Bromine → (3-Bromo-4-methylsulfanyl-phenyl)-acetic acid methyl ester
반응식
[CH3:1][O:2][C:3](=[O:13])[CH2:4][C:5]1[CH:10]=[CH:9][C:8]([S:11][CH3:12])=[CH:7][CH:6]=1.[Br:14]Br>C(Cl)(Cl)(Cl)Cl>[CH3:1][O:2][C:3](=[O:13])[CH2:4][C:5]1[CH:10]=[CH:9][C:8]([S:11][CH3:12])=[C:7]([Br:14])[CH:6]=1참가 물질
4
반응 조건
- 온도
- 25 °C
실험 절차
A solution of (4-methylsulfanyl-phenyl)-acetic acid methyl ester (5.11 g, 26.03 mmol) in carbon tetrachloride (130 mL) was slowly treated with bromine (1.74 mL, 33.84 mmol). The reaction mixture was stirred at 25° C. for 4 h, at which time, thin layer chromatography still indicated the presence of a substantial amount of starting material. The reaction mixture was treated with more bromine (1.74 mL, 33.84 mmol). The reaction mixture was stirred an additional 4 h at 25° C. and then quenched with a 10% aqueous sodium bisulfite solution (150 mL). The reaction mixture was concentrated in vacuo to remove carbon tetrachloride. The resulting aqueous layer was extracted with ethyl acetate (3×150 mL). The combined organic layers were dried over sodium sulfate, filtered and concentrated in vacuo. Flash chromatography (Merck Silica gel 60, 70-230 mesh, 9/1 hexanes/ethyl acetate) afforded (3-bromo-4-methylsulfanyl-phenyl)-acetic acid methyl ester (6.10 g, 85%) as a light yellow oil: EI-HRMS m/e calcd for C10H11BrO2S (M+) 273.9663, found 273.9661.