Catalytic performance of cadmium pyrophosphate in the knoevenagel condensation and one-pot multi-component reaction of chromene derivatives

A simple, efficient, and eco-friendly process for the Knoevenagel condensation between various aromatic aldehydes and active methylene compounds and the synthesis of 2-amino-4H-chromene derivatives via a multi-component reaction of various aromatic aldehydes, malononitrile, and resorcinol catalyzed...

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Veröffentlicht in:Journal of chemical sciences (Bangalore, India) India), 2023-08, Vol.135 (3), Article 95
Hauptverfasser: Chehab, Soukaina, Merroun, Youssef, Elhallaoui, Achraf, Ghailane, Tourya, Boukhris, Said, Guedira, Taoufiq, Ghailane, Rachida, Souizi, Abdelaziz
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Sprache:eng
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Zusammenfassung:A simple, efficient, and eco-friendly process for the Knoevenagel condensation between various aromatic aldehydes and active methylene compounds and the synthesis of 2-amino-4H-chromene derivatives via a multi-component reaction of various aromatic aldehydes, malononitrile, and resorcinol catalyzed by mono-ammonium phosphate fertilizer (MAP) modified by cadmium chloride (CdCl 2 ) is described. This synthesis procedure is considered an attractive method due to its excellent yields, short reaction time, green conditions, cost-effectiveness, use of a non-toxic solvent, non-chromatographic purification of products, and recyclability of the catalyst. Graphical abstract A simple, efficient, and ecofriendly process is proposed to synthesize 2-amino-4H-chromene and 2-(4-chlorobenzylidene) malononitrile derivatives via the application of cadmium pyrophosphate (Cd 2 P 2 O 7 ) as catalyst prepared from the modification of mono-ammonium phosphate fertilizer (MAP) by adding cadmium chloride (CdCl 2 ). The products were obtained with good yields in a short reaction time.
ISSN:0973-7103
0973-7103
DOI:10.1007/s12039-023-02213-x