Aromatic thioethers

Abstract

Novel asymmetric thioethers of the formula ##STR1## in which the general symbols have the following meanings: R.sup.0 represents hydrogen or C.sub.1-7 -alkanoyl, R.sup.1 represents C.sub.1-3 -alkyl which may be substituted by one or more halogen atoms having an atomic number of at most 17, R.sup.2 represents an aliphatic radical having from 5 to 15 carbon atoms, A represents ethylene, a single bond or vinylene, B.sup.1 represents C.sub.1-7 -alkylene or phenylene, B.sup.2 represents a single bond, ethylene or phenylene, and M represents an aromatic radical of the partial formula ##STR2## in which the symbols have the following meanings: R.sup.3 represents hydrogen or C.sub.1-4 -alkyl, X represents NH, O, S or if R.sup.4 represents hydrogen, a single bond, one of the symbols R.sup.4 and R.sup.5 represents hydrogen and the other represents the group --CO--R.sup.6, or R.sup.4 and R.sup.5 together represent the radical --CO--C(R.sup.6).dbd.C(R.sup.7)--or--CO--C(R.sup.7).dbd.C(R.sup.6)--or R.sup.4 R.sup.5, together with X, represent the radical --N.dbd.C(R.sup.8)--C(R.sup.6).dbd.CH--, in which R.sup.6 represents --(CH.sub.2).sub.b --COOR.sup.3 (in which b=0 to 2) R.sup.7 represents hydrogen or C.sub.1-4 -alkyl and R.sup.8 represents hydrogen, methyl, mythoxy or halogen, and their salts are active as leucotriene antagonists since they eliminate the contractions of smooth muscles brought about by leucotrienes, and are therefore suitable for the treatment of allergic, especially asthmatic, conditions.

Dependencies are inferred from the claim text.