Hydrochloric Acid → 5-Oxo-1-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)pyrrolidin-3-carboxylic acid

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Reaction Steps

An aqueous solution (0.1 ml) of lithium hydroxide monohydrate (8.62 mg, 0.206 mmol) was added to a solution of 5-oxo-1-(3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)pyrrolidin-3-carboxylic acid methyl ester (40 mg, 0.137 mmol) in methanol (0.8 ml) and the mixture was stirred overnight at room temperature. The reaction solution was neutralized by adding 1N hydrochloric acid (0.206 ml), methanol was removed under reduced pressure, the obtained residue was triturated with water and the insoluble material was collected by filtration and dried to yield 32.9 mg (87%) of the title compound in the form of a colorless solid.

Provenance & Evidence