- Synthesis and antiarrhythmic activity of new 1-[1-[2-[3-(alkylamino)-2-hydroxypropoxy]phenyl]vinyl]-1H-imidazoles and related compounds
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Various 1-[1-[2-[3-(alkylamino)-2-hydroxypropoxy]phenyl]vinyl]-1H-azoles were synthesized and investigated for β-adrenoceptor-blocking and antiarrhythmic activities. Although no compounds showed more potent β-blocking effects than propranolol in the isolated guinea pig right atria, many compounds exhibited significant antiarrhythmic effects against aconitine or ischemic arrhythmia in mice or dogs. 1-[2,5-Dichloro-6-[1-(1H-imidazol-1-yl)ethenyl]phenoxy]-3-[(1-methylethyl) amino]-2-propanol hydrochloride (48) (711389-S) was selected as a candidate for clinical evaluation in man, since its antiarrhythmic effects were superior to those of quinidine, disopyramide, or propranolol. Asymmetric synthesis of (R)-(+)- and (S)-(-)-48 is described, and it is proven that there is no stereospecificity in the antiarrhythmic effect of 48.
- Ogata,Matsumoto,Takahashi,Shimizu,Kida,Ueda,Kimoto,Haruna
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p. 1142 - 1149
(2007/10/02)
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- β1-Selective adrenoceptor antagonists: Examples of the 2-[4-[3-(substituted-amino)-2-hydroxypropoxy]phenyl]imidazole class
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A series of 2-[4-[3-(substituted-amino)-2-hydroxypropoxy]phenyl]imidazoles is described. The compounds were investigated in vitro for β-adrenoceptor antagonism, and several examples were found to be selective for the β1-adrenoceptor. The structure-activity relationship exhibited by this series of compounds is discussed. (S)-2-[p-[3-[[2-(3,4-dimethoxyphenyl)ethyl]amino]-2-hydroxypropoxy]phenyl] -4-(2-thienyl)imidazole [(S)-13] was over 100 times more selective than atenolol for the β1-adrenergic receptor and has been selected for in-depth studies.
- Baldwin,Denny,Hirschmann,Freedman,Ponticello,Gross,Sweet
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p. 950 - 957
(2007/10/02)
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