Abstract
The ionic liquid supported on magnetic nanoparticles ( -Fe2O3@SiO2-IL-ZnxCly) was found to be an effective catalyst for the Paal–Knorr reaction. The condensation of aromatic amine and acetonylacetone under solvent-free sonication afforded the desired pyrrole derivatives in high yields. The pyrrole derivatives was isolated in yield with a environmentally friendly process. The structure of products was determined by modern methods such as nuclear magnetic resonance spectroscopy (1H and 13C NMR), high resolution mass spectrometry (HR-ESI-MS) or gas chromatography-mass spectrometry (GS-MS). Moreover, the catalyst could be easily recovered by magnetic separation and reused for five times without significant loss of the catalytic activity.
Highlights
The ionic liquid supported on magnetic nanoparticles
The pyrrole derivatives was isolated in yield
The structure of products was determined by modern methods
Summary
O-toluidine, acetonylacetone, 2,4dinitrophenylhydrazine, 4-nitro-ophenylenediamine, 2-amino-4-nitrophenol, 2amino-p-cresol, 2-aminobiphenyl được mua từ. Diethyl ether, Na2SO4, NaHCO3 của Trung Quốc. TẠP CHÍ PHÁT TRIỂN KHOA HỌC & CÔNG NGHỆ: CHUYÊN SAN KHOA HỌC TỰ NHIÊN, TẬP 2, SỐ 5, 2018.
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