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

反応式

[CH3:1][C:2]1[N:3]=[C:4]([C:13]2[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=2)[O:5][C:6]=1[CH2:7][C:8](OCC)=[O:9].[Li+].[BH4-].Cl>C1COCC1>[CH3:1][C:2]1[N:3]=[C:4]([C:13]2[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=2)[O:5][C:6]=1[CH2:7][CH2:8][OH:9]

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 2N HCl until pH 7. The solvent THF was removed under reduced pressure, EtOAc was added, and phases separated. The combined organics 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. 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).