Cu (II) Complex Stabilized on Fe₃O₄@SiO₂ Nanoparticles: An Effective and Recoverable Catalyst for the Preparation of Chromene Derivatives

A eutectogels-catalyzed one-pot multi-component reaction: access to pyridine and chromene derivatives

“…35 With these potential advantages, various methods have been developed in recent years to create chromene derivatives. 36 In 2014, Kobra Azizi et al applied l -arginine-functionalized magnetic nanoparticles as a reusable organocatalyst with the assistance of ultrasound irradiation in the synthesis of chromenes ( Scheme 1c ). 37 In some following years, Ghasemzadeh et al , in 2017, presented the magnetite nanoparticles-supported APTES as a powerful and recoverable nanocatalyst for the preparation of 2-amino-5,10-dihydro-5,10-dioxo-4 H -benzo[ g ]chromenes ( Scheme 1d ).…”