N,O-Dimethyl-4-(2-naphthyl)piperidine-3-carboxylate

N,O-Dimethyl-4β-(2-naphthyl)piperidine-3β-carboxylate (DMNPC) is a piperidine based stimulant drug which is synthesised from arecoline. It is similar to nocaine in chemical structure, and has two and a half times more activity than cocaine as a dopamine reuptake inhibitor. However it is also a potent serotonin reuptake inhibitor, with similar affinity to fluoxetine. It is a structural isomer of another potent dopamine reuptake inhibitor, HDMP-28.

Clearly it is not just the SS enantiomer of the title compound that is an active MAT inhibitor.

Effect of N-demethylation

Interestingly, for the SR enantiomer, increased DAT affinity is seen upon demethylation.

This is the same choice of isomer used in the production of Paxil.

See also

References

HDMP-28

HDMP-28 or methylnaphthidate is a piperidine based stimulant drug, closely related to methylphenidate, but with the benzene ring replaced by naphthalene. It is a potent dopamine reuptake inhibitor, with several times the potency of methylphenidate and a short duration of action, and is a structural isomer of another potent dopamine reuptake inhibitor, N,O-Dimethyl-4-(2-naphthyl)piperidine-3-carboxylate.

Most of the TMP analogs of HDMP-28 have SERT Ki values in the range >10,000 and so are selective for dopamine and noradrenaline reuptake, with little or no effect on serotonin. HDMP-28 also has high affinity to SERT, and so behaves as a triple reuptake inhibitor.

D.R. = Discrimination Ratio = [3H]DA ÷ [3H]CFT.

A low D.R. = addictive, whereas a high D.R. = low propensity for self-administration.

Legality

HDMP-28 is illegal in Switzerland as of December 2015.

See also