Structure-activity relationships for 2-substituted imidazoles as .alpha.2-adrenoceptor antagonists
摘要:
Several 2-[(1,4-benzodioxan-2-yl)alkyl]imidazoles were prepared and evaluated for their blocking activity and relative selectivity on presynaptic (alpha 2) and postsynaptic (alpha 1) receptors in the isolated rat vas deferens. 1-Ethyl-2-[(1,4-benzodioxan 2-yl)methyl]imidazole (13) was the most selective alpha 2-adrenoceptor antagonist of the series and was, for practical purposes, devoid of alpha 1-adrenoceptor antagonist activity. The lipophilicity of 13 (log D = 2.31) indicated that it would have an excellent chance to enter the central nervous system. Compound 13 was selected for clinical evaluation as an antidepressant agent.
Structure-activity relationships for 2-substituted imidazoles as .alpha.2-adrenoceptor antagonists
作者:Joan M. Caroon、Robin D. Clark、Arthur F. Kluge、Ronald Olah、David B. Repke、Stefan H. Unger、Anton D. Michel、Roger L. Whiting
DOI:10.1021/jm00348a012
日期:1982.6
Several 2-[(1,4-benzodioxan-2-yl)alkyl]imidazoles were prepared and evaluated for their blocking activity and relative selectivity on presynaptic (alpha 2) and postsynaptic (alpha 1) receptors in the isolated rat vas deferens. 1-Ethyl-2-[(1,4-benzodioxan 2-yl)methyl]imidazole (13) was the most selective alpha 2-adrenoceptor antagonist of the series and was, for practical purposes, devoid of alpha 1-adrenoceptor antagonist activity. The lipophilicity of 13 (log D = 2.31) indicated that it would have an excellent chance to enter the central nervous system. Compound 13 was selected for clinical evaluation as an antidepressant agent.
2-(1,4-Benzodioxan-2-ylalkyl)benzimidazoles useful as anti-depressants
申请人:Syntex (U.S.A.) Inc.
公开号:US04301171A1
公开(公告)日:1981-11-17
Compounds of the formula ##STR1## and the pharmaceutically acceptable, non-toxic salts thereof, wherein: R is hydrogen, lower alkyl, or benzyl; X is a substitution for hydrogen at any position in the benzene ring and is selected from the group consisting of lower alkyl, lower alkoxyl, benzyl and halo; m is an integer from 0 to 4; and n is an integer from 0 to 2; are novel. These compounds have been shown to be .alpha..sub.2 blockers, and are, therefore, anti-depressants.