGANDS, ALKENES
  • Inonu University Affiliated: Yes

Abstract

In this article, direct N-alkylation reactions of amines with alcohols derivatives have been investigated. For this purpose, a new series ruthenium (II) complexes bearing N-coordinated benzimidazole complexes with have been synthesized and fully characterized by elemental analysis, FT-IR, H-1 NMR and, C-13 NMR spectroscopies. Additionally, the structures of the complexes 2b and 2c have been confirmed by X-ray crystallography. Although the N-alkylating reaction is usually performed in toluene, the catalytic study of complexes 2a-d has carried out no additional solvent and alcohol acted both as solvent and reactant of alkylating by using a little excess of alcohols. Surprisingly, conversion and selectivity of amine product for alkylation reaction have been seen high in medium solvent-free relative to in toluene.