Imidazole → Methyl 4-((3-(((tert-butyldimethylsilyl)oxy)methyl)adamantan-1-yl)methoxy)-5-chloro-2-fluorobenzoate

Participants

Reaction Steps

A solution of methyl 5-chloro-2-fluoro-4-((3-(hydroxymethyl)-adamantan-1-yl)methoxy)benzoate (0.83 g, 2.17 mmol), tert-butylchlorodimethylsilane (0.36 g, 2.39 mmol), and imidazole (0.74 g, 10.90 mmol) in anhydrous dimethylformamide (12 mL) was stirred at ambient temperature under nitrogen for 16 hours. The reaction mixture was diluted with ethyl acetate (100 mL), washed with water (50 mL), saturated ammonium chloride (2×50 mL) and brine (2×50 mL); dried with anhydrous sodium sulfate, filtered and concentrated in vacuo. The residue was purified by silica gel column chromatography (8:1 hexanes:ethyl acetate) to provide the title compound (1.10 g, quant): 1H NMR (300 MHz, CDCl3) δ 7.93 (d, J=7.6 Hz, 1H), 6.62 (d, J=12.1 Hz, 1H), 3.87 (s, 3H), 3.58 (s, 2H), 3.17 (s, 2H), 2.13-2.05 (m, 2H), 1.69-1.58 (m, 6H), 1.49-1.36 (m, 6H), 0.87 (s, 9H), −0.01 (s, 6H); MS (ES+) m/z 497.1, 499.1 (M+1).

Provenance & Evidence