Hydroxyamine hydrochloride → Methyl 5-(4-bromophenyl)-3-methylisoxazole-4-carboxylate

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To a mixture of 2-(4-bromo-benzoyl)-3-oxo-butyric acid methyl ester (11 g, 39 mmol) in acetic acid (50 mL) was added hydroxylamine hydrochloride (2.66 g, 39 mmol), and the reaction was stirred at 115° C. for 1 hour. After cooling, aqueous workup provided the title compound, which was used directly in the hydrolysis step.

Herkunft & Nachweise