There is described a process for the production of a 1,4-dihydro-4-oxo-quinoline-2-carboxylic acid. or a salt, ester or amide thereof, which comprises cyclisation of a corresponding 2-aminobenzoyl pyruvic acid or an ester thereof, and if desired or necessary converting the resulting product to an appropriate salt, ester or amide thereof, or vice versa.
本发明描述了一种 1,4-二氢-4-氧代
喹啉-2-
羧酸或其盐、酯或酰胺的生产工艺,该工艺包括相应的 2-
氨基苯甲酰基
丙酮酸或其酯的环化,如果需要或必要,将所得产物转化为其适当的盐、酯或酰胺,反之亦然。