title: Development of a novel series of (2-quinolinylmethoxy)phenyl-containing compounds as high-affinity leukotriene receptor antagonists. 1. Initial structure-activity relationships.
abstract: This series of reports describes the development of orally active, highly potent, specific antagonists of the peptidoleukotrienes containing a (2-quinolinylmethoxy)phenyl moiety. Described in this first report are the structure-activity relationships that led to a more than a 20-fold improvement of the potency and selectivity of the initial chemical lead (RG 5901). From this series of compounds, RG 7152 (16) was identified and selected for further evaluation in the clinic as an antiasthmatic agent. Compound 16 competitively inhibits [3H]LTD4 binding to membranes from guinea pig lung (Ki = 38 +/- 6 nM) and the spasmogenic activity of LTC4, LTD4, and LTE4 in parenchymal lung strips from guinea pigs. Unlike the original lead (RG 5901), compound 16 does not inhibit 5-lipoxygenase from guinea pig PMNs. Following oral administration to guinea pigs, 16 blocks LTD4-induced dermal permeability (ED50 = 6.9 mg/kg), LTD4-induced bronchoconstriction (ED50 = 1.1 mg/kg), antigen-induced bronchoconstriction (ED50 = 2.5 mg/kg), and anaphylactic-induced mortality (ED50 = 16 mg/kg). These studies on structure-activity relationships indicate that there is a requirement for an acidic function and the presence of the (2-quinolinylmethoxy)phenyl moiety in a specific geometric arrangement.
authors.affiliation: Rorer Central Research, Horsham, Pennsylvania 19044.
authors.forename: R D
authors.initials: RD
authors.lastname: Youssefyeh
authors.forename: E
authors.initials: E
authors.lastname: Magnien
authors.forename: T D
authors.initials: TD
authors.lastname: Lee
authors.forename: W K
authors.initials: WK
authors.lastname: Chan
authors.forename: C J
authors.initials: CJ
authors.lastname: Lin
authors.forename: R A
authors.initials: RA
authors.lastname: Galemmo
authors.forename: W H
authors.initials: WH
authors.lastname: Johnson
authors.forename: J
authors.initials: J
authors.lastname: Tan
authors.forename: H F
authors.initials: HF
authors.lastname: Campbell
authors.forename: F C
authors.initials: FC
authors.lastname: Huang
mesh_terms: D000818:Animals; D001393:Azoles / Q000138:chemical synthesis*; D001993:Bronchodilator Agents / Q000138:chemical synthesis*; D055598:Chemical Phenomena; D002621:Chemistry; D006168:Guinea Pigs; D006912:Hydroxyquinolines / Q000138:chemical synthesis* / Q000494:pharmacology; D020024:Leukotriene Antagonists; D008168:Lung / Q000187:drug effects / Q000378:metabolism; D010647:Phenyl Ethers / Q000138:chemical synthesis* / Q000378:metabolism / Q000494:pharmacology; D011804:Quinolines / Q000138:chemical synthesis* / Q000378:metabolism / Q000494:pharmacology; D011971:Receptors, Immunologic / Q000187:drug effects* / Q000378:metabolism; D018102:Receptors, Leukotriene B4; D013329:Structure-Activity Relationship; D013777:Tetrazoles / Q000138:chemical synthesis* / Q000494:pharmacology
chemical_list: D001393:Azoles; D001993:Bronchodilator Agents; D006912:Hydroxyquinolines; D020024:Leukotriene Antagonists; D010647:Phenyl Ethers; D011804:Quinolines; D011971:Receptors, Immunologic; D018102:Receptors, Leukotriene B4; D013777:Tetrazoles; C049740:alpha-pentyl-3-(2-quinolinylmethoxy)benzenemethanol; C063535:RG 7152