Patent ID: 6121496
Filing Date: 2000-09-19
Classification: C07C

Abstract:
A process for the acylation of an aromatic thioether, comprising the step of reacting said thioether with an acylating agent selected from the group consisting of the halides of aliphatic carboxylic acids and the anhydrides of aliphatic carboxylic acids, in the presence of an effective quantity of an acid zeolite, said aromatic thioether having the general formula (I): ##STR4## wherein: A symbolizes the radical of a ring forming all or part of an aromatic, monocyclic or polycyclic carbocyclic system, a system containing at least one SR' group;the R groups which are the same or different, represent:a hydrogen atoma linear or branched alkyl radical having 1 to 6 carbon atoms,a linear or branched alkenyl radical having 2 to 6 carbon atoms,a cyclohexyl or benzyl radical,a linear or branched alkoxy radical having 1 to 6 carbon atoms,an acyl group having 2 to 6 carbon atoms,a hydroxyl group,a halogen atom,a trifluoromethyl radical, oran amine group:R' represents an optionally substituted hydrocarbon radical having 1 to 24 carbon atoms, andn is 0 or a number lower than or equal to 4.