Lithium Hydroxide → 3-Cyclopentyl-2-(3-nitro-phenyl)-propionic acid
反応式
C[O:2][C:3](=[O:20])[CH:4]([C:11]1[CH:16]=[CH:15][CH:14]=[C:13]([N+:17]([O-:19])=[O:18])[CH:12]=1)[CH2:5][CH:6]1[CH2:10][CH2:9][CH2:8][CH2:7]1.[OH-].[Li+]>O1CCCC1.O>[CH:6]1([CH2:5][CH:4]([C:11]2[CH:16]=[CH:15][CH:14]=[C:13]([N+:17]([O-:19])=[O:18])[CH:12]=2)[C:3]([OH:20])=[O:2])[CH2:10][CH2:9][CH2:8][CH2:7]1参加物
4
反応条件
- 温度
- 25 °C
実験手順
A solution of 3-cyclopentyl-2-(3-nitro-phenyl)-propionic acid methyl ester (0.55 g, 2.0 mmol) in tetrahydrofuran/water (10 mL, 3:1) was treated with lithium hydroxide (185 mg, 4.40 mmol). The reaction was stirred at 25° C. for 48 h. The tetrahydrofuran was then removed in vacuo. The residue was diluted with water (25 mL) and extracted with ether (1×20 mL). The aqueous layer was acidified to pH=2 with a 3N aqueous hydrochloric acid solution. The product was extracted into methylene chloride (3×25 mL). The combined organic layers were washed with a saturated aqueous sodium chloride solution (2×25 mL), dried over sodium sulfate, filtered, and concentrated in vacuo to give 3-cyclopentyl-2-(3-nitro-phenyl)-propionic acid (0.48 g, 91.9%) as a tan solid: mp 95-99° C.; EI-HRMS m/e calcd for C14H17NO4(M+) 263.1157, found 263.1156.