1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine Analogues. Inactivation of Monoamine Oxidase by Conformationally Rigid Analogues of N,N-Dimethylcinnamylamine

Charles K. Hiebert, Richard B. Silverman*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) is a potent neurotoxin and also an inactivator of monoamine oxidase (MAO). Since MPTP is a conformationally rigid analogue of N,N-dimethylcinnamylamine, other conformationally rigid analogues of N,N-dimethylcinnamylamine were synthesized and tested as inhibitors and inactivators of MAO. (E)-2-(Phenylmethylene)cyclohexanamine (5a)(E)-N,N-dimethyl-2-(phenylmethylene)cyclohexanamine (5b), 3-phenyl-2-cyclohexen-1-amine (6a), N,N-dimethyl-3-phenyl-2-cyclohexen-1-amine (6b), and (E)- and (Z)-N-methyl-3-(phenylmethylene)piperidine (7 and 8) are all inhibitors and time-dependent inactivators of MAO B, but none is as potent as MPTP. α-Methylation and methylation of the amino group in all cases increases the Ki value relative to that for the parent compound. Compounds 5a, 5b, 6a, and 6b are highly cytotoxic, but cytotoxicity is not prevented by pretreatment of the cells with pargyline. There does not appear to be a correlation between the configuration of the N,N-dimethylcinnamylamine analogue and its potency as a MAO inactivator.

Original languageEnglish (US)
Pages (from-to)1566-1570
Number of pages5
JournalJournal of Medicinal Chemistry
Volume31
Issue number8
DOIs
StatePublished - Sep 1 1988

ASJC Scopus subject areas

  • Molecular Medicine
  • Drug Discovery

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