| 摘要 |
Acylaminoquinazoline derivatives of formula <IMAGE> (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. |
