Hydrochloric Acid → (R)-1-(2-hydroxypropyl)-6-oxo-1,6-dihydropyridine-3-carboxylic acid

Participants

Reaction Conditions

Reaction Steps

A solution of (R)-methyl 1-(2-hydroxypropyl)-6-oxo-1,6-dihydropyridine-3-carboxylate (508 mg, 2.405 mmol) in 1,4-dioxane (12 mL) and MeOH (4.00 mL) was treated with aqueous sodium hydroxide, 5.0 M (0.962 mL, 4.81 mmol). The reaction was stirred at 23° C. After 20 h, the reaction was neutralized to pH=6.0 with 2 N HCl, and concentrated in vacuo. The residue was azeotroped with toluene (3×10 mL), suspended in a 1:1 MeOH:DCM solution (25 mL), and the white NaCl residue was removed by filtration. The filtrate was concentrated, affording (R)-1-(2-hydroxypropyl)-6-oxo-1,6-dihydropyridine-3-carboxylic acid as a white solid. MS (ESI pos. ion) m/z: 198.1 (M+1).

Provenance & Evidence