Abstract: The invention relates to a method for the preparation of 1-[2-(2-naphthyl)ethyl]-4-(3-trifluoromethylphenyl)-1,2,3,6-tetrahydropyri dine and its pharmaceutically acceptable salts by reacting 2-(2-bromoethyl)naphthalene with 4-(3-trifluoromethylphenyl)-1,2,3,6-tetrahydropyridine or one of its salts, and to a universal method for the preparation of the same product and its salts by the reduction of naphthylacetic acid, treatment of the resulting 2-naphthylethanol with hydrobromic acid and treatment of the 2-(2-bromoethyl)naphthalene with 4-(3-trifluoromethylphenyl)-1,2,3,6-tetrahydropyridine or one of its salts.

Abstract: The invention concerns compositions with antimicrobial activity.These compositions contain a benzoic acid derivative with the formula: ##STR1## in which: A represents a straight or branched alkyl chain with 3 to 4 carbon atoms,X represents the oxygen atom or a direct bond,R represents hydrogen or an alkyl group with 2 to 6 carbon atoms, possibly substituted by an alcohol function and a salt of such a derivative.Applications: drugs, disinfectants and preservative agents.

Abstract: Benzoic acid derivatives with the general formula: ##STR1## in which: A represents a straight or branched alkyl chain with 5 to 10 carbon atoms,X represents the oxygen atom or a direct bond,R represents hydrogen or an alkyl group with 2 to 6 carbon atoms, possibly substituted by an alcohol function,and the salts of the said derivatives.These derivatives display antimicrobial activity and are suitable as antiseptics, disinfectants and preservatives, particularly in the fields of pharmaceuticals, cosmetology and agri-foodstuffs.