Synthesis and Monoamine Transporter Binding Properties of 2,3-Diaryltropanes
摘要:
Synthetic procedures were developed for the synthesis of 2 beta,3 beta- and 2 alpha,3 alpha-diaryltropanes. These compounds are analogues of the 3-aryltropane-2 beta-carboxylic acid methyl ester class of monoamine uptake inhibitors, where the 2 beta-carbomethoxy group has been replaced by an aryl group. The compounds were evaluated for inhibition of radioligand binding at the dopamine, norepinephrine, and serotonin transporters (DAT, NET, and 5-HTT, respectively). The results showed that the replacement of the 2 beta-carbomethoxy group in the 3-aryltropane class with a 2 beta-aryl group led to compounds possessing very similar monoamine transporter binding properties. However, the 2 beta,3 beta-diaryltropanes tended to be more potent at the DAT and more selective for the DAT relative to the NET and 5-HTT. One of the most interesting compounds was 3 beta-(4-methylphenyl)-2 beta-(4-methylphenyl)tropane (3d), which showed an IC50 of 1.23 nM at the DAT with 289- and 185-fold selectivity for the DAT relative to the NET and 5-HTT. The 2 alpha,3 alpha-diaryltropanes were much less potent at all three transporters than 2 beta,3 beta-diaryltropanes.
Synthesis and Monoamine Transporter Binding Properties of 2,3-Diaryltropanes
摘要:
Synthetic procedures were developed for the synthesis of 2 beta,3 beta- and 2 alpha,3 alpha-diaryltropanes. These compounds are analogues of the 3-aryltropane-2 beta-carboxylic acid methyl ester class of monoamine uptake inhibitors, where the 2 beta-carbomethoxy group has been replaced by an aryl group. The compounds were evaluated for inhibition of radioligand binding at the dopamine, norepinephrine, and serotonin transporters (DAT, NET, and 5-HTT, respectively). The results showed that the replacement of the 2 beta-carbomethoxy group in the 3-aryltropane class with a 2 beta-aryl group led to compounds possessing very similar monoamine transporter binding properties. However, the 2 beta,3 beta-diaryltropanes tended to be more potent at the DAT and more selective for the DAT relative to the NET and 5-HTT. One of the most interesting compounds was 3 beta-(4-methylphenyl)-2 beta-(4-methylphenyl)tropane (3d), which showed an IC50 of 1.23 nM at the DAT with 289- and 185-fold selectivity for the DAT relative to the NET and 5-HTT. The 2 alpha,3 alpha-diaryltropanes were much less potent at all three transporters than 2 beta,3 beta-diaryltropanes.
Synthesis and transporter binding properties of (R)-2β,3β- and (R)-2α,3α-diaryltropanes
作者:Songchun Jiang、An-Chih Chang、Philip Abraham、Michael J. Kuhar、F.Ivy Carroll
DOI:10.1016/s0960-894x(98)00673-8
日期:1998.12
(R)-2-Aryl-2-tropinone (9) was synthesized from (R)-2-carbomethoxy-3-tropinone (5) and was used as the key intermediate for the synthesis of (R)-2 beta,3 beta- and (R)-2 alpha,3 alpha-diaryltropanes. Inhibition of radioligand binding studies at the dopamine, serotonin, and norepinephrine transporters showed that the (R)-3 beta-(4-methylphenyl)-2 beta-phenyltropane (3b, RTI-422) possessed an IC50 value of 1.96 nM at the dopamine transporter and was highly selective for this transporter relative to the serotonin and norepinephrine transporters. (C) 1998 Elsevier Science Ltd. All rights reserved.