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Synthesis and Biological Evaluation of New Combined α/β-Adrenergic Blockers. | LitMetric
The synthesis, characterization, and pharmacological evaluation of new aryloxyaminopropanol compounds based on substituted (4-hydroxyphenyl)ethanone with alterations in the alkoxymethyl side chain in position 2 and with 2-methoxyphenylpiperazine in the basic part of the molecule are reported. For the in vitro pharmacological evaluation, isolated aorta and atria from normotensive Wistar rats were used. Compared to naftopidil, compounds with ethoxymethyl, propoxymethyl, butoxymethyl, and methoxyethoxymethyl substituent displayed similar α -adrenolytic potency. Compounds with methoxymethyl, ethoxymethyl, and propoxymethyl substituent caused a significant decrease in both spontaneous and isoproterenol-induced beating of isolated rat atria. Naftopidil and the tested substances containing a butoxymethyl and methoxyethoxymethyl substituent had no effect on the spontaneous or isoproterenol-induced beating. The tested substance that had the most pronounced effect was the compound with a propoxymethyl substituent. Its antihypertensive efficacy was investigated in vivo on spontaneously hypertensive rats (SHRs). The systolic blood pressure was found to be significantly lower in SHRs subjected to the treatment for 2 weeks than in untreated SHRs. Naftopidil had no significant effect.
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