A compound of the formula ##STR1## in which R.sup.1 is hydrogen, halogen, lower alkyl, lower alkoxy or trifluoromethyl; R.sup.2 is hydrogen or lower alkyl having one to three carbon atoms; and R.sup.5 is benzyl or lower alkyl; and a compound of the formula ##STR2## in which R.sup.1 is hydrogen, halogen, lower alkyl, lower alkoxy or trifluoromethyl; R.sup.2 is hydrogen or lower alkyl having one to three carbon atoms; and X is bromo or chloro, or hydrogen; as intermediates for pyrazino(2,3-3,4) pyrido (1,2-a) indoles which are useful for treating hypertension in mammals.
一种化合物的公式为##STR1##其中R.sup.1为氢,卤素,低碳基,低烷氧基或三
氟甲基;R.sup.2为氢或具有一至三个碳原子的低碳基;R.sup.5为苄基或低碳基;以及一种化合物的公式为##STR2##其中R.sup.1为氢,卤素,低碳基,低烷氧基或三
氟甲基;R.sup.2为氢或具有一至三个碳原子的低碳基;X为
溴或
氯或氢;作为
吡唑(2,3-3,4)
吡啶(1,2-a)
吲哚的中间体,该中间体对于治疗哺乳动物的高血压具有用处。