1.1: 20 °C 2.1: sodium azide / N,N-dimethyl-formamide / 70 °C 3.1: magnesium; methanol / 3 h / 20 °C / |Inert atmosphere 3.2: Amberlyst 15 ion exchange resin / 0.17 h / 20 °C / |Inert atmosphere 4.1: hydrogen; palladium 10 on activated carbon / methanol / 2 h / 20 °C View Scheme

1: 20 °C 2: sodium azide / N,N-dimethyl-formamide / 70 °C 3: hydrogen; palladium on activated charcoal / ethyl acetate / 20 °C View Scheme

1: 20 °C 2: sodium azide / N,N-dimethyl-formamide / 70 °C View Scheme

1.1: 20 °C 2.1: sodium azide / N,N-dimethyl-formamide / 70 °C 3.1: magnesium; methanol / 3 h / 20 °C / |Inert atmosphere 3.2: Amberlyst 15 ion exchange resin / 0.17 h / 20 °C / |Inert atmosphere View Scheme