[H-].[Na+].[OH:3][CH2:4][CH:5]1[CH2:10][CH2:9][CH2:8][CH:7]([OH:11])[CH2:6]1.[CH2:12](Br)[C:13]1[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=1>CCCCCC.CN(C)C=O>[CH2:12]([O:3][CH2:4][CH:5]1[CH2:10][CH2:9][CH2:8][CH:7]([OH:11])[CH2:6]1)[C:13]1[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=150% Sodium hydride (5.77 g; 120 mmol) is washed with n-hexane, and dimethylformamide (50 ml) is added thereto. To the resultant mixture, 3-hydroxymethylcyclohexanol (9) (10.0 g; 76.8 mmol) is dropwise added under ice-cooling, and then benzyl bromide (13.15 g; 76.8 mmol) is dropwise added thereto under ice-cooling. The resulting mixture is stirred at a temperature of 0° to 10° C. for 5 hours. The reaction mixture is poured into ice-water, extracted with toluene. The organic layer is washed with water, dried and concentrated under reduced pressure. The residue is chromatographed on a silica gel column to give 3-benzyloxymethylcyclohexanol (10) (9.55 g).
読み込み中…
