Characterization and Application of SO3H-functionalized Phthalimide (SFP) as an Efficient and Recyclable Catalyst for the Solvent-free Synthesis of 2-Amino-4H-chromenes

Document Type : Full Paper


Department of Chemistry, Payame Noor University, PO BOX 19395-3697, Tehran, Iran


In this research, SO3H-functionalizedphthalimide (SFP) has been prepared through simple reaction of phthalimide with chlorosulfonic acid, and characterized using FT-IR, 1H NMR, 13C NMR, SEM (scanning electron microscopy), mass and TG (thermal gravimetric) spectra. Afterward, the solid acid has been utilized as an efficient, green, heterogeneous and recyclable catalyst for the solvent-free synthesis of 2-amino-4H-chromenes by the one-pot multi-component reaction of aromatic aldehydes with malononitrile and 1-naphthol under thermal (70 °C) and microwave (540 W) conditions.