Hydrochloric Acid → 2-(4-Methyl-2-phenyl-1,3-oxazol-5-yl)ethanol

反応式

C([O:3][C:4](=O)[CH2:5][C:6]1[O:10][C:9]([C:11]2[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=2)=[N:8][C:7]=1[CH3:17])C.[Li+].[BH4-].Cl>C1COCC1>[CH3:17][C:7]1[N:8]=[C:9]([C:11]2[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=2)[O:10][C:6]=1[CH2:5][CH2:4][OH:3]

参加物

実験手順

Ethyl(4-methyl-2-phenyl-1,3-oxazol-5-yl)acetate (0.922 g, 3.76 mmol) in THF (6 mL) at rt, was added LiBH4 2M/THF (9.41 mL, 4.70 mmol). The reaction was stirred overnight at rt, then treated with 2 N HCl until pH 7. The solvent THF was removed under reduced pressure, EtOAc was added, and phases separated. The combined organic extracts were dried over MgSO4 and solvent concentrated in vacuo. The crude material was purified by Biotage using a gradient of 10 to 100% EtOAc/Hexane as solvent mixture. This gave 2-(4-methyl-2-phenyl-1,3-oxazol-5-yl)ethanol (0.193 g, 25% yield) as colorless oil. ES-MS m/z 204.2 (MH)+); HPLC RT (min.) 2.02; 1H NMR (Acetone-d6) δ 7.98-7.95 (m, 2H), 7.52-7.42 (m, 3H), 3.95 (s br, 1H), 3.82 (t, 2H)m, 2.90 (t, 2H), 2.13 (s, 3H).