| abstract |
The present invention relates to a process for preparing substituted isatoic acid anhydride compounds of the formula (I) in which R 1 is Cl, Br, I, or CN; and R 2 is CH 3 , Cl, Br; using anthranilic acid derivative compounds of formula (III) and/or carbamate compounds of formula (II) wherein R 1 and R 2 are as defined above; R Ar is CH 3 , Cl, NO 2 and n is 0, 1, 2, 3, 4 or 5; The present invention relates also to the compounds of formula (II) and to processes comprising 20 further preceding and/or subsequent reaction steps, leading to anthranilamide pesticides or to precursors for them. |