The invention provides compounds of the general formula (I) ##STR1## and physiologically acceptable acid addition salts, metabolically labile esters and solvates thereof in which R.sup.1 represents a halogen atom or a methyl, ethyl, n-propyl or n-butyl group; R.sup.2, R.sup.3, R.sup.4 and R.sup.5 each represent hydrogen atoms or one or two of R.sup.2, R.sup.3, R.sup.4 and R.sup.5 represent a methy or ethyl group; X represents a C.sub.4-7 alkylene chain optionally substituted by one or more C.sub.1-4 alkyl or hydroxyl groups; or optionally containing one or two double or triple bonds; or optionally interrupted by an oxygen or sulphur atom, or by a sulphone (--SO.sub.2 --) or urea (--NHCONH--) group; and Y represents a phenyl ring optionally carrying one to three substituents selected from hydroxyl, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, amino, carboxamido, C.sub.1-4 alkylsulphonylamino and nitro groups and halogen atoms with the proviso that when X is a C.sub.4-7 alkylene chain optionally containing one double bond then Y cannot represent phenyl or phenyl carrying one substituent which is halogen. The compounds according to the invention decrease total peripheral vascular resistance, increase cardiac output and produce a fall in blood pressure. They may be used in the treatment or prophylaxis of renal insuficiency and cardiovascular disorders such as hypertension, ischaemic heart disease or heart failure, for example acute or congestive heart failure.
本发明提供了一般式(I)的化合物及其生理上可接受的酸加成盐,代谢易裂解酯和溶剂化物。其中,R1代表卤素原子或甲基、乙基、正丙基或正丁基基团;R2、R3、R4和R5分别代表氢原子或R2、R3、R4和R5中的一个或两个代表甲基或乙基基团;X代表C4-7烷基链,可选择性地被一个或多个C1-4烷基或羟基基团取代;或可选择性地含有一个或两个双键或三键;或可选择性地由氧原子或
硫原子中断,或由
磺酸(-SO2-)或
尿素(-NHCONH-)基团中断;Y代表苯环,可选择性地携带一至三个取自羟基、C1-4烷基、C1-4烷氧基、
氨基、羧酰胺基、C1-4烷基磺酰胺基和硝基基团以及卤素原子的取代基,但当X为可选择性地含有一个双键的C4-7烷基链时,Y不能代表携带一个卤素取代基的苯环或苯环。本发明的化合物可降低总外周血管阻力,增加心输出量并降低血压。它们可用于治疗或预防肾功能不全和心血管疾病,例如高血压、缺血性心脏病或心力衰竭,例如急性或充血性心力衰竭。