Cyclic alkylidenyl N-(lower-alkyl)-3-PY-anilinomethylenemalonates (I), where PY is 4- or 3-pyridinyl or 4- or 3-pyridinyl having one or two lower-alkyl substituents, are prepared by reacting cyclic alkylidenyl (lower-alkoxy)methylenemalonate (II) with N-(lower-alkyl)-3-PY-aniline (III). Also, I is heated with polyphosphoric acid to produce 1-(lower-alkyl)-1,4-dihydro-4-oxo-7-PY-3-quinolinecarboxylic acid, known antibacterial agents. The N-(lower-alkyl)-3-PY-anilines are produced by reducing the corresponding N-(3-PY-phenyl)-(lower-alkanamides).
环烷基亚
乙烯基N-(低碳基)-3-PY-苯甲亚甲基马隆酸酯(I),其中PY为4-或3-
吡啶基或4-或3-
吡啶基有一个或两个低碳基取代基,通过将环烷基亚
乙烯基(低碳氧基)亚甲基马隆酸酯(II)与N-(低碳基)-3-PY-
苯胺(III)反应制备而成。同时,将I与多聚
磷酸加热可得1-(低碳基)-1,4-二氢-4-氧基-7-PY-
3-喹啉羧酸,这是已知的抗菌剂。N-(低碳基)-3-PY-
苯胺可通过还原相应的N-(3-PY-苯基)-(低碳烷酰胺)制备。