Compounds of formula I: t,0010
where R
1
, R
2
and R
3
are the same or different and signify hydrogens, halogens, alkyl, alkylaryl, alkyloxy, hydroxy, nitro, amino, alkylcarbonylamino, alkylamino or dialkylamino group; R
4
signifies hydrogen, alkyl or alkylaryl group; X is CH
2
, O or S, and n is 1, 2 or 3, with the proviso that if X is CH
2
, n is not 1, and a method for their preparation. The compounds have potentially valuable pharmaceutical properties for the treatment of cardiovascular disorders such as hypertension and chronic heart failure.
式I的化合物:其中R1、R2和R3相同或不同,表示氢、卤素、烷基、烷基芳基、烷氧基、羟基、硝基、
氨基、烷基羰基
氨基、烷基
氨基或二烷基
氨基基团;R4表示氢、烷基或烷基芳基基团;X为
CH2、O或S,n为1、2或3,但如果X为 ,则n不为1;以及它们的制备方法。这些化合物具有潜在的有价值的药理特性,可用于治疗心血管疾病,如高血压和慢性心力衰竭。