Patent ID: 7371885

Claim:
A process for the isomerisation of the Z-isomer I-Z of a compound of the general formula I into its E-isomer I-E wherein m, p and q are each independently an integer of 0, 1, 2, 3 or 4 R 1 , R 2 , R 3 are each independently halogen; OH; CN; NO 2 ; C 1 -C 6 -alkyl, optionally substituted with C 1 -C 4 -alkoxy, C 1 -C 4 -haloalkoxy or C 3 -C 6 -cycloalkyl; C 1 -C 6 -haloalkyl; C 3 -C 6 -cycloalkyl; C 1 -C 6 -alkoxy optionally substituted with C 1 -C 4 -alkoxy or C 3 -C 6 -cycloalkyl; C 1 -C 6 -haloalkoxy; C 1 -C 6 -alkylcarbonyl; C 3 -C 6 -cycloalkoxy; C 1 -C 6 -alkoxycarbonyl or C 1 -C 6 -alkoxycarbonyloxy; which is characterized in that the Z isomer I-Z or a mixture of the stereoisomers I-Z and I-E is isomerizing with iodine.