1.1: palladium on activated charcoal / methanol / 0.17 h / 20 °C / |Inert atmosphere 1.2: 4 h / |Inert atmosphere 2.1: polyphosphoric acid / dichloromethane / 4 h / |Inert atmosphere; |Reflux View Scheme

1: With palladium on activated charcoal in methanol T=20°C; 0.166667 h; Inert atmosphere; 2: With hydrogen in methanol 4 h; Inert atmosphere;

1.1: palladium on activated charcoal / methanol / 0.17 h / 20 °C / |Inert atmosphere 1.2: 4 h / |Inert atmosphere 2.1: polyphosphoric acid / dichloromethane / 4 h / |Inert atmosphere; |Reflux 3.1: pyridine; hydroxylamine hydrochloride / 4 h / 20 °C / |Inert atmosphere View Scheme