[Si:1]([O:8][CH2:9][CH2:10][CH2:11][CH2:12][C:13]1[CH:18]=[CH:17][C:16]([CH3:19])=[CH:15][CH:14]=1)([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].[Br:20]N1C(=O)CCC1=O.C(OOC(=O)C1C=CC=CC=1)(=O)C1C=CC=CC=1>C(Cl)(Cl)(Cl)Cl>[Si:1]([O:8][CH2:9][CH2:10][CH2:11][CH2:12][C:13]1[CH:14]=[CH:15][C:16]([CH2:19][Br:20])=[CH:17][CH:18]=1)([C:4]([CH3:6])([CH3:5])[CH3:7])([CH3:2])[CH3:3]To a 50 ml round bottom flask is charged 4-(4-methylphenyl)butyl tert-butyldimethylsilyl ether (0.25 g, 0.89 mmol), N-bromosuccinimide (0.158 g, 0.89 mmol), benzoyl peroxide (2.17 mg, 0.0.89 mmol) and 10 ml carbon tetrachloride. This mixture is refluxed overnight after which it is cooled and filtered. The filtrate is concentrated and the resulting crude residue purified by flash chromatography in ethyl acetate-hexanes to afford the product.
불러오는 중…