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.
4-(4-
吡啶基)异酸酐是通过将2-
氨基-4-(4-
吡啶基)
苯甲酸(即酸、酯或盐)与
光气反应制备而成,最好使用气态
光气。该产品在制备抗菌的1-烷基-1,4-二氢-4-氧代-7-
吡啶基-
3-喹啉羧酸方面特别有用。