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Synthesis of some benzimidazole‐ and benzothiazole‐derived ligand systems and their precursory diacids
Journal article   Open access   Peer reviewed

Synthesis of some benzimidazole‐ and benzothiazole‐derived ligand systems and their precursory diacids

Anthony W. Addison, T. Nageswara Rao and Curtis G. Wahlgren
Journal of heterocyclic chemistry, v 20(6), pp 1481-1484
Nov 1983
url
https://doi.org/10.1002/jhet.5570200609View
Published, Version of Record (VoR)Maybe Open Access (Publisher Bronze) Open

Abstract

Procedures are described for the preparation of various bidentate and linear tetradentate benzimidazoles and benzothiazoles incorporating units such as pyridyl and thioether, and for the preparation of certain thioether dicarboxylic acids precursory to them. Condensations of ortho‐functinal anilines with carboxylic acids were carried out in polyphosphoric acid or refluxing HCl solution. Syntheses are reported for: [HO2C(CH2)2S(CH2)2]2X (X = O, S), 1,9‐bis(benzimidazol‐2‐yl)‐2,5,8‐trithianonane, 1,11‐bis(N‐methylbenzimidazol‐2‐yl)‐3,6,9‐trithiaundecane, 1,11‐bis(2‐benzimidazol‐2‐yl)‐6‐oxo‐3,9‐dithiaundecane, 2‐(2‐pyridyl)benzothiazole, 2,6‐bis(benzothiazol‐2‐yl)pyridine, 2‐(2‐pyridyl)‐N‐methylbenzimidazole, 2‐(2‐pyridylmethyl)benzimidazole and 2‐(N‐methyl‐2‐piperidyl)benzimidazole. The compounds were characterized, where appropriate, by their mass, uv and 1H‐nmr spectra.

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Web of Science research areas
Chemistry, Organic
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