Design, Synthesis, Characterization of Novel Ruthenium(II) Catalysts: Highly Efficient and Selective Hydrogenation of Cinnamaldehyde to (E)-3-Phenylprop-2-en-1-ol

Molecules

Hany W. Darwish⁴  Assem Barakat²  Ayman Nafady²  Mohammed Suleiman³  Mousa Al-Noaimi¹  Belkheir Hammouti⁶  Smaail Radi⁷  Taibi Ben Hadda⁵  Ahmad Abu-Obaid³  Mohammad S. Mubarak⁸ 

[1] Department of Chemistry, Hashemite University, Zarqa 13115, Jordan; E-Mail:;Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia; E-Mail:;Department of Chemistry, Science College, An-Najah National University, P.O. Box 7, Nablus 0092, Palestine; E-Mails:;Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia; E-Mail:;Lab of Chemical Material, FSO, University Mohammed Premier, Oujda-60000, Morocco; E-Mail:;LCAE-URAC18, Faculty of Science, University Mohammed Premier, Oujda-60000, Morocco; E-Mail:;LCAE, Chemistry Department, Faculty of Sciences, University Mohammed Premier, Oujda-60000, Morocco; E-Mail:;Department of Chemistry, The University of Jordan, Amman 11942, Jordan; E-Mail:

关键词: Ru(II) complexes;    hydrogenation;    diphosphine;    cinnamic aldehyde;    NMR;   

DOI  :  10.3390/molecules19055965

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2014 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.