(arylsulfonamido- and pyridyl-)-substituted carboxylic acids and

Abstract

Disclosed are the compounds of formula ##STR1## wherein A represents lower alkylene; B represents oxygen, sulfur, lower alkylene, lower alkylene interrupted by oxygen, sulfur, sulfinyl or sulfonyl, (oxy-, sulfinyl-, sulfonyl- or thio)-lower alkylene, lower alkenylene, phenylene or a direct bond; M represents lower alkylene, lower alkylene interrupted by oxygen, sulfur, sulfinyl or sulfonyl, (oxy-, sulfinyl, sulfonyl- or thio)-lower alkylene, lower alkenylene or a direct bond; or one of A, B and M represents lower alkylidenylene and the other two independently represent lower alkylene; R represents hydrogen unless A, B or M represents lower alkylidenylene in which case R represents the second bond to the adjacent aklylidenylene unsaturated carbon atom; Het represents 1-imidazolyl, 3-pyridyl, or 1-imidazolyl or 3-pyridyl substituted by lower alkyl; Ar represents carbocyclic or heterocyclic aryl; pharmaceutically acceptable ester and amide derivatives thereof; the N-oxides of said compounds wherein Het represents optionally substituted pyridyl; the said compounds of formula I wherein COOH is replaced by 5-tetrazolyl; and the pharmaceutically acceptable salts; which are useful as thromboxane synthetase inhibitors and thromboxane receptor antagonists.