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Triethylenetetramine-grafted magnetic graphene oxide (Fe 3 O 4 @GO-NH 2 ) was used as a reusable heterogeneous catalyst in the preparation of 2-amino-4 H -benzopyran derivatives. The characteristics of this method include green reaction conditions, easy separation, compatibility with the environment, the cost-effectiveness of the catalyst, and high yield (85–98%) in a short reaction time. It was also found that it could be reused for at least seven cycles without significant performance degradation.

polycyclic aromatic compounds

Triethylenetetramine-Grafted Magnetic Graphene Oxide (Fe 3 O 4 @GO-NH 2 ) as a Reusable Heterogeneous Catalyst for the One-Pot Synthesis of 2-Amino-4 H -Benzopyran Derivatives