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  • Title: Heterocyclic analogues of the antihypertensive beta-adrenergic blocking agent (S)-2-[3-(ter-butylamino)-2-hydroxypropoxy]-3-cyanopyridine.
    Author: Baldwin JJ, Engelhardt EL, Hirschmann R, Ponticello GS, Atkinson JG, Wasson BK, Sweet CS, Scriabine A.
    Journal: J Med Chem; 1980 Jan; 23(1):65-70. PubMed ID: 6102151.
    Abstract:
    The synthesis of a series of isoelectronic analogues of (S)-2-[3-(tert-butylamino)-2-hydroxypropoxy]-3-cyanopyridine (1) are described; included in this group are examples of thiazole, isothiazole, thiadiazole, pyrazine, and the structurally related naphthyridines. All of the compounds are similar to 1 in that they contain a cyano group ortho to the aminohydroxypropoxy side chain and meta to the nitrogen heteroatom. In addition, several related examples, having additional nuclear substituents and/or groups other than CN in the position adjacent to the aminohydroxypropoxy group, were prepared, and beta-adrenoceptor antagonist activity and vasodilating potency were determined. Three compounds, thiazole 2 and isothiazoles 3 and 27, effectively lowered mean arterial pressure in the SH rat at 5 mg/kg. Compounds 2, 3, and 27 increased iliac blood flow and exhibited beta-adrenergic blocking properties in the dog.
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