title: Novel 1,3-bis(aryloxy)propanes as leukotriene D4 antagonists.
abstract: The synthesis and structure-activity relationships of a number of 1,3-bis(aryloxy)propanes, which are in vivo antagonists of LTD4 in the guinea pig, are described. One of these compounds, 4 (Wy-44,329), was not only approximately equipotent with the standard 1 (FPL 55712) in the LTC4 (ID50 = 0.17 and 0.23 mg/kg iv, respectively) and LTD4 (ID50 = 0.11 and 0.15 mg/kg iv, respectively) challenge models but also possessed greater potency in the ovalbumin challenge model (ID50 = 0.47 mg/kg and 4.1 mg/kg iv, respectively) and a longer duration of action. This compound was a competitive LTD4 antagonist on guinea pig ileum (pA2 = 9.4) and possessed mediator release (rat PCA, ID50 = 0.26 mg/kg iv) and 5-lipoxygenase (IC50 = 32 microM vs. 5-HETE) inhibitory activities.
mesh_terms: D000818:Animals; D006168:Guinea Pigs; D007202:Indicators and Reagents; D009682:Magnetic Resonance Spectroscopy; D009119:Muscle Contraction / Q000187:drug effects; D009130:Muscle, Smooth / Q000502:physiology; D010647:Phenyl Ethers / Q000138:chemical synthesis* / Q000494:pharmacology; D013189:SRS-A / Q000037:antagonists & inhibitors* / Q000138:chemical synthesis; D013055:Spectrophotometry, Infrared; D013329:Structure-Activity Relationship
chemical_list: D007202:Indicators and Reagents; D010647:Phenyl Ethers; D013189:SRS-A; C050494:Wy 44329