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Microwave-assisted Knoevenagel condensation in aqueous over triazine-based microporous network

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Abstract

A high nitrogen-containing triazine-based microporous polymeric (TMP) network was used as an efficient metal-free catalyst for Knoevenagel condensation of ethylcyanoacetate with aromatic aldehydes. The reactions were performed in water as an environmentally benign medium, under microwave irradiation within a short reaction time of 10 min. The conversions of substituted aromatic aldehydes and selectivities for Knoevenagel products were found to be in the ranges of 44–99 and 65–99 %, respectively. The electron-withdrawing substituent showed higher conversion and selectivity as compared to electron-donating substituents. The TMP network can be readily recovered and reused up to three runs without loss in catalytic activity and selectivity.

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Acknowledgments

This work was supported by the National Research Foundation of Korea[NRF] grant funded by the Korea government [MSIP] [No.20090083525] and INHA University, Korea.

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Authors and Affiliations

  1. Laboratory of Nano-Green Catalysis and Nano Center for Fine Chemicals Fusion Technology, Department of Chemistry, Inha University, Inchon, 402-751, Korea

    Mohd Bismillah Ansari, Mst. Nargis Parvin & Sang-Eon Park

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  1. Mohd Bismillah Ansari
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  2. Mst. Nargis Parvin
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  3. Sang-Eon Park
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Correspondence to Sang-Eon Park.

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Ansari, M.B., Parvin, M.N. & Park, SE. Microwave-assisted Knoevenagel condensation in aqueous over triazine-based microporous network. Res Chem Intermed 40, 67–75 (2014). https://doi.org/10.1007/s11164-013-1456-x

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  • DOI: https://doi.org/10.1007/s11164-013-1456-x

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