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Facile Synthesis of Benzimidazole and Benzothiazole Compounds Mediated by a Zinc Precatalyst Supported by an Iminopyrrole-Morpholine Ligand
K. Bano, D.A. Kisan,
Published in John Wiley and Sons Inc
2022
Volume: 2022
   
Issue: 10
Abstract
Three zinc complexes, with the general formula {κ2-C4H3NH[2-CH=NCH2CH2N(CH2CH2)2O]ZnX2} [X=Cl (2 a), Br (2 b), I (2 c)], supported by a neutral iminopyrrole-morpholine ligand, were synthesized by the reaction between {C4H3NH-2-[CH=NCH2CH2N (CH2CH2)2O]} (1) and anhydrous zinc dihalides (ZnCl2, ZnBr2, ZnI2) at ambient temperature in dry methanol. The zinc complexes were fully characterized using multinuclear NMR spectroscopic techniques and the molecular structures of complexes 2 a and 2 c in their solid states were determined by single-crystal X-ray diffraction analysis. The zinc diiodo complex (2 c) proved to be a competent precatalyst in the formation of a wide range of benzimidazole and benzothiazole compounds, via aerobic oxidative condensation of several benzylamines with o-phenylenediamine, N-phenyl-o-phenylene-diamine, and o-mercaptoaniline. The benzimidazole and benzothiazole derivatives were successfully characterized using 1H and 13C{1H} NMR spectroscopy. © 2022 Wiley-VCH GmbH.
About the journal
JournalData powered by TypesetEuropean Journal of Inorganic Chemistry
PublisherData powered by TypesetJohn Wiley and Sons Inc
ISSN14341948