| abstract |
Described are (het)aryloxy-, -thio-, aminocrotonates of formula (I) in which the substituents are defined as follows: U is oxygen, sulphur or amino; V is oxygen, sulphur, amino or alkylamino; X, Y, Z, independently of each other, are =N- or =CR3; R1, R2, independently of each other, are alkyl; R3 is hydrogen, cyano, nitro, halogen, alkyl, alkyl halide, alkoxy, alkoxy halide, alkylthio or alkylthio halide; R4 is an organic group bound directly to the main chain or bound via an oxy, mercapto, amino, carboxy or carbonylamino group. The invention also concerns methods of preparing such compounds and their use. |