(Quinoxaline - 2 - y - 1,4 - dioxide) - (ethene - 1 '- y) - ketones, a method for their preparation and pharmaceutical compositions containing these compounds as well as beifuttermittel, feed means concentrates and feedstuffs

摘要

The invention relates to novel quinoxaline-2-yl ethenyl ketones, their preparation and compositions containing them. The novel quinoxaline-2-yl ethenyl ketones of the general formula I IMAGE (I) wherein R1 represents an aryl group or a heterocyclic group comprising one or more nitrogen and/or oxygen and/or sulfur atoms wherein both the aryl and heterocyclic groups are optionally substituted by one or more identical or different substituents, R2 stands for a hydrogen atom or a C1-4 alkyl group, are prepared by reacting an acetylquinoxaline derivative of the general formula II IMAGE (II) wherein R2 is as stated above, with an aldehyde of the general formula III R1-CHO (III) wherein R1 is as stated above. The novel compounds of the general formula I possess valuable antibacterial effect and promote the growth of animals. Thus, the novel compounds can be incorporated in animal feeds.