反应详情

To a solution of [2-chloro-6-(trifluoromethyl)pyridin-4-yl]methanol (142 mg, 0.671 mmol) in methylene chloride (1.0 mL) at 0° C. was added 1H-imidazole (55 mg, 0.80 mmol) followed by tert-butylchlorodiphenylsilane (190 μL, 0.74 mmol) and 4-dimethylaminopyridine (4 mg, 0.03 mmol). The reaction was stirred with warming to room temperature for 64 hours. The reaction mixture was diluted with diethyl ether and was washed with water followed by brine, dried over sodium sulfate, decanted and concentrated. Flash chromatography on silica gel, eluting with a gradient from 0-4% EtOAc in hexanes afforded product as a white solid (0.20 g, 66%). 1H NMR (300 MHz, CDCl3) δ 7.70-7.58 (m, 4H), 7.55-7.34 (m, 8H), 4.77 (s, 2H), 1.12 (s, 9H); 19F NMR (282 MHz, CDCl3) δ −68.49 (s); LCMS (M+H)+: 450.1.

1. washwas washed with water
2. dry with materialdried over sodium sulfate
3. customdecanted
4. concentrationconcentrated
5. washFlash chromatography on silica gel, eluting with a gradient from 0-4% EtOAc in hexanes afforded product as a white solid (0.20 g, 66%)