Spirocyclic tetronic acid derivatives
View Patent ↗The present invention relates to novel spirocyclic tetronic acid derivatives of the formula (I) in which R 1 , R 2 and R 3 have the meanings given in the description, to a plurality of processes for their preparation and to their use as pesticides.
1. A compound of formula (I-3)
2. A process for preparing a compound of the formula (I-3) according to claim 1 , comprising reacting a compound of formula (II)
α) with a compound of formula (III)
in which
R 1 is C 2 H 5 , R 2 and R 3 are CH 3 , and
Hal represents halogen
or
β) with a carboxylic anhydride of formula (IV)
in which
R 1 is C 2 H 5 , R 2 and R 3 are CH 3 ,
optionally in the presence of a diluent and optionally in the presence of an acid binder;
or
γ) with an activated carboxylic acid derivative of formula (V)
in which
R 1 is C 2 H 5 , R 2 and R 3 are CH 3 ,
and
U represents a leaving group introduced by a carboxylic acid-activating reagent,
optionally in the presence of a diluent and optionally in the presence of an acid binder.
3. A pesticide, comprising the compound of formula (I-3) according to claim 1 .
4. A method for controlling animal pests, comprising allowing the compound of formula (I-3) according to claim 1 to act on pests, their habitat, or combinations thereof.
5. A process for preparing a pesticide, comprising mixing the compound of formula (I-3) according to claim 1 with an extender, a surfactant, or a combination thereof.