Carbon tetrabromide → 1-Bromo-9-octadecene
反応式
C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[CH2:20](O)[CH2:21][CH2:22][CH2:23][CH2:24][CH2:25][CH2:26][CH2:27]/[CH:28]=[CH:29]\[CH2:30][CH2:31][CH2:32][CH2:33][CH2:34][CH2:35][CH2:36][CH3:37].C(Br)(Br)(Br)[Br:40]>ClCCl>[Br:40][CH2:20][CH2:21][CH2:22][CH2:23][CH2:24][CH2:25][CH2:26][CH2:27][CH:28]=[CH:29][CH2:30][CH2:31][CH2:32][CH2:33][CH2:34][CH2:35][CH2:36][CH3:37]参加物
5
実験手順
This example illustrates a synthesis of 1-(9,10-Oxidoctadecyl)-3,7-dimethylxanthine (inventive compound no. 2541). Triphenylphosphine (5.24 g; 20 mmol) was added in portions to a solution of oleyl alcohol (5.37 g; 20 mmol) and carbontetrabromide (6.63 g; 20 mmol) in 400 mL of dichloromethane and stirred for an hour at room temperature. The solvent was removed under reduced pressure and the residue extracted with hexane (3×200 mL). Further purification was done by flash chromatography over silica gel using hexane as eluant to yield 5.82 g (88% yield) of 1-bromo-9-octadecene.