Heterocyclyl-substituted dihydroquinazolines and their use as antiviral agents

A compound of the formula

• in which
• represents a single or double bond,
• R1 represents hydrogen, amino, alkyl, alkoxy, alkylamino, alkylthio, cyano, halogen, nitro or trifluoromethyl,
• R2 represents hydrogen, alkyl, alkoxy, alkylamino, alkylthio, cyano, halogen, nitro or trifluoromethyl,
• R3 represents amino, alkyl, alkoxy, alkylamino, alkylthio, cyano, halogen, nitro, trifluoromethyl, alkylsulphonyl or alkylaminosulphonyl
• or
• one of the radicals R1, R2 and R3 represents hydrogen, alkyl, alkoxy, cyano, halogen, nitro or trifluoromethyl and the other two together with the carbon atoms to which they are attached form a 1,3-dioxolane, a cyclopentane ring or a cyclohexane ring,
• R4 represents hydrogen or alkyl,
• R5 represents hydrogen, alkyl, alkoxy, formyl, carboxyl, alkylcarbonyl, alkoxycarbonyl, trifluoromethyl, halogen, cyano, hydroxyl, amino, alkylamino, aminocarbonyl or nitro,
• where alkyl may be substituted by 1 to 3 substituents, where the substituents are selected independently of one another from the group consisting of halogen, amino, alkylamino, hydroxyl and aryl,
• R6 represents hydrogen, alkyl, alkoxy, formyl, carboxyl, alkylcarbonyl, alkoxycarbonyl, trifluoromethyl, halogen, cyano, hydroxyl, amino, alkylamino, aminocarbonyl or nitro,
• where alkyl may be substituted by 1 to 3 substituents, where the substituents are selected independently of one another from the group consisting of halogen, amino, alkylamino, hydroxyl and aryl
• or
• R5 and R6 together with the carbon atoms to which they are attached form a 1,3-dioxolane, a cyclopentane ring or a cyclohexane ring,
• R7 represents hydrogen or alkyl,
• R8 represents hydrogen, alkyl, alkoxy, alkylamino, alkylthio, fornyl, carboxyl, aminocarbonyl, alkylaminocarbonyl, alkylcarbonyl, alkoxycarbonyl, trifluoromethyl, halogen, cyano, hydroxyl, nitro or a 5- to 7-membered heterocycle which is attached via nitrogen,
• R9 represents hydrogen, alkyl, alkoxy, alkylthio, formyl, carboxyl, alkylcarbonyl, alkoxycarbonyl, trifluoromethyl, halogen, cyano, hydroxyl or nitro,
• R10 represents hydrogen, alkyl, alkoxy, alkylthio, formyl, carboxyl, alkylcarbonyl, alkoxycarbonyl, trifluoromethyl, halogen, cyano, hydroxyl or nitro,
• or a salt, a solvate or a solvate of a salt thereof.