Process for preparing arylamine intermediates useful in the preparation of pesticides

摘要

The invention relates to a process for the preparation of an arylamine compound of formula (I), wherein R1 is (C1-3)-haloalkyl, (C1-3)-haloalkoxy or SF5; W is N or CR3; and R2 and R3 are each independently hydrogen or chlorine; or an acid addition salt thereof; which comprises the hydrogenolysis of a compound of formula (II) or an acid addition salt thereof, with a metal or metal compound under reducing conditions. Arylamine compounds of formula (I) are used for the synthesis of pesticidally active phenylpyrazole compounds.