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Green synthesis of 5-benzylidene rhodanine derivatives catalyzed by 1-butyl-3-methyl imidazolium hydroxide in water

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Abstract

A basic functionalized ionic liquid, 1-butyl-3-methyl imidazolium hydroxide ([bmim][OH]), catalyzed the Knoevenagel condensation of rhodanine with aromatic aldehydes. It proceeded smoothly in water to afford the 5-benzylidene rhodamine derivatives in high yields at room temperature. This new method offers several advantages, such as excellent yields, short reaction times, and simple procedure. The catalyst can be reused at least 5 times without significant loss of activity.

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Authors and Affiliations

  1. School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, P.R. China

    Kai Gong, Zhi-Wei He, Ying Xu, Dong Fang & Zu-liang Liu

Authors
  1. Kai Gong
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  2. Zhi-Wei He
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  3. Ying Xu
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  4. Dong Fang
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  5. Zu-liang Liu
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Corresponding author

Correspondence to Zu-liang Liu.

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Correspondence: Zu-liang Liu, School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, P.R. China.

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Gong, K., He, ZW., Xu, Y. et al. Green synthesis of 5-benzylidene rhodanine derivatives catalyzed by 1-butyl-3-methyl imidazolium hydroxide in water. Monatsh Chem 139, 913–915 (2008). https://doi.org/10.1007/s00706-008-0871-y

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  • DOI: https://doi.org/10.1007/s00706-008-0871-y

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