Benzofuran derivatives, processes for preparing the same and antihypertensive agents containing the same
申请人:KAKEN PHARMACEUTICAL CO., LTD.
公开号:EP0156331A2
公开(公告)日:1985-10-02
A [2-hydroxy-3-(4-phenylpiperazinyl)propoxy) benzofuran derivative having the formula (I):
wherein X is acetyl, carbamoyl, cyano, a lower alkoxycarbonyl, carboxyl or 1-hydroxyethyl group, R is hydrogen atom, a lower alkoxy group, a lower alkyl group or a halogen atom;. R is attached to an arbitrary position of ortho-position, meta-position and para-position to N-phenyl group, and a group having the formula:
is attached to an arbitrary position of 4, 5, 6 and 7 positions to benzofuran ring orthe salt thereof, a process for preparing the same and an antihypertensive agent containing the same as an effective component. The benzofuran derivative has a strong a-adrenergic blockade effect and calcium antagonistic effect with a more decreased side-effect.