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Preparation and characterization of copper/polysulfonamide complex immobilized on geraphene oxide as a novel catalyst for the synthesis of pyrimido[1,2‐a]benzimidazoles
Author(s) -
Shekarlab Nayereh,
GhorbaniVaghei Ramin,
Alavinia Sedigheh
Publication year - 2020
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.5918
Subject(s) - ethyl acetoacetate , chemistry , catalysis , thermogravimetric analysis , copper , heterogeneous catalysis , fourier transform infrared spectroscopy , inductively coupled plasma , oxide , reusability , scanning electron microscope , condensation reaction , elemental analysis , nuclear chemistry , organic chemistry , chemical engineering , plasma , materials science , physics , software , quantum mechanics , computer science , engineering , composite material , programming language
Copper–polysulfonamide complex immobilized on geraphene oxide as a novel heterogeneous catalyst (GO@PSA‐Cu) was synthesized and the structure and morphology of catalyst were characterized with various analytical techniques such as Fourier‐transform infrared spectroscopy, scanning electron microscopy, energy‐dispersive X‐ray, N 2 isotherms, elemental mapping, inductively coupled plasma–MS, and thermogravimetric analysis. The GO@PSA‐Cu catalyst demonstrated good to excellent yields for the synthesis new derivatives of pyrimido[1,2‐a]benzimidazoles via one‐pot three‐component condensation reaction of various aromatic aldehydes, 2‐aminobenzimidazole, and ethyl acetoacetate in ethanol. The method presented herein has several prominent advantages such as cost‐effectiveness, operational simplicity, short reaction times, high yields, and reusability of the catalyst even after six consecutive runs.