申请人:Leo Pharmaceutical Products Ltd. A/S
公开号:US04057636A1
公开(公告)日:1977-11-08
The invention relates to a series of new compounds, to methods for preparing the compounds, to compositions containing said compounds which are useful in the human and veterinary medical practice, and to methods for treating patients suffering from certain illnesses with said compounds, the new compounds having the general formula I ##STR1## or the tautomeric forms thereof in which the R.sup.1 -substituted cyano-guanidyl radical is placed in the 2-, 3- or 4-position of the pyridine ring, and in which R.sup.1 stands for a straight or branched, saturated or unsaturated, aliphatic hydrocarbon radical having from 1 to 8 carbon atoms, a cycloalkyl or cycloalkenyl radical having from 3 to 7 carbon atoms, an aryl or an aralkyl radical, and R.sup.2 stands for hydrogen, halogen, hydroxy, lower alkyl or alkoxy radicals; and in the case of the present compounds containing one or more asymmetric carbon atoms, also the stereoisomers thereof and racemic mixtures of same; and salts of the compounds of formula I with nontoxic, pharmaceutically acceptable acids. The new compounds of the invention have surprisingly shown to be highly potent hypotensive compounds giving rise to a pronounced reduction of the blood pressure. They have a low toxicity and consequently a high therapeutic ratio.
本发明涉及一系列新化合物,制备这些化合物的方法,包含这些化合物的组合物,这些组合物在人类和兽医医疗实践中有用,并且使用这些化合物治疗某些疾病的方法,这些新化合物具有一般式I ##STR1## 或其互变异构体,其中R.sup.1-取代的氰基胍基基团位于吡啶环的2-、3-或4-位置,其中R.sup.1代表链状或支链的饱和或不饱和的脂肪烃基团,碳原子数为1至8,环烷基或环烯基基团,碳原子数为3至7,芳基或芳基烷基基团,R.sup.2代表氢、卤素、羟基、低级烷基或烷氧基基团;对于含有一个或多个不对称碳原子的化合物,还包括它们的立体异构体和混合物;以及与无毒、药学上可接受的酸形成的公式I化合物的盐。本发明的新化合物表现出高效的降压作用,可以显著降低血压。它们具有低毒性,因此具有高治疗比。