Benzoyl Peroxide → Methyl 3-(bromomethyl)-2-fluorobenzoate

反応式

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

参加物

実験手順

To a solution of methyl 2-fluoro-3-methylbenzoate (13.8 g, 82.3 mmol) from Step A above and N-bromosuccinimide (16.0 g, 90.6 mmol) in carbon tetrachloride (82 mL) at room temperature was added a catalytic amount of benzoyl peroxide. The yellow mixture was heated under reflux until the reaction was complete by TLC (overnight) and then it was concentrated and purified by column chromatography (silica gel, 9:1 hexanes/ethyl acetate) to afford methyl 3-(bromomethyl)-2-fluorobenzoate as a light yellow oil (11.5 g, 56%): 1H NMR (500 MHz, CDCl3) δ 7.90 (t, J=8.0 Hz, 1H), 7.59 (t, J=7.5 Hz, 1H), 7.19 (t, J=7.5 Hz, 1H), 4.53 (s, 2H), 3.90 (s, 3H).