Acylaminoquinazoline derivatives of formula (I):
(in which:
R1 represents a lower alkoxy group, a substituted or unsubstituted lower alkyl group, a cycloalkyl group, a lower alkenyl group, a vinyl group having an optionally substituted phenyl or furyl substituent, an optionally substituted phenyl group, a furyl group, an oxazolyl group, a methylthiooxadiazolyl group or a tetrahydrofuryl group;
R2 represents a hydrogen atom or a lower alkyl group;
R3 represents a lower alkyl group or an optionally substituted phenyl group;
R4 represents a hydrogen atom or an acyloxy- substituted phenyl group;
X represents a methylene group or a sulphur atom; and n is 2 or 3)
and pharmaceutically acceptable acid addition salts thereof are valuable antihypertensive agents and inhibit the activity of the angiotension I-converting enzyme. They may be prepared by reacting a 4-aminoquinazoline derivative with a carboxylic acid or reactive derivative thereof corresponding to the amide group which it is desired to introduce at the 4- position of said compound of formula (I). The compounds of the invention may be formulated with conventional pharmaceutically acceptable carriers or diluents to provide a pharmaceutical composition.
式(I)的酰
氨基
喹唑啉衍
生物:
其中
R1 代表低级烷氧基、取代或未取代的低级烷基、环烷基、低级烯基、具有任选取代的苯基或
呋喃取代基的
乙烯基、任选取代的苯基、
呋喃基、
噁唑基、甲
硫二唑基或四氢糠基;
R2 代表氢原子或低级烷基;
R3 代表低级烷基或任选取代的苯基;
R4 代表氢原子或被酰氧基取代的苯基;
X 代表亚甲基或
硫原子;且 n 为 2 或 3)
及其药学上可接受的酸加成盐是有价值的降压药,可抑制
血管紧张素 I 转换酶的活性。它们可以通过将
4-氨基喹唑啉衍
生物与
羧酸或其反应衍
生物反应来制备,
羧酸或反应衍
生物与希望在所述式(I)化合物的 4-位上引入的酰胺基团相对应。本发明化合物可与常规药学上可接受的载体或稀释剂配制成药物组合物。