Design, synthesis, characterization of novel ruthenium(II) catalysts: highly efficient and selective hydrogenation of cinnamaldehyde to (E)-3-phenylprop-2-en-1-ol

Molecules. 2014 May 9;19(5):5965-80. doi: 10.3390/molecules19055965.

Abstract

In this contribution, two novel supported and non-supported ruthenium(II) complexes of type [RuCl2(dppme)(NN)] where [dppme is H2C=C(CH2PPh2)2 and NN is N1-(3-(trimethoxysilyl)propyl)ethane-1,2-diamine] were prepared. The NN co-ligand caused release of one of the dppme ligands from [RuCl2(dppme)2] precursor to yield complex 1. The process of substitution of dppme by NN was monitored by 31P{1H}-NMR. Taking advantage of the presence of trimethoxysilane group in the backbone of complex 1, polysiloxane xerogel counterpart, X1, was prepared via sol-gel immobilization using tetraethoxysilane as cross-linker. Both complexes 1 and X1 have been characterized via elemental analysis, CV and a number of spectroscopic techniques including FT-IR, 1H-, 13C-, and 31P-NMR, and mass spectrometry. Importantly, carbonyl selective hydrogenation was successfully accomplished under mild conditions using complex 1 as a homogenous catalyst and X1 as a heterogeneous catalyst, respectively.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acrolein / analogs & derivatives*
  • Acrolein / chemistry
  • Catalysis
  • Coordination Complexes / chemical synthesis
  • Coordination Complexes / chemistry*
  • Diamines / chemical synthesis
  • Diamines / chemistry
  • Hydrogenation
  • Magnetic Resonance Spectroscopy
  • Propanols / chemistry*
  • Ruthenium / chemistry*
  • Spectroscopy, Fourier Transform Infrared

Substances

  • Coordination Complexes
  • Diamines
  • Propanols
  • Acrolein
  • Ruthenium
  • cinnamaldehyde
  • cinnamyl alcohol