Patent ID: 8222408

Claim:
Process for preparing an acyl amide compound of formula (I) in which R 1 is hydrogen or a C 1 -C 8 -alkyl radical, R 2 is a dichloromethyl or trichloroethyl group, and Z 1 to Z 6 are each independently hydrogen or a C 1 -C 8 -alkyl radical, wherein a) an o-nitrophenoxy carbonyl compound of formula (II) in which R 1 and Z 1 to Z 6 are each as defined for formula (I) is allowed to crystallize out of an organic solvent and removed, b) the o-nitrophenoxy carboxyl compound is dissolved in a mixture of C 1 -C 3 -alcohol and an aromatic solvent, c) the pH in this solution is set to a value between 6 and 11, d) the o-nitrophenoxy compound of the formula (II) present in this solution is hydrogenated in the presence of a molybdenum- and/or aluminium- and/or iron-doped sponge metal catalyst based on nickel with hydrogen gas with ring closure to give the benzoxazine compound of the formula (III) in which R 1 and Z 1 to Z 6 are each as defined for compounds of the formula (I), and then e) the compound of the formula (III) is reacted with an acyl halide of the formula (IV) in which R 2 is as defined for compounds of the formula (I) and X is a halogen atom to give compounds of the formula (I).