N-[(Arylmethoxy)phenyl] and N-[(arylmethoxy)naphthyl] sulfonamides: potent orally active leukotriene d4 antagonists of novel structure
摘要:
Two series of compounds, N-[(arylmethoxy)phenyl] sulfonamides and N-[(arylmethoxy)naphthyl] sulfonamides, were prepared as leukotriene D4 (LTD4) antagonists. In the phenyl series, N-[3-(2-quinolinylmethoxy)phenyl]-trifluoromethanesulfonamide (Wy-48,252, 16) was the most potent inhibitor of LTD4-induced bronchoconstriction in the guinea pig. With an intragastric ID50 of 0.1 mg/kg (2-h pretreatment), 16 was 300 times more potent than LY-171,883. Compound 16 also intragastrically inhibited ovalbumin-induced bronchoconstriction in the guinea pig with an ID50 of 0.6 mg/kg. In vitro against LTD4-induced contraction of isolated guinea pig trachea pretreated with indomethacin and L-cysteine, 16 produced a pKB value of 7.7. In the rat PMN assay 16 inhibited both 5-lipoxygenase and cyclooxygenase (IC50's = 4.6 and 3.3 microM). In the naphthyl series, N-[7-(2-quinolinylmethoxy)-2-naphthyl]trifluoromethanesulfonamide (Wy-48,090, 47) in addition to potent LTD4 antagonist activity (on isolated guinea pig trachea 47 had a pKB value of 7.04) also had antiinflammatory activity (63% inhibition at 50 mg/kg in the rat carrageenan paw edema assay and 34% inhibition of TPA-induced inflammation at 1 mg/ear in the mouse ear edema model). Perhaps the antiinflammatory activity of 47 was due to its additional activity of inhibiting both 5-lipoxygenase and cyclooxygenase enzymes (IC50's = 0.23 and 11.9 microM, respectively, in rat PMN).
Neue substituierte Phenylsulfonamide können durch Umsetzung von entsprechenden Aminen mit Sulfonhalogeniden hergestellt werden. Die neuen Verbindungen können als Wirkstoffe zur Hemmung von enzymatischen Reaktionen und zur Hemmung der Thrombozytenaggregationen eingesetzt werden.