申请人:Chinoin Gyogyszer Es Vegyeszeti Termekek Gyara Rt
公开号:US04748175A1
公开(公告)日:1988-05-31
The invention relates to novel pyrimido [5,4-b][1,4]oxazine derivatives of the formula (I), and the acid addition salts thereof, pharmaceutical compositions containing them and a process for their preparation. In the formula (I) ##STR1## wherein R.sup.1 stands for a C.sub.1-4 alkyl group; R.sup.2 stands for hydrogen or halogen or an azido group or an --NR.sup.5 R.sup.6 group, wherein R.sup.5 represents hydrogen or a benzyl group, or a C.sub.1-4 alkyl group unsubstituted or substituted by a hydroxyl group, R.sup.6 stands for hydrogen, an amino group, a C.sub.3-6 cycloalkyl group, a straight or branched-chain C.sub.1-4 alkyl group optionally substituted by a hydroxyl, mercapto, aminocarbonyl, furyl, 2-benzo[1,4]dioxanyl, di(C.sub.1-4 alkyl)amino group or by a phenyl or phenoxy group optionally mono- or polysubstituted by halogen or C.sub.1-4 alkoxy group (s) or by a 6-membered, saturated nitrogen-containing heterocycle optionally containing an additional nitrogen or oxygen atom and optionally substituted by a C.sub.1-4 alkyl or benzyl group; further NR.sup.5 R.sup.6 may also represents a 6-membered, saturated, nitrogen-containing heterocycle optionally containing an additional nitrogen or oxygen atom and optionally substituted by a C.sub.2-4 alkoxycarbonyl or C.sub.1-4 hydroxyalkyl group; R.sup.3 and R.sup.4 are the same or different and stand for hydrogen or a C.sub.1-4 alkyl group; R.sup.9 stands for hydrogen or a C.sub.1-4 alkyl group unsubstituted or monosubstituted by an oxo, cyano, aminocarbonyl, C.sub.2-5 alkoxycarbonyl, pyridiyl, morpholinocarbonyl, or phenyl group or mono- or polysubstituted by OH group(s), with the proviso that R.sup.2 is different from chlorine, 4-morpholinyl and piperidyl group when R.sup.9 stands for hydrogen; or R.sup.2 is different from chlorine and 4-morpholinyl group when R.sup.9 stands for a methyl or benzyl group. The compounds of the formula (I) are capable to increase the myocardial contractile force (the performance of the failing heart) and the coronary blood flow, thus they can therapeutically be used for the treatment of the chronic heart failure and coronary disturbances.
本发明涉及一种新型
嘧啶并[5,4-b][1,4]
噁唑衍
生物的公式(I),以及其酸加成盐、含有它们的制药组合物和制备方法。在公式(I)中,R1代表C1-4烷基;R2代表氢、卤素、偶氮基或--NR5R6基团,其中R5代表氢或苄基,或C1-4烷基,未取代或被羟基取代,R6代表氢、
氨基、C3-6环烷基、直链或支链C1-4烷基,可选地被羟基、
硫醇基、
氨基甲酰基、
呋喃基、2-苯并[1,4]二氧杂环基、二(C1-4烷基)
氨基基团或苯基或苯氧基取代的卤素或C1-4烷氧基(s)或由含氮的6元饱和杂环可选地含有额外的氮或氧原子和可选地被C1-4烷基或苄基取代的苯基或苯氧基单或多取代的杂环取代;进一步,NR5R6还可以代表一个由含氮的6元饱和杂环,可选地含有额外的氮或氧原子,并且可选地被C2-4烷氧羰基或C1-4羟基烷基取代;R3和R4相同或不同,代表氢或C1-4烷基;R9代表氢或未取代或被氧代、
氰基、
氨基甲酰基、C2-5烷氧羰基、
吡啶基、吗啉甲酰基或苯基单或多取代的OH基,或由OH基单或多取代的C1-4烷基,但要求当R9代表氢时,R2与
氯、4-吗啉基和
哌啶基不同;或当R9代表甲基或苄基时,R2与
氯和4-吗啉基不同。公式(I)化合物能够增加心肌收缩力(衰竭心脏的性能)和冠状动脉血流,因此它们可以用于治疗慢性心力衰竭和冠状动脉障碍的治疗。