[H-].[Na+].[Br:3][C:4]1[CH:9]=[CH:8][C:7]([CH3:10])=[CH:6][C:5]=1[C:11]([OH:16])([CH2:14][F:15])[CH2:12][F:13].[CH2:17](Cl)[O:18][CH2:19][CH2:20]OC.CC(=O)OCC>C1COCC1.O>[Br:3][C:4]1[CH:9]=[CH:8][C:7]([CH3:10])=[CH:6][C:5]=1[C:11]([O:16][CH2:17][O:18][CH2:19][CH3:20])([CH2:12][F:13])[CH2:14][F:15]NaH (362 mg, 9.05 mmol) was added to a solution of 2-(2-bromo-5-methylphenyl)-1,3-difluoropropan-2-ol (2.0 g, 7.54 mmol) in THF (10 mL) slowly at 0° C. MEMCl (1.41 g, 11.32 mmol) was added dropwise. The mixture was stirred at rt overnight. The mixture was diluted with H2O and extracted with EA (50 mL×2). The combined organic layers were washed with brine, dried over Na2SO4, filtered and concentrated under reduced pressure. The residue was purified by column chromatography over silica gel eluted with PE:EA (10:1 to 6:1) to give the product (1.8 g, yield 68%) as colorless oil.
読み込み中…
