申请人:American Home Products Corporation
公开号:US04182872A1
公开(公告)日:1980-01-08
Compounds of the formula ##STR1## wherein R is hydrogen (lower)alkyl, phen(lower)alkyl, benzoyl(lower)alkyl, or p-halobenzoyl(lower)alkyl; R.sup.1 is hydrogen or (lower)alkyl; R.sup.2 is hydrogen, (lower)alkyl, (lower)alkoxy, chlorine, fluorine, trifluoromethyl, or amino in the 7-, 8-, or 9-position; R.sup.3 is hydrogen, or (lower)alkyl; and R.sup.4 is hydrogen, (lower)alkyl, (lower)alkoxy, chlorine, fluorine, or trifluoromethyl in the 7-, 8-, or 9-position; or the non-toxic acid addition salts thereof; exert a hypotensive effect in hypertensive animals. Also disclosed are chemical intermediates, including 4-(lower)alkyl-1-(o-nitrophenyl)piperazine-2-carboxylic acids.
化合物的化学式为##STR1##其中R为氢(低)烷基,苯(低)烷基,苯甲酰(低)烷基或对卤苯甲酰(低)烷基;R.sup.1为氢或(低)烷基;R.sup.2为氢,(低)烷基,(低)烷氧基,氯,氟,三氟甲基或7-,8-或9-位上的氨基;R.sup.3为氢或(低)烷基;R.sup.4为氢,(低)烷基,(低)烷氧基,氯,氟或三氟甲基或7-,8-或9-位上的氨基;或其无毒酸盐。这些化合物对高血压动物具有降压作用。还披露了化学中间体,包括4-(低)烷基-1-(o-硝基苯基)哌嗪-2-羧酸。