Chinese Journal of Catalysis

Chinese Journal of Catalysis ›› 2015, Vol. 36 ›› Issue (7): 957-960.DOI: 10.1016/S1872-2067(15)60860-9

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Hydrogenation of coumarin to octahydrocoumarin over a Ru/Ccatalyst

Dana Bílkováa, Petr Jansab, Iva Paterováa, Libor ?ervenýa   

  1. a Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;
    b School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China;
    c School of Chemical and Environmental Engineering, Hubei University for Nationalities, Enshi 445000, Hubei, China
  • Received:2015-01-03 Revised:2015-04-08 Online:2015-06-12 Published:2015-07-30
  • Supported by:

    This work was supported by specific university research (MSMT No. 20/2014).

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Abstract:

The production of octahydrocoumarin, which can serve as a replacement for toxic coumarin, was investigated using 5% Ru on active carbon (Ru/C) as the catalyst for the hydrogenation of coumarin. The hydrogenation was studied by optimizing the reaction conditions (pressure, solvent and coumarin concentration). The activity and selectivity of the Ru/C catalyst were compared for different solvents. The mechanism of coumarin hydrogenation was deduced. The formation of side products was explained. The optimal hydrogenation reaction conditions were: 130 ℃, 10 MPa, 60 wt% coumarin in methanol, and 0.5 wt% (based on coumarin) of Ru/C catalyst. At the complete conversion of coumarin, the selectivity to the desired product was 90%.

Key words: Hydrogenation, Coumarin, Octahydrocoumarin, Supported ruthenium catalyst, Selectivity