Trifluoroacetic acid → 3-Methyl-4-phenoxybenzoic acid
反応式
[CH3:1][C:2]1[CH:3]=[C:4]([CH:12]=[CH:13][C:14]=1[O:15][C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1)[C:5]([O:7]C(C)(C)C)=[O:6].FC(F)(F)C(O)=O>ClCCl>[CH3:1][C:2]1[CH:3]=[C:4]([CH:12]=[CH:13][C:14]=1[O:15][C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1)[C:5]([OH:7])=[O:6]参加物
4
反応条件
- 温度
- 20 °C
実験手順
A mixture of tert-butyl 3-methyl-4-phenoxybenzoate (654 mg, 2.3 mmol), 2,2,2-trifluoroacetic acid (1 mL) and dichloromethane (4 mL) were stirred at 20° C. for 4 hours. The mixture was washed with water (10 mL×2). The organic phase was separated, dried over sodium sulfate, filtered and concentrated to give a residue. The residue was purified by column chromatography (silica gel, petroleum ether/ethyl acetate=2:1) to give 3-methyl-4-phenoxybenzoic acid as a white solid (200 mg, 38%). LRMS (M+H)− m/z: calcd 228.08. found 228.