sodium hydroxide; hydroxylamine hydrochloride in ethanol; water T=20°C; Heating / reflux;

1: in H20; ethanol T=20°C; 2: With sodium hydroxide in H20

1.1: n-butyllithium / tetrahydrofuran; hexane / 1 h / -78 °C / |Inert atmosphere 1.2: 1 h / -78 °C / |Inert atmosphere 2.1: pyridinium chlorochromate / dichloromethane / 20 °C 3.1: hydroxylamine hydrochloride; pyridine / ethanol / 10 h / |Reflux View Scheme

1: pyridinium chlorochromate / dichloromethane / 20 °C 2: hydroxylamine hydrochloride; pyridine / ethanol / 10 h / |Reflux View Scheme