Cobalt Schiff base complexes: Synthesis characterization and catalytic application in Suzuki–Miyaura reaction

3-Methoxysalicylaldehyde was condensed with the amines 4-aminoacetophenone and 2-amino-5-bromopyridine to obtain Schiff base ligands, 1 and 2, which were coordinated to cobalt salts as complex 1 and complex 2, respectively. The synthesized ligands and complexes were characterized by spectroscopic (F...

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Bibliographic Details
Published in:中国化学工程学报（英文版） 2019-03, Vol.27 (3), p.556-563
Main Authors: Rasheeda M. Ansari, Lolakshi K. Mahesh, Badekai Ramachandra Bhat
Format: Article
Language:English
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Summary:3-Methoxysalicylaldehyde was condensed with the amines 4-aminoacetophenone and 2-amino-5-bromopyridine to obtain Schiff base ligands, 1 and 2, which were coordinated to cobalt salts as complex 1 and complex 2, respectively. The synthesized ligands and complexes were characterized by spectroscopic (FT-IR, UV–Vis, 1H-NMR and mass spectrometry), thermal (TGA) and elemental analysis. The structures of the com-plexes were verified by evaluating their magnetic susceptibility and spectroscopic evidences. Synthesized com-plexes were studied for their catalytic activity in the Suzuki–Miyaura cross-coupling of aryl halides with phenylboronic acid. Optimized reaction yields 90% of the cyanobiphenyl for complex 1 and 91% for complex 2 with 0.1 mmol of catalyst loading thereby substantiating the C--C coupling efficiency of the synthesized com-plexes, 1 and 2.
ISSN:1004-9541
DOI:10.1016/j.cjche.2018.05.002