2,4,6-trichloro-1,3,5-triazine; triethylamine; N,N-dimethyl-formamide in dichloromethane T=-15°C;

triethylamine in dichloromethane 1 h; Ambient temperature;

1: triethylamine / dichloromethane / 20 °C 2: sodium hydrogencarbonate; water / methanol / 0.5 h / 0 °C 3: N-ethyl-N,N-diisopropylamine / dichloromethane / 0 - 20 °C 4: sodium azide / N,N-dimethyl-formamide / 24 h / 55 °C View Scheme

water in benzene 24 h; Ambient temperature;