2.3. Synthesis of 2-Azidoethylamine

2-Bromoethylamine hydrobromide (8.54 g, 41.7 mmol) and 8.46 g (130 mmol) of sodium azide were dissolved in 30 mL of water which was previously deoxygenized in a nitrogen gas atmosphere. The mixture was stirred at 80 °C under nitrogen atmosphere for 16 h. The reaction was quenched with 15.5 M aqueous KOH solution (15 mL). The product was dried over Na₂SO₄ after extraction three times with Et₂O. Yield: 3.12 g (36.2 mmol; 87%). ¹H NMR (300 MHz; CDCl₃) δH: 3.36 (t, 2H), 2.88 (t, 2H), 1.42 (s, 1H) (Figure S2).