Process for the production of amides

摘要

The present invention relates to processes for the preparation of a compound of formula I
wherein R 1 and R 2 are each independently of the other hydrogen or C 1 -C 5 alkyl and R 3 is CF 3 or CF 2 H, comprising converting a compound of formula VI
wherein L is a C 1 -C 6 alkylene chain and R 3 is as defined for formula I, into the compound of formula I by reaction with a compound of formula IV
wherein R 1 and R 2 are as defined for formula I, as well as to intermediates of formula VI.