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.[1] DMNPC has four stereoisomers, each of which has different binding affinities, with the 3S,4S enantiomer having the highest overall activity. The 3R,4S enantiomer demonstrates the highest selectivity for 5-HTT.
In animal studies, DMNPC exhibits similar potency as fluoxetine, but with greater activity for DAT and NET. N-Demethylation of DMNPC has shown to produce a 3-fold increase in potency for 5-HTT.[1] SynthesisA racemic mixture of DMNPC can be synthesized from freebase arecoline in a grignard reaction with 2-naphthylmagnesium bromide. Further reactions and separation methods can be used to produce enantiomerically pure products.[1] A substantially simpler method that ablates the carbomethoxy ester substituent has been demonstrated by D. Koch.[2] See also
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