2,3-Diisopropoxy-4-methoxybenzaldehyde → 2,3-Diisopropoxy-1-(1-hydroxyethyl)-4-methoxybenzene
반응식
[CH:1]([O:4][C:5]1[C:12]([O:13][CH:14]([CH3:16])[CH3:15])=[C:11]([O:17][CH3:18])[CH:10]=[CH:9][C:6]=1[CH:7]=[O:8])([CH3:3])[CH3:2].[CH3:19][Li]>C(OCC)C>[CH:1]([O:4][C:5]1[C:12]([O:13][CH:14]([CH3:16])[CH3:15])=[C:11]([O:17][CH3:18])[CH:10]=[CH:9][C:6]=1[CH:7]([OH:8])[CH3:19])([CH3:3])[CH3:2]참가 물질
4
실험 절차
To a solution of 22 (23.10 g, 91.56 mmol) in dry ethyl ether (150 mL) was added dropwise methyllithium (98.10 mL, 1.4 M in EtO2, 1.37.3 mmol) at 0° C. under nitrogen. The reaction mixture was stirred for 2 h allowing too reach room temperature. The reaction was slowly quenched with water, the phases were separated, and the aqueous phase was extracted with ethyl ether (3×150 mL). The combined organic solutions were dried over MgSO4 and concentrated over reduced pressure. Purification by flash column chromatography (silica gel, elution with hexanes/EtOAc: 80/20) provided the protected alcohol 20.62 g (76.77 mmol, 84%) as a pale yellow oil.