Simple, Potent, and Selective Pyrrole Inhibitors of Monoamine Oxidase Types A and B
作者:Romano Silvestri、Giuseppe La Regina、Gabriella De Martino、Marino Artico、Olivia Befani、Marianna Palumbo、Enzo Agostinelli、Paola Turini
DOI:10.1021/jm0256124
日期:2003.3.1
and tested for their monoamineoxidasetypes A and B inhibitory activity. 2-(N-Methyl-N-propargylaminomethyl)-1H-pyrrole (24) was the most potent MAO-A inhibitor of the series [K(i)(MAO-A) = 0.0054 microM], but it was not selective. Inhibitors N-4-fluorobenzyl-1H-pyrrole-2-carboxamide (12) and N-cyclohexylmethyl-1H-pyrrole-2-carboxamide (25) showed the highest MAO-A selectivity indexes (SI) corresponding
New Pyrrole Inhibitors of Monoamine Oxidase: Synthesis, Biological Evaluation, and Structural Determinants of MAO-A and MAO-B Selectivity
作者:Giuseppe La Regina、Romano Silvestri、Marino Artico、Antonio Lavecchia、Ettore Novellino、Olivia Befani、Paola Turini、Enzo Agostinelli
DOI:10.1021/jm060882y
日期:2007.3.1
A series of new pyrrole derivatives have been synthesized and evaluated for their monoamine oxidase (MAO) A and B inhibitory activity and selectivity. N-Methyl,N-(benzyl),N-(pyrrol-2-ylmethyl)amine (7) and N-(2-benzyl),N-(1-methylpyrrol-2-ylmethyl)amine (18) were the most selective MAO-B (7, SI = 0.0057) and MAO-A (18, SI = 12500) inhibitors, respectively. Docking and molecular dynamics simulations gave structural insights into the MAO-A and MAO-B selectivity. Compound 18 forms an H-bond with Gln215 through its protonated amino group into the MAO-A binding site. This H-bond is absent in the 7/MAO-A complex. In contrast, compound 7 places its phenyl ring into an aromatic cage of the MAO-B binding pocket, where it forms charge-transfer interactions. The slightly different binding pose of 18 into the MAO-B active site seems to be forced by a bulkier Tyr residue, which replaces a smaller Ile residue present in MAO-A.
Synthesis of pyrroloazepinones: platinum- and gold-catalyzed cyclization reactions of alkynes
The synthesis of potentially bioactive pyrroloazepinones based on the catalytic intramolecularcyclization of alkyne-substituted 1H-pyrrole-2-carboxylic acid amides has been developed. In the presence of either H2PtCl6·6H2O at 120 °C or AuCl3 at room temperature pyrrolo[3,2-c]azepin-4-ones are formed.