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. 2022 Jul 31;27(15):4901. doi: 10.3390/molecules27154901

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© 2022 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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(A) Synthesis of thiocoumarins via traditional Lewis acid formation. (B) A straightforward organocatalytic synthesis of 4-aroylcoumarins. (C) Michael reactions at position 3 of the scaffold. (D) α-Regioselective Heck coupling of tosylates.