Methanol → Methyl 4-bromo-2-fluoro-5-methylbenzoate

反応式

[Br:1][C:2]1[C:10]([CH3:11])=[CH:9][C:5]([C:6]([OH:8])=[O:7])=[C:4]([F:12])[CH:3]=1.O=S(Cl)Cl.[CH3:17]O>>[Br:1][C:2]1[C:10]([CH3:11])=[CH:9][C:5]([C:6]([O:8][CH3:17])=[O:7])=[C:4]([F:12])[CH:3]=1

参加物

反応物 3

HCID 887Methanol

HCID 24386Thionyl Chloride

HCID 341745874-Bromo-2-fluoro-5-methylbenzoic acid

生成物 1

HCID 66817979Methyl 4-bromo-2-fluoro-5-methylbenzoate

反応条件

温度: 80 °C

実験手順

To a solution of 4-bromo-2-fluoro-5-methylbenzoic acid (i-2a) (1.87 g, 8 mmol) in CH3OH (50 mL) at 0° C. was added SOCl2 (6 mL, 80 mmol) dropwise. Then the mixture was heated to 80° C. for 2 h. The solvent was removed in vacuo and the residue was diluted with EtOAc and washed with H2O, brine, dried over anhydrous Na2SO4, and concentrated. The resulting crude solid was washed with PE to give the title compound as a yellow solid. 1H NMR (400 MHz, CDCl3) δ 7.80 (1H, d), 7.37 (1H, d), 3.92 (3H, s), 2.39 (3H, s).