Abstract
In this work, some results of the liquid-phase racemic and enantioselective hydrogenation of 3,4-hexanedione are presented. The catalysts employed were platinum-based, supported on SiO2. Monometallic catalysts were modified with organotin precursors either chiral (hexa(−)-menthylditin, Men3Sn–SnMen3) or achiral (tetrabutyltin, SnBu4), and they were obtained via surface organometallic chemistry on metals techniques. Asymmetric system was selective to 4-hydroxyhexan-3-one, the enantiomeric excess achieved being 17%.
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Notes
In CDCl3; chemical shifts, δ, in ppm with respect to TMS; multiplicity, n°H, coupling constants nJ(Sn,H) in Hz, in parenthesis.
In CDCl3; chemical shifts, δ, in ppm with respect to TMS; coupling constants n J(Sn,C) in Hz, in parentheses.
In CDCl3; chemical shifts, δ, in ppm with respect to (CH3)4Sn.
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Acknowledgements
This work has been sponsored by UNLP (Project X487, Argentina) and ANPCyT (PICT 14-11243, Argentina).
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Vetere, V., Faraoni, M.B., Podestá, J.C. et al. Asymmetric Hydrogenation of 3,4-Hexanedione over PtSn Catalysts. Catal Lett 138, 34–39 (2010). https://doi.org/10.1007/s10562-010-0373-5
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DOI: https://doi.org/10.1007/s10562-010-0373-5