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

Triethylenetetramine-grafted magnetic graphene oxide (Fe3O4@GO-NH2) was used as a reusable heterogeneous catalyst in the preparation of 2-amino-4H-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.