Dipole moment in relation to hydrogen receptor histamine antagonist activity for cimetidine analogs
摘要:
The activities of a series of H2 receptor histamine antagonists structurally related to cimetidine (1) have been compared to investigate the effect of replacing the cyanoguanidine moiety by other neutral, dipolar groups. Antagonist activity, as measured in vitro on the histamine-stimulated guinea pig right atrium, was found to be very sensitive to relatively minor structural changes. Differences in H2 antagonist activity are accounted for by dipole moment orientation and lipophilicity and are rationalized in terms of an optimum requirement for alignment of a hydrogen-bonding moiety in the antagonist with respect to the receptor and desolvation effects at the receptor. The most active compound in the series is the 2-amino-3-nitropyrrole derivative 5, which combines a near-optimal dipole orientation with high lipophilicity.
2,3-Unsaturated nitrogen-containing heterocyclic compounds with a 3-nitro group and a 2-heterocyclyl alkylamino group. The alkyl group of 2-position substituents is preferably interrupted by sulfur or oxygen. The compounds of the invention are preferably dihydropyrroles or tetrahydropyridines or pyrimidines. The compounds of the invention are histamine H.sub.2 -receptor antagonists.
The dielectric properties of seven polar amidine-containing compounds of biological interest
作者:Rodney C. Young、C.Robin Ganellin、Michael J. Graham、Michael L. Roantree、Edward H. Grant
DOI:10.1016/s0040-4039(00)94768-3
日期:1985.1
The static permittivities of seven polar molecules of biologicalinterest have been determined in water and ethane diol, and estimates have been made of their effective dipole moments.
在水和乙二醇中已经确定了七个具有生物学意义的极性分子的静电电容,并对其有效偶极矩进行了估算。
2-thiazolyl, oxazolyl, triazolyl and thiadiazolyl
申请人:SmithKline & French Laboratories Limited
公开号:US04656176A1
公开(公告)日:1987-04-07
2,3-Unsaturated nitrogen-containing heterocyclic compounds with a 3-nitro group and a 2-heterocyclyl alkylamino group. The alkyl group of 2-position substituents is preferably interrupted by sulfur or oxygen. The compounds of the invention are preferably dihydropyrroles or tetrahydropyrridines or pyrimidines. The compounds of the invention are histamine H.sub.2 -receptor antagonists.
Nitro-substituted dihydropyrroles and tetrahydropyridines, compositions,
申请人:Smith Kline & French Laboratories Limited
公开号:US04405624A1
公开(公告)日:1983-09-20
2,3-Unsaturated nitrogen-containing heterocyclic compounds with a 3-nitro group and a 2-heterocyclyl alkylamino group. The alkyl group of 2-position substituents is preferably interrupted by sulfur or oxygen. The compounds of the invention are preferably dihydropyrroles or tetrahydropyrridines or pyrimidines. The compounds of the invention are histamine H.sub.2 -receptor antagonists.
2-Thiazolyl, isothiazolyl, oxazolyl and isoxazolyl
申请人:Smith Kline & French Laboratories Limited
公开号:US04525477A1
公开(公告)日:1985-06-25
2,3-Unsaturated nitrogen-containing heterocyclic compounds with a 3-nitro group and a 2-heterocyclyl alkylamino group. The alkyl group of 2-position substituents is preferably interrupted by sulfur or oxygen. The compounds of the invention are preferably dihydropyrroles or tetrahydropyrridines or pyrimidines. The compounds of the invention are histamine H.sub.2 -receptor antagonists.