m-Chloroperbenzoic acid → Racemic trans-3-(3-bromophenyl)oxiranemethanol
反応式
ClC1C=CC=C(C(OO)=[O:9])C=1.[Br:12][C:13]1[CH:14]=[C:15](/[CH:19]=[CH:20]/[CH2:21][OH:22])[CH:16]=[CH:17][CH:18]=1>ClCCl>[Br:12][C:13]1[CH:14]=[C:15]([C@@H:19]2[O:9][C@H:20]2[CH2:21][OH:22])[CH:16]=[CH:17][CH:18]=1参加物
4
実験手順
A magnetically stirred solution of m-chloroperbenzoic acid (3.57 g, 10.33 mmol) in dichloromethane (60.0 ml) at 25° C. was treated dropwise with a solution of trans-3-(3-bromophenyl)-2-propenol (2.0 g, 9.39 mmol) in dichloromethane (20.0 ml). After stirring. for 16 h the mixture was diluted with dichloromethane (200 ml), washed with aqueous 1M NaOH (2×200 ml), brine (2×200 ml) and dried (Na2SO4). Evaporation of the solvent in vacuo returned the crude epoxide as a pale yellow oil (2.06 g). Column chromatography (ethyl acetate-light petroleum (b.p. 40-60° C.), 3:7) provided the title compound (1.53 g, 71%) as a pale yellow oil.