Boron trifluoride etherate → 2-Hydroxy-3-linoleyloxypropylbromide
反応式
[CH2:1]([CH:3]1[O:5][CH2:4]1)[Br:2].[CH2:6]([OH:24])[CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13]/[CH:14]=[CH:15]\[CH2:16]/[CH:17]=[CH:18]\[CH2:19][CH2:20][CH2:21][CH2:22][CH3:23].B(F)(F)F.CCOCC>C(Cl)Cl>[OH:5][CH:3]([CH2:4][O:24][CH2:6][CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13]/[CH:14]=[CH:15]\[CH2:16]/[CH:17]=[CH:18]\[CH2:19][CH2:20][CH2:21][CH2:22][CH3:23])[CH2:1][Br:2]参加物
5
反応条件
- 温度
- 40 °C
実験手順
A 500 ml round bottom flask was charged with epibromohydrin (5.8 g, 42 mmol), linoleyl alcohol (15 g, 56 mmol), a stir bar, and then flushed with nitrogen. Anhydrous DCM (250 ml) was added via cannula, followed by BF3.Et2O (0.53 ml, 4.2 mmol), and stirred at 40° C. for 3 hours. Progress of reaction was monitored by TLC to ensure no epoxide was remaining. The reaction mixture was transferred to a 500 ml separatory funnel with DCM (2×50 ml), washed with NaHCO3 (2×200 ml), water (200 ml), brine (200 ml), dried with MgSO4, and solvent evaporated. The crude product was purified using column chromatography on silica gel (300 g) with 5-15% ether gradient in hexanes to yield 12.6 g.