Tropoxane is an aryloxytropane derivative drug developed by Organix Inc, which acts as a stimulant and potent dopamine and serotonin reuptake inhibitor. It is an analogue of dichloropane where the amine nitrogen has been replaced by an oxygen ether link (at the bridgehead position), demonstrating that the amine nitrogen is not required for DAT binding and reuptake inhibition.

P. Meltzer et al. made some 8-thiabicyclo(3.2.1)octanes recently (2007).

For SAR purposes, a table has been included that lists some of these compounds.

It had been hypothesized that transporter binding of the tropanes might include ionic bonding of the central tropane nitrogen. But it turned out that at this site neither ionic nor hydrogen bonding is a prerequisite for potent monoamine reuptake inhibition. Oxa- and thia-analogs of RTI-111 are potent inhibitors, and even an N-replacement by methylene holds the potency within the same magnitude. However, N-quaternisation ('N-dimethyl') considerably reduces DAT affinity.




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