Synthesis and Monoamine Transporter Binding Properties of 2,3-Cyclo Analogues of 3β-(4‘-Aminophenyl)-2β-tropanemethanol
摘要:
A series of cyclo-3 beta-(4-aminophenyl)-2 beta-tropanemethanol analogues (5a-m) possessing varying linker groups between the 2- and 3-position on the tropane ring were synthesized and evaluated for their monoamine transporter binding properties. The results show that binding to the dopamine and serotonin transporters (DAT and 5-HTT) is highly dependent on the specific linker used. Cyclo-3 beta-(4-aminophenyl)-2 beta-tropanemethanol pimelic acid ester/amide (5b) had an IC50 of 3.8 nM at the DAT. Cyclo-3 beta-(4-aminophenyl)2 beta-tropanemethanol sebacic acid ester/amide (5e) had a K-i of 1.9 nM at the 5-HTT and was 68- and 737-fold selective for the 5-HTT relative to the DAT and NET. Small changes to the size as well as the electrostatic and hydrophobic properties of the 2,3-linker in 5b or 5e led to much less potent analogues at all three transporters. These results suggest that the high affinity for 5b and 5e at the DAT and 5-HTT may be due to their specific conformational properties.
Synthesis and Monoamine Transporter Binding Properties of 2,3-Cyclo Analogues of 3β-(4‘-Aminophenyl)-2β-tropanemethanol
作者:F. Ivy Carroll、Bruce E. Blough、Xiaodong Huang、Zhe Nie、S. Wayne Mascarella、Jeffrey Deschamps、Hernán A. Navarro
DOI:10.1021/jm060287w
日期:2006.7.1
A series of cyclo-3 beta-(4-aminophenyl)-2 beta-tropanemethanol analogues (5a-m) possessing varying linker groups between the 2- and 3-position on the tropane ring were synthesized and evaluated for their monoamine transporter binding properties. The results show that binding to the dopamine and serotonin transporters (DAT and 5-HTT) is highly dependent on the specific linker used. Cyclo-3 beta-(4-aminophenyl)-2 beta-tropanemethanol pimelic acid ester/amide (5b) had an IC50 of 3.8 nM at the DAT. Cyclo-3 beta-(4-aminophenyl)2 beta-tropanemethanol sebacic acid ester/amide (5e) had a K-i of 1.9 nM at the 5-HTT and was 68- and 737-fold selective for the 5-HTT relative to the DAT and NET. Small changes to the size as well as the electrostatic and hydrophobic properties of the 2,3-linker in 5b or 5e led to much less potent analogues at all three transporters. These results suggest that the high affinity for 5b and 5e at the DAT and 5-HTT may be due to their specific conformational properties.