Hydrochloric Acid → HCID 13157209, compound

Methyl 5-bromo-2-oxo-1-phenyl-1,2-dihydropyridine-3-carboxylate (0.554 g, 1.80 mmol) was dissolved in dioxane (10.5 mL) then diluted with water (3.5 mL). 2N aqueous sodium hydroxide solution (0.944 ml, 1.89 mmol) was slowly added to the mixture. The reaction mixture was stirred at room temperature overnight, then concentrated under vacuum to remove the dioxane followed by dilution with water. This aqueous layer was acidified with 1N aqueous hydrochloric acid (1.89 mL, 1.89 mmol). A precipitate formed was collected on a glass frit, and washed with minimal water. The solid was dissolved in dichloromethane and then dried over sodium sulfate. This mixture was filtered, and the filtrate was concentrated under vacuum. The remaining residue was dried under high vacuum to afford 5-bromo-2-oxo-1-phenyl-1,2-dihydropyridine-3-carboxylic acid as a yellow solid (0.458 g, 1.56 mmol, 86.6% yield). MS (ESI pos. ion) m/z: 295 (MH+). Calc'd exact mass for C12H8BrNO3: 294.

1. concentrationconcentrated under vacuum
2. customto remove the dioxane
3. customA precipitate formed
4. customwas collected on a glass frit
5. washwashed with minimal water
6. dissolutionThe solid was dissolved in dichloromethane
7. dry with materialdried over sodium sulfate
8. filtrationThis mixture was filtered
9. concentrationthe filtrate was concentrated under vacuum
10. customThe remaining residue was dried under high vacuum

ORD record

ord-3e89e68089b94c978a999f34a47260d6

Source dataset

uspto-grants-2012_01

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08088794B2