期刊
CATALYSIS COMMUNICATIONS
卷 138, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.catcom.2020.105954
关键词
Biopolymer; Chitosan; Heterogeneous catalysis; Knoevenagel condensation; Solid base
资金
- University Grants Commission, New Delhi
- Department of Science and Technology, India [EMR/2016/006500]
A natural biopolymer chitosan is being employed as heterogeneous solid base catalyst for the Knoevenagel condensation reaction between benzaldehydes and cyanoacetamide under mild reaction conditions. This reaction offers the direct synthesis of condensation product with two functional groups that can readily be functionalized. The biopolymer is used for five cycles with no decrease in activity and hot filtration test proves heterogeneity of the reaction. Some of the salient features of this strategy include biodegradability of catalyst, high catalyst stability, mild reaction conditions and wide substrate scope. The structural integrity is retained even after repeated cycles as evidenced by powder X-ray diffraction (XRD).
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