Sustainable synthesis of chromene derivatives catalysed by magnetite nanoparticle cored polyamine dendrimer

Abstract

Chromene derivatives are naturally occurring heterocyclic compounds used as cosmetic agents, food additives, and potential biodegradable agrochemicals. Normally, its synthesis is carried out with three component/substrates with a suitable base. Dendrimer with amine functionality has several applications in catalysis, more specifically, dendrimers having enriched amino groups with accessible void makes a significant impact in base catalysis. Moreover, polar periphery of the dendrimers may enhance the solubility of material in the reaction medium. Therefore, herein we report the base catalytic efficiency of magnetite nanoparticle supported polyamine dendrimer with enriched amine groups and peripheral carboxyl groups. Actually, magnetite supported polyamine dendrimer synthesis involves the synthesis of PAMAM G3 on magnetite nanoparticle core, followed by reduction of amide group with subsequent functionalization of carboxylic acid terminals. Further, it is used as versatile polyvalent base for the synthesis of chromene derivatives. The magnetite supported dendritic scaffold has accessible voids and polar periphery which enables them dispersible in the reaction medium. The recycle efficiency study confirms, the competency of the material to work in industrial catalysis.