Process for preparing tetrazole-substituted anthranilic acid diamide derivatives by reacting benzoxazinones with amines

Process for preparing a compound of formula (I)

• in which
• R1, R3 independently of one another represent hydrogen, or represent C1-C6-alkyl, C1-C6-alkoxy, C2-C6-alkenyl, C2-C6-alkynyl or C3-C6-cycloalkyl which are each optionally mono- or polysubstituted by identical or different halogen or nitro substituents,
• R2 represents C1-C6-alkyl, C3-C6-cycloalkyl, C1-C6-haloalkyl, C1-C6-halocycloalkyl, C2-C6-alkenyl, C2-C6-haloalkenyl, C2-C6-alkynyl, C2-C6-haloalkynyl, C1-C4-alkoxy, C1-C4-haloalkoxy, C1-C4-alkylthio, C1-C4-alkylsulphinyl, C1-C4-alkylsulphonyl, C1-C4-haloalkylthio, C1-C4-haloalkylsulphinyl, C1-C4-haloalkylsulphonyl, halogen, cyano, nitro, alkylamino, dialkylamino, cycloalkylamino or C3-C6-trialkylsilyl,
• R4 represents hydrogen, halogen, cyano, nitro, C1-C4-alkyl, C1-C4-haloalkyl, C2-C6-alkenyl, C2-C6-haloalkenyl, C2-C6-alkynyl, C1-C4-alkoxy, C1-C4-haloalkoxy, SF5, C1-C4-alkylthio, C1-C4-alkylsulphinyl, C1-C4-alkylsulphonyl, C1-C4-haloalkylthio, C1-C4-haloalkylsulphinyl, C1-C4-haloalkylsulphonyl, C1-C4-alkylamino, di-(C1-C4-alkyl)amino, C3-C6-cycloalkylamino, (C1-C4-alkoxy)imino, (C1-C4-alkyl) (C1-C4-alkoxy)imino, (C1-C4-haloalkyl)(C1-C4-cyano, nitro, alkoxy)imino or C3-C6-trialkylsilyl,
• Q represents a tetrazole ring which is monosubstituted by R5, optionally a tetrazole ring which is monosubstituted by R5 and selected from the group consisting of
• R5 represents C1-C5-alkyl which may be mono- to trisubstituted by halogen,
• Z represents CH or N,
• the compound of formula (I) furthermore may include an N-oxide and/or a salt thereof,
• wherein said process comprises reacting a tetrazole-substituted pyrazole acid of formula (II)
• with an isatoic anhydride of formula (III)
• to give a compound of formula (IV)
• and reacting said compound of formula (IV) in the presence of an acid with an amine of formula (V)
• R1NH2 (V)
• to give a compound of formula (I) and/or an N-oxide and/or a salt thereof.