Hoffmann-la Roche Inc.

Werner Schiestl

Helmut Link

Wilhelm Klotzer

Renate Mussner

Nicolas Singewald

The imidazolium compounds of the formula ##STR1## wherein Q is arylene or heteroarylene, the group --NR.sup.1 R.sup.2 is a basic amino group, R.sup.3 is lower alkylthio, lower alkoxy or the group --(A).sub.n --Ra, R.sup.4 is a saturated or partially unsaturated lower hydrocarbon group, a basic amino group, --N.dbd.CRc--Rb, --CHRcRd, --NH--CHRcRd, --NH--CO--Re or --CHRc--CO--Re, R.sup.5 is hydrogen, lower alkyl, lower hydroxyalkyl, lower alkoxyalkyl, lower haloalkyl, aryl or a fused benzene ring, R.sup.6 is hydrogen or lower alkyl, Ra and Rb independently are aryl, heteroaryl or a basic amino group, Rc is hydrogen or lower alkyl, Rd is aryl or heteroaryl, Re is hydrogen, a saturated or partially unsaturated lower hydrocarbon group optionally attached via an oxygen atom, or an aryl, heteroaryl or basic amino group optionally attached via a lower alkyl group, A is vinylene or lower alkylene, n is the integer 0 or 1, the dotted line is an additional double bond and the symbol Y.sup.- is a pharmaceutically acceptable anion, and their pharmaceutically acceptable acid addition salts, which possess valuable pharmacological properties are described. In particular, they possess antibacterial, antimycotic, protozoacidal and/or anthelmintic properties and are especially active against parasitic protozoa and worms. The compounds of formula I can be prepared according to known methods.

1,3-disubstituted/imidazolium salts

The imidazolium compounds of the formula ##STR1## wherein the various substituents are defined hereinbelow and their pharmaceutically acceptable acid addition salts, which possess valuable pharmacological properties are described. In particular, they possess antibacterial, antimycotic, protozoacidal and/or anthelmintic properties and are especially active against parasitic protozoa and worms. The compounds of formula I can be prepared according to known methods.

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Innsbruck, Austria

Werner Schiestl