Journal
CHEMMEDCHEM
Volume 8, Issue 6, Pages 956-966Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cmdc.201300048
Keywords
2-arylbenzofurans; 3-arylcoumarins; docking; inhibitors; monoamine oxidase; reversibility
Categories
Funding
- Fondazione Banco di Sardegna
- MIUR
- Universita di Cagliari
- Fundacao para a Ciencia e Tecnologia [SFRH/BD/61262/2009]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/61262/2009] Funding Source: FCT
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Monoamine oxidase (MAO) is an important drug target for the treatment of neurological disorders. Several 3-arylcoumarin derivatives were previously described as interesting selective MAO-B inhibitors. Preserving the trans-stilbene structure, a series of 2-arylbenzofuran and corresponding 3-arylcoumarin derivatives were synthesized and evaluated as inhibitors of both MAO isoforms, MAO-A and MAO-B. In general, both types of derivatives were found to be selective MAO-B inhibitors, with IC50 values in the nano- to micromolar range. 5-Nitro-2-(4-methoxyphenyl)benzofuran (8) is the most active compound of the benzofuran series, presenting MAO-B selectivity and reversible inhibition (IC50=140nM). 3-(4-Methoxyphenyl)-6-nitrocoumarin (15), with the same substitution pattern as that of compound 8, was found to be the most active MAO-B inhibitor of the coumarin series (IC50=3nM). However, 3-phenylcoumarin 14 showed activity in the same range (IC50=6nM), is reversible, and also severalfold more selective than compound 15. Docking experiments for the most active compounds into the MAO-B and MAO-A binding pockets highlighted different interactions between the derivative classes (2-arylbenzofurans and 3-arylcoumarins), and provided new information about the enzymeinhibitor interaction and the potential therapeutic application of these scaffolds.
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