[Br:1][C:2]1[CH:7]=[C:6]([CH3:8])[CH:5]=[CH:4][C:3]=1[C:9]([OH:14])([CH2:12][F:13])[CH2:10][F:11].CCN(C(C)C)C(C)C.[CH2:24](Cl)[O:25][CH3:26].[NH4+].[Cl-]>C(Cl)Cl>[Br:1][C:2]1[CH:7]=[C:6]([CH3:8])[CH:5]=[CH:4][C:3]=1[C:9]([O:14][CH2:24][O:25][CH3:26])([CH2:10][F:11])[CH2:12][F:13]To a stirring solution of 2-(2-bromo-4-methylphenyl)-1,3-difluoropropan-2-ol (1.3 g, 4.9 mmol) in DCM (10 mL) at rt were successively added DIPEA (3.4 mL, 19.6 mol) and MOMCl (0.6 mL, 7.4 mmol) over a 10 min period. The solution was stirred 11 h at rt followed by addition of a saturated aqueous NH4Cl solution (20 mL). The aqueous phase was segregated, and the organic one was washed with water (20 mL), brine (20 mL), dried with anhydrous Na2SO4, filtered, and concentrated to give pure 2-bromo-1-(1,3-difluoro-2-(methoxymethoxy)propan-2-yl)-4-methylbenzene (1.2 g, yield 80%) 1H NMR (400 MHz, CDCl3): δ 7.50 (s, 1 H), 7.38 (d, 1 H), 7.15 (d, 1 H), 5.15-5.12 (m, 1 H), 5.03-5.00 (m, 2 H), 4.91-4.88 (m, 1 H), 4.62 (s, 2 H), 3.43 (s, 3 H), 2.32 (s, 3 H) ppm.
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