Document Report Card

ID: ALA1131435

Journal: J Med Chem

Title: Biphenylsulfonamide endothelin antagonists: structure-activity relationships of a series of mono- and disubstituted analogues and pharmacology of the orally active endothelin antagonist 2'-amino-N- (3,4-dimethyl-5-isoxazolyl)-4'-(2-methylpropyl)[1, 1'-biphenyl]-2-sulfonamide (BMS-187308).

Authors: Murugesan N, Gu Z, Stein PD, Bisaha S, Spergel S, Girotra R, Lee VG, Lloyd J, Misra RN, Schmidt J, Mathur A, Stratton L, Kelly YF, Bird E, Waldron T, Liu EC, Zhang R, Lee H, Serafino R, Abboa-Offei B, Mathers P, Giancarli M, Seymour AA, Webb ML, Hunt JT.

Abstract: Substitution at the ortho position of N-(3,4-dimethyl-5-isoxazolyl) benzenesulfonamide led to the identification of the biphenylsulfonamides as a novel series of endothelin-A (ETA) selective antagonists. Appropriate substitutions on the pendant phenyl ring led to improved binding as well as functional activity. A hydrophobic group such as isobutyl or isopropoxyl was found to be optimal at the 4'-position. Introduction of an amino group at the 2'-position also led to improved analogues. Combination of the optimal 4'-isobutyl substituent with the 2'-amino function afforded an analogue (20, BMS-187308) with improved ETA binding affinity and functional activity. Compound 20 also has good oral activity in inhibiting the pressor effect caused by an ET-1 infusion in rats. Doses of 10 and 30 micromol/kg iv 20 attenuated the pressor responses due to the administration of exogenous ET-1 to conscious monkeys, indicating that the compound inhibits the in vivo activity of endothelin-1 in nonhuman primates.

CiteXplore: 9857090

DOI: 10.1021/jm970872k