EP0882719A1 — Arylethenesulfonamide derivatives and drug composition containing the same

USPTO Abstract

Novel arylethenesulfonamide derivatives having a high affinity for drugs, especially endoserine receptors, and represented by general formula (I); pharmacologically acceptable salts thereof; and drugs comprising the same as the active ingredient, especially endoserine receptor antagonists, wherein Ar represents optionally substituted aryl or optionally substituted five- or six-membered heteroaryl; X represents oxygen, sulfur, or the group represented by -NH-; Y represents oxygen or sulfur; R 1 represents hydrogen, lower alkyl optionally substituted with halogeno, cycloalkyl, optionally substituted aryl, or optionally substituted five- or six-membered heteroaryl; R 2 represents lower alkyl, lower alkenyl, or lower alkynyl each optionally substituted with one to three groups selected among hydroxy, lower alkoxys, cycloakyls, halogens, carboxy, and lower alkoxycarbonyls; R 3 represents phenyl optionally substituted with one to four groups selected among optionally halogenated lower alkyls, lower alkoxys, halogens, lower alkylthios, lower alkylsulfinyls, lower alkanesulfonyls, carboxy, lower alkoxycarbonyls, and carbamoyl; and R 4 and R 5 are the same or different and each represents hydrogen or lower alkyl.