Citation: Fen Dong, Yi Qun Li, Rong Feng Dai. Knoevenagel condensation catalysed by poly(vinyl chloride) supported tetraethylenepentamine (PVC-TEPA)[J]. Chinese Chemical Letters, ;2007, 18(3): 266-268. doi: 10.1016/j.cclet.2007.01.023 shu

Knoevenagel condensation catalysed by poly(vinyl chloride) supported tetraethylenepentamine (PVC-TEPA)

Department of Chemistry, Jinan University, Guangzhou 510632, China

Received Date: 26 September 2006

Fund Project: The project was supported by the National Natural Science Foundation of China (No. 20672046) and the Guangdong Natural Science Foundation (No. 04010458).

Poly(vinyl chloride) supported tetraethylenepentamine (PVC-TEPA) has been found to be an efficient catalyst for the Knoevenagel condensation. A wide range of aromatic aldehydes easily undergo condensations with ethyl cyanoacetate and malononitrile in the commercial 95% ethanol in refluxing using PVC-TEPA as catalyst to afford the desired products of good purity in moderate to excellent yields. A recycling study confirmed that the catalyst could be reused, the yield of the desired condensation product were not reduced. The merits of this protocol are environmentally benign, simple operation, convenient work-up and good yields. Furthermore, the catalyst can easily be recovered and reused at five times with comparable yields.
- Knoevenagel condensation,
- PVC-supported tetraethylenepentamine,
- Catalysis
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