Benzopyran compound and its pharmaceutical use

Abstract

A benzopyran compound of the general formula (I) ##STR1## wherein A represents --OR.sup.1 or --NH--COR.sup.2 (wherein R.sup.1 represents hydrogen, a lower alkyl, formyl, an alkanoyl, an aroyl or an aralkyl and R.sup.2 represents hydrogen, a lower alkyl, a lower alkoxy, amino, mono- or di-lower alkylamino, an amino-lower alkyl, a hydroxy-lower alkyl, a halo-lower alkyl, a lower alkoxy-lower alkyl, an acyloxy-lower alkyl, a lower alkoxycarbonyl-lower alkyl, an aryl or a heteroaryl); R.sup.3 represents hydrogen, a lower alkyl, a lower alkoxy, amino, a mono- or di-lower alkylamino, an amino-lower alkyl, a hydroxy-lower alkyl, a halo-lower alkyl, a lower alkoxy-lower alkyl, an acyloxy-lower alkyl, a lower alkoxycarbonyl-lower alkyl, an aryl or a heteroaryl, or R.sup.2 and R.sup.3 combinedly together form an alkylene having 1 to 2 carbon atoms; R.sup.4 and R.sup.5 are the same or different, and respectively represent hydrogen or a lower alkyl, or combinedly together form an alkylene having 2 to 5 carbon atoms; R.sup.6 represents hydroxyl group, formyloxy, an alkanoyloxy, a haloalkanoyloxy, a lower alkoxycarbonyloxy, an aroyloxy, a heteroaroyloxy, carbamoyloxy, a mono- or di-lower alkycarbamoyloxy and R.sup.7 represents hydrogen, or R.sup.6 and R.sup.7 combinedly together form a bond and X and Y are the same or different, and respectively represent hydrogen, halogen, nitro, cyano, a lower alkyl, a lower alkoxy, a halo-lower alkyl, carboxyl, formyl, an alkanoyl, an aroyl, a halo-alkanoyl, carbamoyl, a lower alkylsulfinyl, an arylsulfinyl, a lower alkylsulfonyl, an arylsulfonyl, sulfonamido or a mono- or di-lower alkylsulfonamido, or their pharmaceutically acceptable salts and its pharmaceutical use. The compounds of the present invention exhibit remarkable and long lasting antihypertensive actions and peripheral vascular relaxant actions and therefore are useful as therapeutic medicines for hypertensive. Since they also display selective coronary vasodilating actions and the duration of actions are very long, they are of use as therapeutic medicines for cardiovascular disturbances such as angina pectoris and cardiac insufficiency.