PROCEDE DE PREPARATION DES DERIVES DE PYRIDINE

摘要

Insecticidally active, novel compounds of the formula I in which the symbols R1 to R5 are as defined in Claim 1, which are suitable for the selective control of harmful insects, in particular aphids, are prepared by oxidation of the corresponding pyridines. The oxidation is expediently carried out using oxidants such as hydrogen peroxide or peracids.