Half-sandwich ruthenium-carbene catalysts: Synthesis, characterization, and catalytic application in the N-alkylation of amines with alcohols

KALOĞLU M.

INORGANICA CHIMICA ACTA, cilt.498, 2019 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 498
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1016/j.ica.2019.119163
  • Dergi Adı: INORGANICA CHIMICA ACTA
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Anahtar Kelimeler: N-Heterocyclic carbene, Ruthenium, N-Alkylation of amines, Hydrogen-borrowing process, BORROWING HYDROGEN, HETEROCYCLIC CARBENE, TERTIARY-AMINES, BOND ACTIVATION, AMIDE SYNTHESIS, AMINATION, COMPLEXES, EFFICIENT, IRIDIUM, SULFONAMIDES
  • İnönü Üniversitesi Adresli: Evet

Özet

In this study, the synthesis and characterization of new half-sandwich ruthenium complexes containing oxygen functionalised N-aryl and N-alkyl benzimidazol-2-ylidene ligands have been reported. All ruthenium complexes were tested as catalysts for a wide range of substrates in the N-alkylation of secondary cyclic amines such as pyrrolidine and piperidine, and 4-methylaniline which was a primary aromatic amine with alcohols by hydrogen-borrowing process. The catalytic reactions were performed with 1 mol% catalyst loading at 120 degrees C, 16 h under solvent-free conditions. All ruthenium complexes showed excellent catalytic activity, and N-alkylated products were obtained selectively.