Sharif University of Technology Scientia Iranica 1026-3098 24 6 2017 12 01 Pyridylmethylaminoacetic acid functionalized Fe3O4 magnetic nanorods as an efficient catalyst for the synthesis of 2-aminochromene and 2-aminopyran derivatives 3022 3031 4513 10.24200/sci.2017.4513 EN Bagher Eftekhari-Sis Department of Chemistry, University of Maragheh, P.O. Box 55181-83111, Maragheh, Iran Masoumeh Sarvari Karajabad Department of Chemistry, University of Maragheh, P.O. Box 55181-83111, Maragheh, Iran Shiva Haqverdi Department of Chemistry, University of Maragheh, P.O. Box 55181-83111, Maragheh, Iran Journal Article 2017 03 15 2-[(2-Pyridylmethyl)amino]acetic acid (PMAA) functionalized Fe₃O₄ superparamagnetic nanorods efficiently catalyzed three-component reaction of malononitrile, aromatic aldehydes and phenolic or enolic components, such as <em>α</em>-naphthol, <em>β</em>-naphthol, dimedone or kojic acid, to synthesize a variety of chromene or pyran derivatives in good to high yields. PMAA functionalized Fe₃O₄ magnetic nanorods were prepared <em>via</em> simple coprecipitation from an aqueous solution of Fe²⁺ and Fe³⁺ ions using NH₄OH in the presence of glycine, followed by subjecting with 2-pyridine carbaldehyde and then NaBH₄-mediated reduction of <em>in-situ</em> generated imine. Obtained nanorods were characterized by FT-IR, XRD, TGA, SEM, EDX, TEM, BET and VSM analysis. https://scientiairanica.sharif.edu/article_4513_e5a94a6d01b4ec141f1caf60215f12cb.pdf