Cardiotonic agents. 2. Synthesis and structure-activity relationships of 4,5-dihydro-6-[4-(H-imidazol-1-yl)phenyl]-3(2H)-pyridazinones: a new class of positive inotropic agents
作者:Ila Sircar、Bradley L. Duell、George Bobowski、James A. Bristol、Dale B. Evans
DOI:10.1021/jm00148a006
日期:1985.10
substituent at the 5-position of 1 (CI-914) produced the most potent compound in this series (11, CI-930). Compound 1 is more potent than amrinone whereas compound 11 is more potent than milrinone. The inotropic effects of 1 and 11 are not mediated via stimulation of beta-adrenergic receptors. Selective inhibition of cardiac phosphodiesterase fraction III represents the principal component of the positive
合成了一系列的4,5-二氢-6- [4-(1H-咪唑-1-基)苯基] -3(2H)-哒嗪酮和相关化合物,并评价其正性肌力活性。该系列的大多数成员产生剂量相关的心肌收缩力增加,这与心率相对较小的升高和全身动脉血压的降低有关。在1的5位上引入甲基取代基(CI-914)产生了该系列中最有效的化合物(11,CI-930)。化合物1比氨力农更有效,而化合物11比米力农更有效。1和11的正性肌力作用不是通过刺激β-肾上腺素受体介导的。心脏磷酸二酯酶组分III的选择性抑制代表1和11的正性肌力作用的主要成分。