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Bioorg Med Chem. 2012 Dec 1;20(23):6856-61. doi: 10.1016/j.bmc.2012.09.044. Epub 2012 Sep 29.

Synthesis of N-phenyl-N-(3-(piperidin-1-yl)propyl)benzofuran-2-carboxamides as new selective ligands for sigma receptors.

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  • 1Department of Natural Sciences, Savannah State University, College of Sciences and Technology, Savannah, Georgia 31404, USA.


Novel benzofuran-2-carboxamide ligands, which are selective for sigma receptors, have been synthesized via a microwave-assisted Perkin rearrangement reaction and a modified Finkelstein halogen-exchange used to facilitate N-alkylation. The ligands synthesized are the 3-methyl-N-phenyl-N-(3-(piperidin-1-yl)propyl)benzofuran-2-carboxamides (KSCM-1, KSCM-5 and KSCM-11). The benzofuran-2-carboxamide structure was N-arylated and N-alkylated to include both N-phenyl and N-(3-(piperidin-1-yl)propyl substituents, respectively. These new carboxamides exhibit high affinity at the sigma-1 receptor with K(i) values ranging from 7.8 to 34nM. Ligand KSCM-1 with two methoxy substituents at C-5 and C-6 of the benzofuran ring, and K(i)=27.5nM at sigma-1 was found to be more selective for sigma-1 over sigma-2.

Copyright © 2012 Elsevier Ltd. All rights reserved.

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