hydroxylamine hydrochloride; triethylamine in ethanol; water 54 h; Heating;

1.1: n-BuLi / hexane; diethyl ether / 2 h / 0 °C 1.2: diethyl ether; hexane / 20 °C 1.3: 76 percent / aq. H2O2 / 4 h / Heating 2.1: 63 percent / NH2OH*HCl; Et3N / ethanol; H2O / 54 h / Heating View Scheme

1.1: 90 percent / TsOH / toluene / 6 h / Heating 2.1: n-BuLi / hexane; diethyl ether / 2 h / 0 °C 2.2: diethyl ether; hexane / 20 °C 2.3: 76 percent / aq. H2O2 / 4 h / Heating 3.1: 63 percent / NH2OH*HCl; Et3N / ethanol; H2O / 54 h / Heating View Scheme