Patent ID: 7161011

Claim:
A process for the preparation of a compound of the formula and, where applicable, its E/Z-isomers, mixtures of E/Z-isomers and/or tautomers and acid addition products thereof, in each case in free form or in salt form, wherein R is unsubstituted or substituted C 1 –C 1 alkyl, unsubstituted or substituted C 2 –C 4 alkenyl, unsubstituted or substituted C 2 –C 4 alkynyl, unsubstituted or substituted C 3 –C 6 cycloalkyl, unsubstituted or substituted aryl; and X is a halogen, the process comprising, reacting a compound of the formula or, where applicable, an E/Z-isomer, a mixture of E/Z-isomers and/or a tautomer thereof, in each case in free form or in salt form, wherein R is as defined for formula (I), with a water removing reagent.