1.1: sodium azide / N,N-dimethyl-formamide / 70 °C 2.1: magnesium; methanol / 3 h / 20 °C / |Inert atmosphere 2.2: Amberlyst 15 ion exchange resin / 0.17 h / 20 °C / |Inert atmosphere 3.1: hydrogen; palladium 10 on activated carbon / methanol / 2 h / 20 °C View Scheme

1: 44 percent / potassium sulfate, ferric chloride / CH2Cl2 / 16 h / Ambient temperature 2: NaOMe / methanol / 1 h / Ambient temperature View Scheme

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

sodium azide in N,N-dimethyl-formamide T=70°C;

1.1: sodium azide / N,N-dimethyl-formamide / 70 °C 2.1: magnesium; methanol / 3 h / 20 °C / |Inert atmosphere 2.2: Amberlyst 15 ion exchange resin / 0.17 h / 20 °C / |Inert atmosphere View Scheme

anhydrous potassium sulfate; iron(III) chloride in dichloromethane 16 h; Ambient temperature;