TY - JOUR ID - 15544 TI - Fe2+ Supported on Hydroxyapatite-core-shell-γ-Fe2O3 Nanoparticles as an Inexpensive and Magnetically-recoverable Catalyst for Rapid Synthesis of Benzimidazoles and Benzoxazole Derivatives JO - Organic Chemistry Research JA - ORG.CHEM LA - en SN - AU - Rezayati, Sobhan AU - Abbasi, Zahra AU - Rezaee Nezhad, Eshagh AU - Hajinasiri, Rahimeh AU - Soleymani Chalanchi, Shahin AD - Islamic Azad University AD - Chemistry Department, College of Science Shahid Chamran University, Ahvaz, Iran AD - Department of Chemistry, Payame Noor University, PO BOX 19395-4697 Tehran, Iran AD - Chemistry Department, Qaemshahr Branch, Islamic Azad University, P.O. Box 163, Qaemshahr, Iran AD - 1Department of Chemistry, Payame Noor University, PO BOX 19395-4697 Tehran, Iran Y1 - 2016 PY - 2016 VL - 2 IS - 2 SP - 162 EP - 171 KW - γ-Fe2O3@HAp-Fe2+ NPs KW - Lewis acid KW - Magnetic nanoparticle KW - Benzimidazole KW - Benzoxazole DO - 10.22036/org.chem..2016.15544 N2 - A simple and facile method for the preparation ofFe2+ supported on hydroxyapatite-core-shell-γ-Fe2O3 nanoparticles (γ-Fe2O3@HAp-Fe2+ NPs) as an environmentally friendly and recyclable green catalyst is described and used for the one-pot synthesis of benzimidazoles and benzoxazole derivatives via reactions between aromatic aldehydes and ortho‐phenylenediamine or ortho‐aminophenol in aqueous media conditions at room temperature. This green method offers significant advantages in terms of its simplicity, very low loading of catalyst, high catalytic efficiency, good to excellent product yields, short reaction time, simple experimental and work-up procedure. Also, after the reaction, γ-Fe2O3@HAp-Fe2+ NPs can be easily recovered and reused for at least ten runs. This magnetic nanoparticle was characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscope (SEM) and vibrating sample magnetometry (VSM) spectra. UR - https://www.orgchemres.org/article_15544.html L1 - https://www.orgchemres.org/article_15544_f83d3d8bc33a5f0a31faf7c4d29da071.pdf ER -