Sodium Azide → 3,5-didecoxybenzyl Azide

Participants

Reaction Steps

3,5-Didecoxybenzyl chloride (14.4 g, 32.8 mmol) was dissolved in DMF (50 mL) in a 250 mL RBF. Sodium azide (4.26 g, 65.6 mmol) and a magnetic stir bar were added to the RBF. The RBF was heated to just below boiling of the DMF using a heat gun. The reaction mixture was then stirred at room temperature until cool to the touch. Heating and cooling were repeated 3 times. Thin layer chromatography in hexanes showed the presence of a starting material. A heating mantel was used to gently heat the RBF. After 1 hour, thin layer chromatography showed no starting material present. The contents of the RBF were transferred to a separatory funnel. Ether (250 mL) and distilled H2O (250 mL) were added to the funnel. The aqueous layer was washed 2 times with ether (250 mL). The ether layers were combined and washed 2 times with saturated ammonium chloride solution (125 mL) and once with saturated sodium chloride solution (125 mL). The ether layer was then dried with magnesium sulfate, gravity filtered and concentrated using rotary evaporation. High vacuum was then used to remove trace amounts of the ether giving. There was a 13.6 g yield or a 93.1% yield of the derivative. The NMR characterization data for this derivative is as follows. 1NMR (300 MHz, CDCl3): 0.88 (t, J=6.6, 6H, CH2CH3), 1.27-1.43 (m, 28H, CH2(CH2)7), 1.76 (p, J=6.6, 4H, OCH2CH2), 3.92 (t, J=6.6, 4H, OCH2), 4.21 (s, 2H, ArCH2N3), 6.42-6.44 (m, 3H, ArH). 13C NMR (75 MHZ, CDCl3): 14.23, 22.79, 26.13, 29.31, 29.45, 29.49, 29.68, 29.71, 32.01, 55.01, 65.97, 68.19, 101.08, 106.52, 137.45, 160.68.

Provenance & Evidence