Benzoyl Peroxide → 1-Fluoro-2-phthalimido-5-bromo-3-pentene

反応式

[F:1][CH2:2][CH:3]([N:7]1[C:11](=[O:12])[C:10]2=[CH:13][CH:14]=[CH:15][CH:16]=[C:9]2[C:8]1=[O:17])[CH:4]=[CH:5][CH3:6].[Br:18]N1C(=O)CCC1=O.C(OOC(=O)C1C=CC=CC=1)(=O)C1C=CC=CC=1>C(Cl)(Cl)(Cl)Cl>[F:1][CH2:2][CH:3]([N:7]1[C:8](=[O:17])[C:9]2=[CH:16][CH:15]=[CH:14][CH:13]=[C:10]2[C:11]1=[O:12])[CH:4]=[CH:5][CH2:6][Br:18]

参加物

実験手順

A mixture of 1-fluoro-2-phthalimido-3-pentene (800 mg, 3.4 mmoles) prepared as in Step C above, N-bromosuccinimide (612 mg. 3.4 mmoles), carbon tetrachloride (30 mL) and a few mg of benzoyl peroxide is heated under strong reflux during irradiation with a lamp (325 W) during one hour. After washing with water the organic phase is dried over magnesium sulfate and then concentrated under reduced pressure to yield 1-fluoro-2-phthalimido-5-bromo-3-pentene as a slightly yellow oil (1.06 g, quantitative yield).