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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Fluorinated phenylcyclopropylamines. Part 4: effects of aryl substituents and stereochemistry on the inhibition of monoamine oxidases by 1-aryl-2-fluoro-cyclopropylamines.

A series of para-ring-substituted (E)- and (Z)-1-aryl-2-fluorocyclopropylamines were examined as inhibitors of recombinant human liver monoamine oxidase A (MAO A) and B (MAO B). Unlike the parent 1-phenylcyclopropylamine, which is a selective inhibitor of MAO B, both (E)- and (Z)-diastereomers of derivatives having fluorine at the 2-position of the cyclopropane ring were potent and selective irreversible inhibitors of MAO A. Both electron releasing groups (Me, OMe) and electron attracting groups (Cl, F) substituted in the para-position caused a modest increase in activity. Geminal difluoro-substitution caused a loss of potency of 100-fold compared to either (E)- or (Z)-monofluorinated analogue. Surprisingly, (1S,2R)-2-fluoro-1-phenylcyclopropylamine and the (1R,2S)-enantiomer were essential equally potent as inhibitors of MAO A and MAO B. None of the tested 1-aryl-2-fluorocyclopropylamines exhibited significant inhibition of tyramine oxidase.[1]

References

  1. Fluorinated phenylcyclopropylamines. Part 4: effects of aryl substituents and stereochemistry on the inhibition of monoamine oxidases by 1-aryl-2-fluoro-cyclopropylamines. Ye, S., Yoshida, S., Fröhlich, R., Haufe, G., Kirk, K.L. Bioorg. Med. Chem. (2005) [Pubmed]
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