申请人:Richter Gedeon Vegyeszeti Gyar T.R.
公开号:US04826845A1
公开(公告)日:1989-05-02
The invention relates to novel 3(2H)-pyridazinone-derivatives of the general formula (I), pharmaceutical compositions containing them and process for their preparation. In the general formula (I) ##STR1## stands for an ethyl or propyl group substituted by a terminal halogen atom or a hydroxyl or NR.sup.1 R.sup.2 group, wherein R.sup.1 represents hydrogen atom or an unsubstituted or optionally substituted benzyl group; R.sup.2 represents hydrogen atom or an unsubstituted or optionally substituted benzo[1,4]dioxan-2-yl-methyl or -ethyl group or a (CH.sub.2).sub.n --R.sup.3 group, wherein n is 2 or 3; and R.sup.3 stands for an unsubstituted or optionally substituted phenoxy or phenylthio group; and X stands for a hydrogen or halogen atom or an unsubstituted or optionally substituted, saturated or unsaturated 5- or 6-membered heterocyclic group containing a nitrogen atom and optionally an additional heteroatom, e.g. an oxygen, sulfur or nitrogen atom, with the proviso that R is different from an ethyl or propyl group substituted terminally by a hydroxyl group or halogen atom when X represents a hydrogen or chlorine atom. The compounds of general formula (I) selectively inhibit the adrenergic alpha.sub.1 receptors, have a calcium-antagonistic effect and exert blood pressure lowering action.
本发明涉及一种新的3(2H)-吡啶酮衍生物,其通式为(I),包括含有它们的药物组合物以及它们的制备方法。在通式(I)中,##STR1##代表一个乙基或丙基基团,该基团被末端卤素原子或羟基或NR.sup.1R.sup.2基团取代,其中R.sup.1代表氢原子或未取代或可选择取代的苄基基团;R.sup.2代表氢原子或未取代或可选择取代的苯并[1,4]二噁烷-2-基甲基或-乙基基团或(CH.sub.2).sub.n--R.sup.3基团,其中n为2或3;而R.sup.3代表未取代或可选择取代的苯氧基或苯硫基团;X代表氢原子或卤素原子或未取代或可选择取代的饱和或不饱和的5-或6-成员杂环基团,其中含有一个氮原子和可选择的另一个杂原子,例如氧、硫或氮原子,但要注意当X代表氢原子或氯原子时,R不同于被羟基或卤素原子末端取代的乙基或丙基基团。通式(I)化合物具有选择性抑制肾上腺素能α.sub.1受体、钙拮抗作用和降低血压的作用。