Potassium Carbonate → Methyl 2,4-dichloro-(2-hydroxyiminobut-3-en-4-yl)benzoate

Participants

Reaction Steps

1.8 g (25.9 mmol) of hydroxylamine hydrochloride and 1.5 g (11.0 mmol) of potassium carbonate were added to 5.0 g (18.3 mmol) of methyl 2,4-dichloro-3-(2-oxobut-3-en-4-yl)benzoate in 160 ml of ethanol, and the reaction mixture was admixed with water until a clear solution was obtained. The mixture was heated under reflux for 3 hours and then cooled and the reaction mixture was taken up in 400 ml of water and extracted with ethyl acetate. The combined organic phases were dried and the solvent was removed. Methyl 2,4-dichloro-(2-hydroxyiminobut-3-en-4-yl)benzoate was obtained in quantitative yield.

Provenance & Evidence