title: Novel 1,2,4-oxadiazoles and 1,2,4-thiadiazoles as dual 5-lipoxygenase and cyclooxygenase inhibitors.
abstract: A series of 1,2,4-oxadiazoles and 1,2,4-thiadiazoles containing a 2,6-di-tert-butylphenol substituent were prepared and evaluated as dual inhibitors of 5-lipoxygenase and cyclooxygenase in rat basophilic leukemia (RBL-1) cells. Several of these compounds show oral efficacy in the rat carrageenan footpad edema (CFE) and mycobacterium footpad edema (MFE) antiinflammatory models, without concomitant gastric ulceration. Structure-activity relationships are discussed. The best compounds (ID40 values in MFE of 3-8 mg/kg po) contain guanidine-derived substituents on the heterocyclic ring.
authors.affiliation: Department of Chemistry, Parke-Davis Pharmaceutical Research Division, Warner-Lambert Company, Ann Arbor, Michigan 48105.
authors.forename: P C
authors.initials: PC
authors.lastname: Unangst
authors.forename: G P
authors.initials: GP
authors.lastname: Shrum
authors.forename: D T
authors.initials: DT
authors.lastname: Connor
authors.forename: R D
authors.initials: RD
authors.lastname: Dyer
authors.forename: D J
authors.initials: DJ
authors.lastname: Schrier
mesh_terms: D000818:Animals; D000893:Anti-Inflammatory Agents; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000138:chemical synthesis*; D016861:Cyclooxygenase Inhibitors / Q000138:chemical synthesis* / Q000494:pharmacology; D004791:Enzyme Inhibitors / Q000138:chemical synthesis*; D016859:Lipoxygenase Inhibitors; D008297:Male; D010069:Oxadiazoles / Q000138:chemical synthesis* / Q000494:pharmacology; D051381:Rats; D017208:Rats, Wistar; D013329:Structure-Activity Relationship; D013830:Thiadiazoles / Q000138:chemical synthesis* / Q000494:pharmacology; D014407:Tumor Cells, Cultured / Q000187:drug effects / Q000378:metabolism
chemical_list: D000893:Anti-Inflammatory Agents; D000894:Anti-Inflammatory Agents, Non-Steroidal; D016861:Cyclooxygenase Inhibitors; D004791:Enzyme Inhibitors; D016859:Lipoxygenase Inhibitors; D010069:Oxadiazoles; D013830:Thiadiazoles