Lithium hydroxide, monohydrate → HCID 67532234, compound

Participants

Reaction Steps

1.5 g (4.54 mmol) of ethyl 2-oxo-1-[(2,2,2-trifluoroethoxy)methyl]-1,2-dihydroquinoxaline-3-carboxylate and 0.28 g (6.81 mmol) of lithium hydroxide monohydrate were dissolved in a solvent mixture of ethanol (30 mL) and water (30 mL), and the solution was stirred for 2 hours at room temperature. The reaction solution was concentrated to a half the original volume, and then water was added to the residue. The mixture was acidified using 10% hydrochloric acid, and then extracted with ethyl acetate. The organic layer was washed with water, dried over anhydrous sodium sulfate, and concentrated, to obtain 2.4 g (yield: 53%) of 2-oxo-1-[(2,2,2-trifluoroethoxy)methyl]-1,2-dihydroquinoxaline-3-carboxylic acid as a white powder.

Provenance & Evidence