반응 #9894

반응 방정식

NBS

undec-10-en-1-ol

triphenylphosphine

→

11-bromo-undec-1-ene

수율 82.3%

용매

DMF

반응 조건

후처리

1. 1
   기타the reaction was quenched with methanol (0.5 mL)
2. 2
   workup.ADDITIONThe solution was diluted with ether (80 mL)
3. 3
   세척washed with water, saturated aqueous NaHCO3 and brine successively
4. 4
   기타The organic layer was dried
5. 5
   농축concentrated
6. 6
   기타The residue was purified by flash chromatography on silica gel
7. 7
   세척eluting with hexane

실험 절차

To a solution of undec-10-en-1-ol (0.86 g, 5.0 mmol) in DMF (15 mL) was added triphenylphosphine (1.46 g, 5.6 mmol). The solution was cooled to 0° C. and NBS (0.96 g, 5.4 mmol) was added in portions. After stirring for 30 min at room temperature, the reaction was quenched with methanol (0.5 mL). The solution was diluted with ether (80 mL), washed with water, saturated aqueous NaHCO3 and brine successively. The organic layer was dried and concentrated. The residue was purified by flash chromatography on silica gel, eluting with hexane to afford 11-bromo-undec-1-ene (0.96 g, 82%) as a colorless oil: 1H NMR (300 MHz, CDCl3) δ 5.79 (1H, m), 4.93 (2H, m), 3.38 (2H, t, J=6.9 Hz), 2.02 (2H, m), 1.83 (2H, m), 1.20–1.55 (12H, m); 13C NMR (75 MHz, CDCl3) δ 139.36, 114.33, 34.27, 33.99, 33.01, 29.57×2, 29.27, 29.09, 28.94, 28.35.

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