n - aryl - 3 - aryl - 4,5 - dihydro - 1h pyrazole - 1 - carboxamider, procedure for the manufacture of relations, insecticides containing relations and rules for the control of insects

摘要

Compounds of the general formula: …CHEM… which are N-aryl-3-aryl-4,5-dihydro-1H-pyrazole-1-carboxamides and agronomically acceptable salts thereof are pesticidally, especially insecticidally active. They are provided in insecticidal compositions together with agronomically acceptable carriers or diluents and may be applied to insects or to loci to be freed or protected to attack by insects. The compounds may be prepared from 1-substituted-4,5-dihydro-1H-pyrazoles which may also be 4-monosubstituted by deprotonation and subsequent alkylation or acylation or from beta-dicarbonyl compounds by reaction with hydrazine and formaldehyde and subsequently aryl isocyanate followed by optional treatment with base and alkylation or acylation.