Methyl 4-(benzyloxy)-3-chlorobenzoate → (4-Benzyloxy-3-chloro-phenyl)-methanol
反応式
C[O:2][C:3](=O)[C:4]1[CH:9]=[CH:8][C:7]([O:10][CH2:11][C:12]2[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=2)=[C:6]([Cl:18])[CH:5]=1.[H-].[Al+3].[Li+].[H-].[H-].[H-]>C1COCC1>[CH2:11]([O:10][C:7]1[CH:8]=[CH:9][C:4]([CH2:3][OH:2])=[CH:5][C:6]=1[Cl:18])[C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=1参加物
4
実験手順
A solution of 4-benzyloxy-3-chloro-benzoic acid methyl ester (CAB02121, 4.15 g, 15.0 mmol) in THF (30 mL) was added slowly with a syringe to a suspension of lithium aluminium hydride (1.0 g, 26.3 mmol) in THF (30 mL). The reaction mixture was stirred for 30 minutes at room temperature and then carefully quenched by addition of 2N sodium hydroxide solution in water. After 20 minutes stirring the colour of the mixture turned from grey to white. The white precipitate was filtered off, the filtrate was dried over sodium sulphate and concentrated under reduced pressure to give an colourless oil, which was used without further purification. Yield: 3.61 g (97%). 1H-NMR (400 MHz, CDCl3) δ=2.12 (s, 1H, —OH), 4.56 (s, 2H), 5.16 (s, 2H), 6.93 (d, J=8.6 Hz, 1H), 7.14 (dd, J=8.6, 2.3 Hz, 1H), 7.31-7.48 (m, 6H).