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Citation: Qi Xiu-Fang, CHENG Guang-Bin, LÜ Chun-Xu, QIAN De-Sheng. Regioselective Nitration of Toluene with HNO₃/Ac₂O Catalyzed by Caprolactam-Based Brφnsted Acidic Ionic Liquids[J]. Chinese Journal of Applied Chemistry, ;2008, 25(2): 147-151. shu

Regioselective Nitration of Toluene with HNO₃/Ac₂O Catalyzed by Caprolactam-Based Brφnsted Acidic Ionic Liquids

1.
School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094

Corresponding author: CHENG Guang-Bin,
Received Date: 14 January 2007
Available Online: 30 May 2007
Fund Project: 国防科工委"十五"预研项目(40406020103) (40406020103)

Several new caprolactam-based Brφnsted acidic ionic liquids[Caprolactam]X(X^-=pTSOX^-,BSOX^-,BFX₄^-,NOX₃^-) with relatively low cost and low toxicity were synthesized and used for the first time in catalyzing organic reaction.They showed good catalytic activity in the nitration of toluene with HNO₃/Ac₂O.Among them,[Caprolactam]pTSO was the best one probably because of its better affinity for aromatics than the others.[Caprolactam]pTSO catalyzed the reaction at room temperature for 2 h,achieving a high yield(99.7% from GC) of mono-nitrotoluenes and good para-selectivity(ortho/para=1.03) when the molar ratio of nitric acid to toluene was 1:1 and the molar fraction of[Caprolactam]pTSO was 10%.When[Capro-lactam]pTSO was reused for the fourth time,the yield of mono-nitrotoluenes was 93.4%(from GC) and the ortho/para ratio was 1.12.
- caprolactam-based Brφnsted acidic ionic liquid,
- HNO₃/Ac₂O,
- nitration,
- catalyze,
- toluene
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Regioselective Nitration of Toluene with HNO3/Ac2O Catalyzed by Caprolactam-Based Brφnsted Acidic Ionic Liquids

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通讯作者: 陈斌, bchen63@163.com

Regioselective Nitration of Toluene with HNO₃/Ac₂O Catalyzed by Caprolactam-Based Brφnsted Acidic Ionic Liquids