Alkyl polyhydro-2-phenanthrylideneacetates are prepared by interacting the corresponding 2-oxopolyhydrophenanthrenes with a tri-lower-alkyl .alpha.-phosphono-lower-alkanoate. Said alkyl polyhydro-2-phenanthrylideneacetates are hydrolyzed to the free acid, and then reesterified via the acid chloride with a tertiaryamino-lower-alkanol to give basic esters having cardiotonic activity.
烷基多羟基-2-
菲啶烯
乙酸酯是通过将相应的2-氧代多羟基
菲啶烯与三个低烷基α-
膦酸酯反应制备而成。所述的烷基多羟基-2-
菲啶烯
乙酸酯被
水解成自由酸,然后通过酸
氯化物与三级胺低烷醇重新酯化,从而得到具有心脏强心作用的碱性酯。