1: NaOH / H2O / Heating 2: hydroxylamine hydrochloride / aq. NaOH / 0.5 h / 60 °C 3: acetic anhydride / 0.08 h / Heating 4: ZnCl2, HCl / diethyl ether / 5 h / 0 °C 5: 2.0 g / aq. potassium persulphate / aq. KOH / Ambient temperature 6: K2CO3 / acetone / 50 h / Heating 7: 1) Na, 2) conc.hydrochloric acid / 1) r.t., 2) heating, 15-20 min. View Scheme

1: NaOH / H2O / Heating 2: hydroxylamine hydrochloride / aq. NaOH / 0.5 h / 60 °C 3: acetic anhydride / 0.08 h / Heating View Scheme

sodium hydroxide in water Heating;

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