Hydrochloric Acid → HCID 19008591, compound

Participants

Reaction Steps

Ethyl 7-(2-chloro-4-trifluoromethylphenoxy)-2,4-dimethyl-4-methyl-3,4-dihydro-3-oxo-2H-1,4-benzoxazine-2-carboxylate (Compound 7) (1.1 g) was dissolved in methanol (10 ml), 1N sodium hydroxide (3 ml) was added thereto, and the mixture was stirred at room temperature for 2 hours. Then 1N hydrochloric acid (5 ml) was added, the solvent was evaporated under a reduced pressure, and the residue was extracted twice with ethyl acetate (20 ml). The extract was washed with water and then with saturated aqueous sodium chloride, and dried over magnesium sulfate, followed by an evaporation of the solvent under a reduced pressure to give 0.9 g of the title compound (colorless oil).

Provenance & Evidence