sodium azide in N,N-dimethyl-formamide T=25°C; 20 h; Inert atmosphere;

1: sodium azide / N,N-dimethyl-formamide / 24 h / |Reflux; |Inert atmosphere 2: triethylamine / tetrahydrofuran / 2 h / 20 °C 3: methanol / 3 Torr / |Reflux; |Inert atmosphere View Scheme

in methanol P=3 Torr; RefluxInert atmosphere;

1: 2,2'-azo-bisisobutyronitrile / 1,4-dioxane / 24 h / 25 - 75 °C / Inert atmosphere 2: carbon tetrabromide; triphenylphosphine / dichloromethane / 1 h / 25 °C / Inert atmosphere 3: sodium azide / N,N-dimethyl-formamide / 20 h / 25 °C / Inert atmosphere View Scheme

1: carbon tetrabromide; triphenylphosphine / dichloromethane / 1 h / 25 °C / Inert atmosphere 2: sodium azide / N,N-dimethyl-formamide / 20 h / 25 °C / Inert atmosphere View Scheme

1: triethylamine / tetrahydrofuran / 2 h / 20 °C 2: methanol / 3 Torr / |Reflux; |Inert atmosphere View Scheme

hydrogenchloride in methanol Inert atmosphereReflux;