| 摘要 |
4-(4-Pyridinyl)isatoic anhydrides are prepared by reacting a 2-amino-4-(4-pyridinyl)benzoic acid, i.e., an acid, ester, or salt, with phosgene, preferably gaseous phosgene. The products are particularly useful in the preparation of antibacterial 1-alkyl-1,4-dihydro-4-oxo-7-pyridinyl-3-quinolinecarboxylic acids.
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