Chinese Journal of Catalysis ›› 2012, Vol. 33 ›› Issue (8): 1423-1426.DOI: 10.3724/SP.J.1088.2012.20341

• Research papers • Previous Articles     Next Articles

In-Situ Liquid Phase Catalytic Hydrogenation for One-Pot Synthesis of Quinolines from Aromatic Nitro Compounds

GU Huizi, XU Xiangsheng, CHEN Ao’ang , YAN Xinhuan*   

  1. State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, China
  • Received:2012-04-20 Revised:2012-06-15 Online:2012-08-01 Published:2012-08-01

Abstract: A new hydrogenation system was proposed for the synthesis of quinolines. Aromatic nitro compounds and ethanol/water solution were used as the starting materials, and Pt-Sn/γ-Al2O3 was the catalyst. The quinolines were synthesized by the one-pot method with an in-situ liquid phase hydrogenation system. The reaction results showed that the Pt/Sn molar ratio and the reaction conditions including temperature and the concentration of the substrate and water played an important role on the yield of the quinolines. When the Pt/Sn molar ratio was 0.5, under the conditions of 220 oC, 5.0 MPa, 6% substituted nitrobenzene concentration with 70% EtOH and 30% H2O solution, the total yield of 6-methoxyl-2-methyl quinoline reached 72.0%.

Key words: platinum, tin, aluminium oxide, in situ liquid phase hydrogenation, aromatic nitro compound, quinoline