Carbon tetrabromide → HCID 10384209、化合物
反応式
[F:1][C:2]([F:20])([F:19])[C:3]1[CH:4]=[C:5]([CH:13](O)[C:14]([O:16][CH3:17])=[O:15])[CH:6]=[C:7]([C:9]([F:12])([F:11])[F:10])[CH:8]=1.C(Br)(Br)(Br)[Br:22].C1C=CC(P(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>C(Cl)Cl>[F:1][C:2]([F:20])([F:19])[C:3]1[CH:4]=[C:5]([CH:13]([Br:22])[C:14]([O:16][CH3:17])=[O:15])[CH:6]=[C:7]([C:9]([F:12])([F:11])[F:10])[CH:8]=1参加物
5
反応条件
- 温度
- 0 °C
実験手順
Methyl [3,5-bis(trifluoromethyl)phenyl](hydroxy)acetate (300 mg, 0.993 mmol) was dissolved in CH2Cl2 (10 mL). The solution was cooled to 0° C. and CBr4 (659 mg, 1.986 mmol) was added followed by PPh3 (521 mg, 1.986 mmol). After 1 hour, the reaction was warmed to room temperature and stirred at room temperature for 1 hour. The reaction was filtered through a short plug of silica gel with CH2Cl2. The filtrate was concentrated and the residue was purified by flash chromatography with 5% EtOAc/hexanes to afford methyl [3,5-bis(trifluoromethyl)phenyl](bromo)acetate. Rf=0.24 (5% EtOAc/hexanes). 1H NMR (CDCl3, 500 MHz) δ 8.02 (s, 2H), 7.87 (s, 1H), 5.41 (s, 1H), 3.83 (s, 3H).