Secondary Amine Analogs of 3.beta.-(4'-Substituted phenyl)tropane-2.beta.-carboxylic Acid Esters and N-Norcocaine Exhibit Enhanced Affinity for Serotonin and Norepinephrine Transporters
摘要:
N-Norcocaine (2) and six N-nor-3 beta-(4'-substituted phenyl)tropane-2 beta-carboxylic acid esters (4a-f) were synthesized by N-demethylation of cocaine (1) and the appropriate 3 beta-(substituted phenyl)tropane analogues (3a-f) with alpha-chloroethyl chloroformate. Radioligand binding affinities of 2 and 4a-f at the DA, 5-HT, and NE transporter were measured and compared to those of 1 and 3a-f. N-Demethylation produced relatively small effects at the DA transporter. In contrast, 4-19-fold and 2-44-fold enhanced affinity at the serotonin and norepinephrine transporter resulted from demethylation. N-Nor-3 beta-(4'-iodophenyl)tropane-2 beta-carboxylic acid methyl ester (4d) with an IC50 = 0.36 nM showed the greatest affinity for the serotonin transporter. However, N-nor-3 beta-(4'-ethylphenyl)tropane-2 beta-carboxylic acid methyl ester (4e) showed the greatest selectivity for the serotonin transporter.
Cocaine and 3.beta.-(4'-Substituted phenyl)tropane-2.beta.-carboxylic Acid Ester and Amide Analogs. New High-Affinity and Selective Compounds for the Dopamine Transporter
作者:F. Ivy Carroll、Pravin Kotian、Ali Dehghani、Jeffrey L. Gray、Michael A. Kuzemko、Karol A. Parham、Philip Abraham、Anita H. Lewin、John W. Boja、Michael J. Kuhar
DOI:10.1021/jm00002a020
日期:1995.1
2 beta-carboxylic acid are highly potent and highly selective for the DA transporter. The isopropylesters of 3 beta-(4'-chlorophenyl)- and 3 beta-(4'-iodophenyl)tropane-2 beta-carboxylic acid also possess high DA affinity and show significant DA transporterselectivity. Similarly, the phenyl and isopropylester analogues of cocaine are much more selective for the DA transporter than cocaine. Tertiary