Process for preparing tetrazole-substituted anthranilamide derivatives and novel crystal polymorphs of these derivatives

摘要

The present invention relates to a process for preparing tetrazole-substituted anthranilamide derivatives of the formula (I);
in which R1, R2, R3, R4, R5 and Z are each as defined in the description, and to a novel crystal polymorph of these derivatives and to the use thereof in agrochemical formulations.

主权项

1. A process for preparing a compound of formula (I), or a N-oxide or a salt thereofin which
R1, R3 are each independently C1-C5-alkyl, R2 is halogen R4 is hydrogen, chlorine, or cyano, R5 is (C1-C3)perfluoroalkyl, Z is N, said process comprising reacting an N-aryl- and N-hetaryl-substituted pyrazole of formula (II) in which R is C1-C6-alkyl, aryl(C1-C6)alkyl or aryl and X is fluorine, chlorine, bromine, iodine, CH3SO2O, CF3SO3, or p-CH3—C6H4SO3, with a tetrazole of formula (III) to give a pyrazolecarboxylic ester of formula (IV) in which the latter are optionally hydrolysed under acidic or basic conditions without preceding isolation to a pyrazolecarboxylic acid of formula (V) and the latter are reacted with a compound of the formula (VI) to give an anthranilamide of the formula (I)