A series of 3,5-diaryl pyrazoles were prepared and assayed
for their ability to inhibit reversibly monoamine oxidase-A (MAO-A)
and monoamine oxidase B (MAO-B). Several compounds show
inhibitory activity with concentration values in the nanomolar range.
A computational work was carried out on the two most selective
inhibitors that have tautomeric pyrazole forms. The binding free energies
of these compounds for each MAO isoform were influenced by the
tautomeric equilibria.