**4.3 Synthesis of (1-(4-nitrobenzyl)-1H-1,2,3-triazole-4-yl) methanol**

P-Nitrobenzyl bromide 0.216 g (1.0 mmol), sodium azide 0.091 g (1.4 mmol) was suspended in polyethylene glycol-400 (5 mL). The reaction mixture was stirred for 10 min at 25°C. After completion of the reaction (monitored by TLC), the product was extracted with EtOAc and the organic extract was dried. The crude product was recrystallized from ethanol to yield the desired product.

Yield: 72%, MF/FWt: C10H10N4O3/234.08, MP: 134–136°C.

IR (cm<sup>−</sup><sup>1</sup> ): 3643, 2950, 1609, 1508, 1430, 1265, 1233, 867.

1 H NMR (300 MHz, CDCl3, δ ppm): 8.13–8.15 (d,2H), 7.08–7.10 (d,2H), (s,1H, triazole), 4.73 (s,2H), 4.70 (s,2H), 3.65 (s,1H).
