| abstract |
Method of preparing 4 - [[(benzoyl) amino] sulfonyl] benzoyl chlorides of formula (II) ** (See formula) ** wherein R1a to R1e and R2a to R2d are each independently selected from the group consisting of hydrogen, halogen, (C1-C6) alkyl, halo (C1-C6) alkyl, (C1-C6) alkoxy, (C3-C7) cycloalkyl, (C1-C6) alkylthio, (C3-C7) alkyl ) -thio, S (O) q-(C1-C6) alkyl with q> = 0, 1 or 2, (C1-C6) alkyl -carbonyl, -CO-aryl, cyano and nitro, or in which two radicals any adjacent R1a to R1e form a radical -O-CH2CH2-, which is derived from a compound of formula (III) ** (See formula) ** in which R1a to R1e are each as defined above and a compound of formula (IV) ** (See formula) ** in which R2a to R2d are each as defined above, reacting the compounds of formula (III) and (IV) - in a solvent selected from the group of aprotic polar solvents or - in a solvent composition comprising and at least one solvent selected from the group of aprotic polar solvents. |