2-(2-thienyl)-6-methyl-6H-imidazo[4,5-g][1,3]benzothiazole: Synthesis and some transformations
- Authors: Elchaninov M.M.1, Pyatnitsyna E.V.1
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Affiliations:
- Platov Southern Russian State Polytechnic University
- Issue: Vol 87, No 3 (2017)
- Pages: 420-424
- Section: Article
- URL: https://journals.rcsi.science/1070-3632/article/view/218673
- DOI: https://doi.org/10.1134/S1070363217030100
- ID: 218673
Cite item
Abstract
Oxidation of N-(1-methylbenzimidazol-5-yl)thiophene-2-carbothioamide with potassium ferricyanide in an alkaline medium by Jacobson’s method afforded 2-(thien-2-yl)-6-methyl-6H-imidazo[4,5-g][1,3]benzothiazole. The latter enters into the electrophilic substitution reaction (nitration, bromination, formylation, acylation) exclusively at the position 5 of the thiophene ring. Characteristic reactions of nucleophilic substitution occurred at the imidazole ring. Quaternization with methyl iodide in benzene furnished the corresponding quaternary salt, whereas the Chichibabin amination with an excess of sodium amide in xylene gave negative result.
About the authors
M. M. Elchaninov
Platov Southern Russian State Polytechnic University
Author for correspondence.
Email: elchaninov-43@mail.ru
Russian Federation, ul. Prosveshcheniya 132, Novocherkassk, 346428
E. V. Pyatnitsyna
Platov Southern Russian State Polytechnic University
Email: elchaninov-43@mail.ru
Russian Federation, ul. Prosveshcheniya 132, Novocherkassk, 346428