| 摘要 |
The invention relates to processes for the preparation of 6-substituted 2-(imidazolin-2-yl)-nicotinic acid derivatives that are distinguished by excellent herbicidal and plant growth-regulating properties, and to intermediates and processes for the preparation of the intermediates. The derivatives correspond to formula I <IMAGE> (I) in which R1 represents hydrogen or a salt, ester or amide radical, each of R2 and R3, independently of the other, represents C1-C4-alkyl or they together represent a C3-C5-alkylene radical, X represents hydrogen or methyl, Y represents hydrogen, halogen, alkyl, haloalkyl, hydroxyalkyl, alkoxy, alkylthio, phenoxy, nitro, cyano, alkylamino, phenyl, alkenyloxy or alkynyloxy, and Z represents a -CQ1Q2Q3 or -CQ1Q4Q5 radical in which Q1 and Q2 each represents hydrogen or C1-C4-alkyl, Q3 represents C1-C6-alkoxy or phenoxy that is unsubstituted or substituted, or C3-C6-alkenyloxy or C3-C6-alkynyloxy and Q4 and Q5, together with the carbon atom to which they are bonded, represent a cycloalkyl, furyl, pyran, dioxan or dioxolan radical, or Z represents a 5- or 6-membered heterocyclic radical.
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