Alkyl .alpha.-[3-(pyridyl)-anilinomethylene]acetoacetates
    2.
    发明授权
    Alkyl .alpha.-[3-(pyridyl)-anilinomethylene]acetoacetates 失效
    烷基{60- {8 3-(吡啶基) - 苯胺基亚甲基{9乙酰乙酸酯

    公开(公告)号:US4107167A

    公开(公告)日:1978-08-15

    申请号:US833484

    申请日:1977-09-15

    摘要: Process of reacting 3-PY-aniline (I) with lower-alkyl acetoacetate (II) and tri-(lower-alkyl) orthoformate (III) to produce lower-alkyl .alpha.-(3-PY-anilinomethylene)acetoacetate (IV), heating lower-alkyl .alpha.-(3-PY-anilinomethylene)acetoacetate (IV), to produce 3-acetyl-1,4-dihydro-4-oxo-7-PY-quinoline (V) which is tautomeric with 3-acetyl-4-hydroxy-7-PY-quinoline (VA), reacting V (or VA) with a lower-alkylating agent to produce 3-acetyl-1-(lower-alkyl)-1,4-dihydro-4-oxo-7-PY-quinoline (VI) and converting VI to 1-(lower-alkyl)-1,4-dihydro-4-oxo-7-PY-3-quinolinecarboxylic acid (VII), where PY is 4(or 3)-pyridyl or 4(or 3)-pyridyl having one or two lower-alkyl substituents. The compounds of formula VII are known antibacterial agents.

    摘要翻译: 使3-PY-苯胺(I)与低级烷基乙酰乙酸酯(II)和三(低级烷基)原甲酸酯(III)反应生成低级烷基α-(3-PY-苯胺基亚乙基)乙酰乙酸酯(IV)的方法, 加热低级烷基α-(3-PY-苯胺基亚甲基)乙酰乙酸酯(IV),得到3-乙酰基-1,4-二氢-4-氧代-7-PY-喹啉(V),其与3-乙酰基 - 4-羟基-7-PY-喹啉(VA),使V(或VA)与低级烷基化剂反应,得到3-乙酰基-1-(低级烷基)-1,4-二氢-4-氧代-7 -PY-喹啉(VI),并将VI转化为1-(低级烷基)-1,4-二氢-4-氧代-7-PY-3-喹啉羧酸(VII),其中PY为4(或3) - 吡啶基或具有一个或两个低级烷基取代基的4(或3) - 吡啶基。 式VII的化合物是已知的抗菌剂。