The invention relates to pyridin-2-one compounds of general formula (I) in which A represents a 4- to 6-membered hydrocarbon chain that can have 1 or 2 methyl groups as substituents, wherein 1 or 2 carbon atoms can be replaced by oxygen, a carbonyl group or sulfur, and the hydrocarbon chain can have a double bond or a triple bond; R1, R2, R3 and R4 have the meanings as cited in the claims and in the description. The invention also relates to the tautomers of compounds I and the physiologically acceptable salts of the compounds I and their tautomers.The invention also relates to the use of these compounds for treating diseases that respond to the influence of dopamine D3 receptor antagonists or agonists.