in methanol; diethyl ether; water 0.5 h; Ambient temperature;

1: 89 percent / conc. HCl, hydroxylammoniumchloride, Na2SO4.10 H2O / H2O / 0.03 h / Heating 2: 63 percent / conc. H2SO4 / 0.17 h / 75 °C 3: 92 percent / 10percent NaOH, 10percent aq. H2O2 / 0.17 h / 100 °C 4: 64 percent / methanol; H2O; diethyl ether / 0.5 h / Ambient temperature View Scheme

1: 92 percent / 10percent NaOH, 10percent aq. H2O2 / 0.17 h / 100 °C 2: 64 percent / methanol; H2O; diethyl ether / 0.5 h / Ambient temperature View Scheme

1: 63 percent / conc. H2SO4 / 0.17 h / 75 °C 2: 92 percent / 10percent NaOH, 10percent aq. H2O2 / 0.17 h / 100 °C 3: 64 percent / methanol; H2O; diethyl ether / 0.5 h / Ambient temperature View Scheme

1) 4 h, 140 deg C, 2) 2 h, 180 deg C;