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methyl 2-oxo-1,2-dihydroquinoline-6-carboxylate; CAS No.: 68882-86-0; methyl 2-oxo-1,2-dihydroquinoline-6-carboxylate. PROPERTIES: Methyl 2-oxo-1,2-dihydroquinoline-6-carboxylate is a heterocyclic ester existing as pale yellow solid. It exhibits moderate thermal stability up to 60 C but degrades upon prolonged exposure to acidic or basic conditions. The compound shows good solubility in ethanol and acetone while being practically insoluble in water. Recommended storage involves tightly sealed containers in desiccators with molecular sieves. Safety data indicates moderate eye irritation potential requiring face shields during handling procedures outlined in manufacturer SDS sheets. APPLICATIONS: Methyl 2-oxo-1,2-dihydroquinoline-6-carboxylate acts as a key intermediate in the preparation of quinolone antibacterials as evidenced by pharmaceutical patents. Its versatile reactivity allows transformation into various nitrogen-containing scaffolds useful in combinatorial chemistry libraries reported in synthetic communications. Additionally, the compound functions as a building block for fluorescent brighteners for textile applications described in applied chemistry literature.