2-(1H-indol-1-yl)ethyl!-2-piperazine and pyrido 1,2-a!indol-9-one as intermediates for pyrazino(2,3-3,4)pyrido(1,2-a) indoles which are useful for treating hypertension in mammals

摘要

A compound of the formula ##STR1## in which R.sup.1 is hydrogen, halogen, lower alkyl, lower alkoxy or trifluoromethyl;P PR. sup.2 is hydrogen or lower alkyl having one to three carbon atoms; and PPR.sup.5 is benzyl or lower alkyl;P Pand a compound of the formula ##STR2## in which R.sup.1 is hydrogen, halogen, lower alkyl, lower alkoxy or trifluoromethyl;P PR.sup.2 is hydrogen or lower alkyl having one to three carbon atoms; andP PX is bromo or chloro, or hydrogen;P Pas intermediates for pyrazino(2,3-3,4) pyrido (1,2-a) indoles which are useful for treating hypertension in mammals.