Structural Features Important for .sigma.1 Receptor Binding
摘要:
Two problems that have hampered a receptor research are (i) a lack of high-affinity agents and iii) the recent identification Of multiple populations of a receptors (i.e., sigma(1) and sigma(2) sites). Recently, several high-affinity sigma ligands have been identified, and the term superpotent sigma ligands has been coined to describe agents with K-i values of <1 nM. We have previously shown that appropriately N-substituted phenylalkylamines bind at a receptors with high affinity. In the present investigation, we examine the structure-affinity relationships of these phenylalkylamine derivatives for sigma binding and describe some of the first superpotent sigma(1) ligands. A binding model was developed to account for the structural features of the phenylalkylamines that appear to be important for the interaction of these agents with sigma(1) sites.
Identification and exploitation of the .sigma.-opiate pharmacophore
摘要:
Certain benzomorphan ''sigma-opiates'' such as N-allylnormetazocine (NANM) bind at sigma receptors with modest affinity and with little selectivity (i.e., they also bind at phencyclidine or PCP sites). In order to identify the primary pharmacophore of the benzomorphans, we prepared several amine-substituted derivatives of 1-phenyl-2-aminopropane. Several simple alkyl-substituted analogues were shown to bind at sigma sites with affinities comparable to that of NANM itself; among these was the N-benzyl derivative 9 (K(i) = 117 nM). Lengthening the spacer between the terminal amine and the phenyl group from one to five methylene units resulted in a significant increase in affinity (e.g. 15, K(i) = 6.3 nM). In addition, unlike the benzomorphans, these phenalkylamines do not bind at PCP sites. The results of the present study reveal that (a) the 1-phenyl-2-aminopropane nucleus of the benzomorphans is sufficient for binding at sigma sites provided that the terminal amine is not a primary amine and that (b) introduction of (phenylalkyl)amine substituents affords compounds that represent a new class of high-affinity sigma-selective agents.
New bronchospasmolytic compounds and process for their preparation
申请人:Aktiebolaget Draco
公开号:EP0390762B1
公开(公告)日:1994-01-19
Identification and exploitation of the .sigma.-opiate pharmacophore
作者:Richard A. Glennon、J. Doyle Smith、Abd M. Ismaiel、Mahmoud El-Ashmawy、George Battaglia、James B. Fischer
DOI:10.1021/jm00107a033
日期:1991.3
Certain benzomorphan ''sigma-opiates'' such as N-allylnormetazocine (NANM) bind at sigma receptors with modest affinity and with little selectivity (i.e., they also bind at phencyclidine or PCP sites). In order to identify the primary pharmacophore of the benzomorphans, we prepared several amine-substituted derivatives of 1-phenyl-2-aminopropane. Several simple alkyl-substituted analogues were shown to bind at sigma sites with affinities comparable to that of NANM itself; among these was the N-benzyl derivative 9 (K(i) = 117 nM). Lengthening the spacer between the terminal amine and the phenyl group from one to five methylene units resulted in a significant increase in affinity (e.g. 15, K(i) = 6.3 nM). In addition, unlike the benzomorphans, these phenalkylamines do not bind at PCP sites. The results of the present study reveal that (a) the 1-phenyl-2-aminopropane nucleus of the benzomorphans is sufficient for binding at sigma sites provided that the terminal amine is not a primary amine and that (b) introduction of (phenylalkyl)amine substituents affords compounds that represent a new class of high-affinity sigma-selective agents.
Structural Features Important for .sigma.1 Receptor Binding
作者:Richard A. Glennon、Seth Y. Ablordeppey、Abd M. Ismaiel、Mahmoud B. El-Ashmawy、James B. Fischer、Kathleen Burke Howie
DOI:10.1021/jm00034a020
日期:1994.4
Two problems that have hampered a receptor research are (i) a lack of high-affinity agents and iii) the recent identification Of multiple populations of a receptors (i.e., sigma(1) and sigma(2) sites). Recently, several high-affinity sigma ligands have been identified, and the term superpotent sigma ligands has been coined to describe agents with K-i values of <1 nM. We have previously shown that appropriately N-substituted phenylalkylamines bind at a receptors with high affinity. In the present investigation, we examine the structure-affinity relationships of these phenylalkylamine derivatives for sigma binding and describe some of the first superpotent sigma(1) ligands. A binding model was developed to account for the structural features of the phenylalkylamines that appear to be important for the interaction of these agents with sigma(1) sites.