Facile synthesis of sulfonamide-functionalized melamine-based covalent organic framework incorporating bimetal oxide MnFe2O4 as an efficient catalyst for the preparation of chromenes

Abstract

Magnetic porous nanocomposites, such as MnFe2O4@COF functionalized with sulfonamide, are significant catalysts because of their extensive surface area, strong magnetism, and acidic properties, rendering them well-suited for organic reactions. They were employed in the production of chromenes from aldehydes, 4-hydroxycoumarin, and 2-hydroxy naphthalene-1,4-dione. The magnetic nanocatalyst utilized in this investigation exhibited the ability to be recovered after five cycles with minimal decline in activity.