Aluminium lithium hydride → 2,2-Bis(hexyloxy)propan-1-ol

関与物質

反応条件

反応手順

To a mixture of LiAlH4 (3.44 g, 90.5 mmol) in Et2O (200 mL) is added a solution of ester 3 (29.5 g, 82.3 mmol) in Et2O (100 mL). After addition, the mixture is refluxed for 6 hours. The reaction mixture is cooled to 0° C. and quenched with ethyl acetate (20 mL) and H2O (20 mL). The mixture is added to saturated potassium sodium tartrate (300 mL) and stirred at 23° C. for 12 hours. The mixture is extracted with Et2O (2×200 mL) and the combined organic layers are dried over anhydrous sodium sulfate. The solvent is removed and the residue is purified by silica gel chromatography (1→10% ethyl acetate/hexane) to give 2,2-bis(hexyloxy)propan-1-ol 4 (20.6 g, 94%) as a colorless oil: Rf (15% EtOAc/hexane)=0.20; IR (thin film, cm−1) 3430, 2955, 2929, 2859, 1467, 1378, 1244, 1155, 1112, 1064, 876; 1H NMR (600 MHz, C6D6) δ 3.58 (d, J=6.6 Hz, 2H), 3.43 (t, J=6.6 Hz, 4H), 1.58 (t, J=6.6 Hz, 1H), 1.53 (m, 4H), 1.36 (s, 3H), 1.34-1.22 (m, 12H), 0.88 (t, J=7.2 Hz, 6H); 13C NMR (150 MHz, C6D6) δ 101.0, 66.2, 61.3, 32.5, 30.9, 26.8, 23.4, 21.3, 14.6.

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