Acetic Acid → HCID 178481859, compound

Participants

Reaction Conditions

Reaction Steps

92.1 g (0.5 mole) of ethyl 4,4,4-trifluoroacetoacetate was dissolved in 60.1 g (1.0 mole) of acetic acid. The solution was cooled to 10° C. or lower with stirring. Thereto was dropwise added, in 1 hour, 65.8 g (0.5 mole) of a 35% aqueous methylhydrazine solution. After the dropwise addition, the mixture was stirred at room temperature for 1 hour and successively at 80° C. for 5 hours to give rise to a reaction. After the reaction, the mixture was cooled to room temperature. Thereto were added 150 ml of toluene, 600 ml of water and 48 g (1.2 moles) of sodium hydroxide. After phase separation, 154 g (1.5 moles) of 35% hydrochloric acid was added to the aqueous layer. The resulting crystals were collected by filtration, washed with 50 ml of water twice, and dried in a hot-air drier, to obtain 71.8 g (yield: 86.5%) of a title compound as light yellow crystals.

Provenance & Evidence