Abstract
The development of an active, selective, and long-term selective catalyst for the
synthesis of biologically active heterocycles is still challenging. However, magnetic nanocatalysts
have divergent applications like high efficiency, selectivity, consumption, and reusability.
The current review explores a detailed survey of the latest information on synthetic methods
of Pyrano [3, 2-c] chromene derivatives using different magnetic nanocatalysts. Numerous
studies on the synthesis of these practical compounds have been stimulated by the special
qualities and wide-ranging applications of pyrano coumarins and the nanoparticles were tested
for their catalytic effectiveness in a one-pot, three-component reaction involving aldehydes,
malononitrile, and 4-hydroxycoumarin for the synthesis of dihydropyrano [3, 2-c] chromenes
(coumarins).
Graphical Abstract
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