- Development of 3-phenyltropane analogues with high affinity for the dopamine and serotonin transporters and low affinity for the norepinephrine transporter
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Previous studies showed that the mixed monoamine transporter inhibitor (6, RTI-112) reduced cocaine self-administration at a high level of serotonin transporter (5-HTT) occupancy with no detectable dopamine transporter (DAT) occupancy. In this study, a series of 3β-(substituted phenyl)tropane- 2β-carboxylic acid methyl esters (7a-g), 3β-(4-methoxyphenyl)tropane- 2β-carboxylic acid esters (8a-j), and 3β-(4-methoxyphenyl)-2β-[3- (4′-methylphenyl)isoxazol-5-yl]tropane (9) were synthesized and evaluated for their monoamine transporter binding affinities to identify potent and selective compounds for both the DAT and 5-HTT relative to the norepinephrine transporter (NET). A number of compounds showed high binding affinities for both the DAT and 5-HTT and low affinity for the NET. 3β-(4-Methoxyphenyl) tropane-2β-carboxylic acid 2-(3-iodo-4-aminophenyl)ethyl ester (8i) with an IC50 value of 2.5 nM for the DAT and Ki values of 3.5 and 2040 nM for the 5-HTT and NET, respectively, is the most potent and selective compound for the DAT and 5-HTT relative to the NET in this study.
- Jin, Chunyang,Navarro, Hernán A.,Carroll, F. Ivy
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experimental part
p. 8048 - 8056
(2009/12/07)
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