water; triphenylphosphine in tetrahydrofuran 12 h;

1: 84 percent / Et3N / CH2Cl2 / 1 h / Ambient temperature 2: 80 percent / NaN3 / dimethylformamide / 12 h / Ambient temperature 3: Ph3P, H2O / tetrahydrofuran / 12 h View Scheme

1: 80 percent / NaN3 / dimethylformamide / 12 h / Ambient temperature 2: Ph3P, H2O / tetrahydrofuran / 12 h View Scheme

1: 100 percent / amberlyst H15 / methanol / 1 h / 45 °C 2: 84 percent / Et3N / CH2Cl2 / 1 h / Ambient temperature 3: 80 percent / NaN3 / dimethylformamide / 12 h / Ambient temperature 4: Ph3P, H2O / tetrahydrofuran / 12 h View Scheme