1: pyridinium chlorochromate / CH2Cl2 / 3 h 2: sodium acetate / acetic anhydride / Heating 3: NaOH / H2O / Heating 4: hydroxylamine hydrochloride / aq. NaOH / 0.5 h / 60 °C 5: acetic anhydride / 0.08 h / Heating 6: ZnCl2, HCl / diethyl ether / 5 h / 0 °C 7: 2.0 g / aq. potassium persulphate / aq. KOH / Ambient temperature 8: K2CO3 / acetone / 50 h / Heating 9: 1) Na, 2) conc.hydrochloric acid / 1) r.t., 2) heating, 15-20 min. View Scheme

1: ZnCl2, HCl / diethyl ether / 5 h / 0 °C 2: 2.0 g / aq. potassium persulphate / aq. KOH / Ambient temperature 3: K2CO3 / acetone / 50 h / Heating 4: 1) Na, 2) conc.hydrochloric acid / 1) r.t., 2) heating, 15-20 min. View Scheme

1: lithium aluminium hydride / diethyl ether / 3 h / Heating 2: pyridinium chlorochromate / CH2Cl2 / 3 h 3: sodium acetate / acetic anhydride / Heating 4: NaOH / H2O / Heating 5: hydroxylamine hydrochloride / aq. NaOH / 0.5 h / 60 °C 6: acetic anhydride / 0.08 h / Heating 7: ZnCl2, HCl / diethyl ether / 5 h / 0 °C 8: 2.0 g / aq. potassium persulphate / aq. KOH / Ambient temperature 9: K2CO3 / acetone / 50 h / Heating 10: 1) Na, 2) conc.hydrochloric acid / 1) r.t., 2) heating, 15-20 min. View Scheme

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

1: 2.0 g / aq. potassium persulphate / aq. KOH / Ambient temperature 2: K2CO3 / acetone / 50 h / Heating 3: 1) Na, 2) conc.hydrochloric acid / 1) r.t., 2) heating, 15-20 min. View Scheme

1: K2CO3 / acetone / 50 h / Heating 2: 1) Na, 2) conc.hydrochloric acid / 1) r.t., 2) heating, 15-20 min. View Scheme

1: sodium acetate / acetic anhydride / Heating 2: NaOH / H2O / Heating 3: hydroxylamine hydrochloride / aq. NaOH / 0.5 h / 60 °C 4: acetic anhydride / 0.08 h / Heating 5: ZnCl2, HCl / diethyl ether / 5 h / 0 °C 6: 2.0 g / aq. potassium persulphate / aq. KOH / Ambient temperature 7: K2CO3 / acetone / 50 h / Heating 8: 1) Na, 2) conc.hydrochloric acid / 1) r.t., 2) heating, 15-20 min. View Scheme

hydrogenchloride; sodium 1) r.t., 2) heating, 15-20 min.; Multistep reaction;