Boron tribromide → HCID 18329463、化合物
反応式
B(Br)(Br)Br.[CH:5]([C:8]1[C:16]([O:17]C)=[CH:15][CH:14]=[CH:13][C:9]=1[C:10]([OH:12])=[O:11])([CH3:7])[CH3:6]>ClCCl>[OH:17][C:16]1[C:8]([CH:5]([CH3:7])[CH3:6])=[C:9]([CH:13]=[CH:14][CH:15]=1)[C:10]([OH:12])=[O:11]参加物
4
反応条件
- 温度
- 0 °C
実験手順
A solution of 1M boron tribromide in dichloromethane (15 mL, 15 mmol) was added dropwise to a solution of 2-isopropyl-3-methoxybenzoic acid in dichloromethane. After stirring for 2 hours, the reaction mixture was cooled to 0° C., quenched with water, and the layers were separated. The aqueous layer was extracted with dichloromethane. The combined organic extracts were dried over anhydrous sodium sulfate and concentrated in vacuo. Purification of the residue by silica gel flash chromatography, eluting with dichloromethane/methanol and 1% acetic acid, gave 3-hydroxy-2-isopropylbenzoic acid as a white crystalline solid (1.32 g, 97.5%).