Nashrieh Shimi va Mohandesi Shimi Iran

Nashrieh Shimi va Mohandesi Shimi Iran

Synthesis and characterization of manganese (II) catalyst loaded on SBA-15 support and its application in the synthesis of quinoxaline and pyridopyrazine heterocycles in aqueous medium

Document Type : Research Article

Authors
Farnaz Jafarpour
Mahdieh Sharifi
Razieh Nikjoo
School of Chemistry, College of Science, University of Tehran, Tehran, IRAN
Abstract
A manganese (II) catalyst loaded onto the SBA-15 support containing a bidentate N-O Schiff-base ligand was prepared and it was applied in the synthesis of quinoxaline, pyrazine and pyrido pyrazine heterocycles. The nanocatalyst was characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), infrared spectroscopy and nitrogen adsorption/desorption isotherm. The results from X-ray diffraction and transmission electron microscopy show that the textile properties of SBA-15 are preserved after grafting of manganese (II) complex. A variety of aforementioned heterocycles were synthesized easily and with good yields under green conditions in aqueous medium via ring condensation of 1,2-diamines and 1,2-diketones in the presence of  catalytic amounts of catalyst.
Keywords
Heterogeneous catalyst
Mn(II) complex
SBA-15
Quinoxaline
Pyridopyrazine
Water
Subjects
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