Patent ID: 8350046

Claim:
A process for preparing a compound of the formula (I) wherein Ar is a mono- to trisubstituted phenyl, pyridyl or pyrazolyl ring, where the substituents are each independently selected from the group consisting of halogen, C 1 -C 4 -alkyl and C 1 -C 4 -haloalkyl; M is thienyl or phenyl, which may bear a halogen substituent; Q is a direct bond, cyclopropylene, a fused bicyclo[2.2.1]heptane or bicyclo[2.2.1]heptene ring; R 1 is hydrogen, halogen, C 1 -C 6 -alkyl, C 1 -C 4 -alkoxy, C 1 -C 4 -haloalkoxy, mono- to trisubstituted phenyl, wherein the substituents are each independently selected from the group consisting of halogen and trifluoromethylthio, or cyclopropyl; by reacting an acid chloride of the formula (II) with an arylamine (III) in a suitable nonaqueous solvent, which comprises, in the absence of an auxiliary base, a) initially charging the acid chloride (II), b) establishing a pressure of from 0 to 700 mbar, c) metering in the arylamine (III) in an approximately stoichiometric amount and d) isolating the compound of formula (I).