Collect. Czech. Chem. Commun. 1983, 48, 1089-1096

Basic amides of 2,4,5-trichlorophenoxyacetic, 2,4,6-trimethylphenoxyacetic and 4-bromo-3,5-dimethylphenoxyacetic acid and some related compounds; Synthesis and pharmacological screening

Vladimír Valenta, Jiří Němec and Miroslav Protiva

Research Institute for Pharmacy and Biochemistry, 130 60 Prague 3


Reactions of methyl esters II of 2,4,5-trichlorophenoxyacetic (Ia), 2,4,6-trimethylphenoxyacetic (Ib) and 4-bromo-3,5-dimethylphenoxyacetic acid (Ic) with 2-diethylaminoethylamine, 2-morpholinoethylamine, 3-morpholinopropylamine, 1-methylpiperazine, 3-(4-methylpiperazino)propylamine, 3-[4-(2-tolyl)piperazino]propylamine and 1,4-bis(3-aminopropyl)piperazine in boiling ethanol gave the basic amides Va-XIc which were isolated as hydrochlorides. Reactions of the acid chlorides IVa and IVb with 1,4-bis(2-hydroxyethyl)piperazine and 1,4-bis(3-hydroxypropyl)piperazine in dimethylformamide resulted directly in dihydrochlorides of diesters XIIab and XIIIab. The compounds prepared have only weak CNS effects (mostly of the depressant type); they have local anaesthetic, mild hypotensive (some of them adrenolytic), antiarrhythmic and peripheral vasodilating activities.