Patent ID: 7323564

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 12 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, unsubstituted or substituted heteroaryl, or —SR 1 ; R 1 is unsubstituted or substituted C 1 -C 12 alkyl, unsubstituted or substituted C 2 -C 4 alkenyl, unsubstituted or substituted C 2 -C 4 alkynyl, unsubstituted or substituted cycloalkyl, unsubstituted or substituted aryl or unsubstituted or substituted heteroaryl; and X is halogen; said 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 or an acid addition product thereof, in each case in free form or in salt form, with a compound having a formula selected from the group consisting of halogen-C(═O)—O—C 1 -C 8 alkyl; halogen-C(═O)—O-aryl; and halogen-C(═O)—O-benzyl; wherein: R is as defined for formula (I); R 2 and R 3 are each independently of the other H, C 1 -C 6 alkyl, C 3 -C 6 cycloalkyl, phenyl or benzyl or, together with the nitrogen atom to which they are bonded, form a five- to seven-membered ring in which a —CH 2 -group has optionally been replaced by a hetero atom selected from the group consisting of O and S, or by NR 9 , and wherein the carbon-chain of the five- to seven-membered ring is unsubstituted or is mono- or di-substituted by C 1 -C 4 alkyl; and R 9 is an organic radical.