abstract |
The present invention relates to: 1. New substituted hexahydro-1,2,4-triazinediones of the general formula I in which R¹ represents heteroaromatic radicals which are bonded via carbon and which are optionally substituted, X represents O, S, SO, SO₂ or -CR⁵ (CN) -, R² for one or more, identical or different radicals from the group hydrogen, halogen, nitro, alkyl, alkoxy, haloalkyl, haloalkoxy, alkylthio, haloalkylthio, R³ and R⁴ independently of one another represent hydrogen, optionally substituted alkyl, alkenyl, alkynyl, aralkyl, R⁵ represents hydrogen or alkyl, except for compounds in which X is -CR⁵ (CN) - and R¹ is thienyl, Processes for their preparation, intermediates for carrying out these processes and their production, and their use for controlling parasitic protozoa, in particular coccidia and fish parasites. |