methyl 7-bromo-5-methyl-4-oxo-1,4-dihydroquinoline-2-carboxylate 、
sodium hydroxide 、
chlorocarbene 在
Sodium hydroxide ethanol water 、
chlorocarbene 作用下,
以
水 为溶剂,
反应 0.17h,
以to give 7-bromo-5-methyl-4-oxo-1,4-dihydroquinoline-2-carboxylic acid (0.35 g), mp 299° C. (dec.)的产率得到7-bromo-5-methyl-4-oxo-1,4-dihydroquinoline-2-carboxylic acid