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. 2021 Oct 30;26(21):6583. doi: 10.3390/molecules26216583

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© 2021 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 (https://creativecommons.org/licenses/by/4.0/).

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Scheme 4 — Synthesis of compounds 13a–c and 14a–c. Reagents and conditions: (a) 4-bromophenyl-2-chloroacetamide (for compound 13a [27], 3- or 4-hydroxyphenyl-2-chloroacetamide (for compounds 13b and 13c [29,30]), K₂CO₃, anhydrous CH₃CN, reflux, 5–6 h. (b) 1 M BBr₃/CH₂Cl₂, anhydrous CH₂Cl₂, room temperature, 2–6 h.