Ruthenium(II)-carbonyl complexes containing two N-monodentate 1,8-naphthyridine ligands active catalysis in transfer hydrogenation reactions

Abstract : The reaction of 2-aminonicotinaldehyde with 2- or 4-methoxyacetophenone in basic media leads to the new ligands 2-(4-methoxyphenyl)-1,8-naphthyridine and 2-(2-methoxyphenyl)-1,8-naphthyridine, respectively, in high yield. The reaction of these naphthyridine derivatives with [RuCl2(CO)(2)](n) leads to the respective complexes cis-dicarbonyldichloridobis[2-(4-methoxyphenyl)-1,8-naphthyridine-kappa N-8]ruthenium(II) and cis-dicarbonyldichloridobis[2-(2-methoxyphenyl)-1,8-naphthyridine-kappa N-8]ruthenium(II), both [RuCl2(C15H12N2O)(2)(CO)(2)], in good yield. Both ruthenium(II) complexes display a slightly distorted octahedron with two cis carbonyl, two cis chloride and two cis naphthyridine ligands, the latter coordinated in a monodentate fashion through the N atom in the 8-position. Both complexes exhibit a moderate catalytic activity in the hydrogen-transfer reaction from propan-2-ol to acetophenone in the presence of a base, with 100% selectivity.
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Submitted on : Monday, November 26, 2018 - 4:08:25 PM
Last modification on : Thursday, October 3, 2019 - 1:41:41 PM

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Juana Guajardo, Andres Ibanez, Véronique Guerchais, Andres Vega, Sergio Moya, et al.. Ruthenium(II)-carbonyl complexes containing two N-monodentate 1,8-naphthyridine ligands active catalysis in transfer hydrogenation reactions. Acta Crystallographica Section C Structural Chemistry, International Union of Crystallography, 2018, 74 (11), pp.1547-+. ⟨10.1107/S2053229618014201⟩. ⟨hal-01935368⟩

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