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. 2019 Jul 29;24(15):2757. doi: 10.3390/molecules24152757

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© 2019 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Scheme 13 — Synthesis of 6-substituted benzothiazoles. Reagents and conditions: (a₁) KSCN, Br₂, acetic acid, 10 °C–RT; (a₂) KSCN, tetramethylammonium dichloroiodate, DMSO/water, RT–70 °C; (b) CDI, DCM, RT; (c) 4-amino-2-chlorophenol, MeCN, reflux.