Borane → 1,2-Benzenediethanol

反応式

[C:1]([CH2:4][C:5]1[CH:10]=[CH:9][CH:8]=[CH:7][C:6]=1[CH2:11][C:12](O)=[O:13])(O)=[O:2].B.[H][H]>C1COCC1>[OH:2][CH2:1][CH2:4][C:5]1[CH:10]=[CH:9][CH:8]=[CH:7][C:6]=1[CH2:11][CH2:12][OH:13]

参加物

反応条件

温度: 0 °C

実験手順

(2-Carboxymethyl-phenyl)-acetic acid (5.0 g/25 mmol) was dissolved in THF (100 mL) and cooled to 0° C. Borane (1 M in THF, 100 mL/100 mmol) was then added dropwise while stirring (hydrogen evolution). The reaction was left to stir a 0° C. for four hours then carefully quenched by the addition of water (ca. 20 mL). The reaction was partitioned between diethyl ether (200 mL) and water (200 mL). The organic layer was extracted with an additional portion of ether (100 mL) and the combined organics washed with brine (100 mL), dried over magnesium sulfate, filtered and concentrated. To give 2-[2-(2-Hydroxy-ethyl)-phenyl]-ethanol (3.3 g/80%). 1H NMR (400 MHz, CDCl3) δ 7.2 (m, 4H), 3.9 (t, J=6.8 Hz, 4H), 2.95 (t, J=6.8 Hz, 4H).