四氢呋喃 → 1-Chloro-2-(trifluoromethyl)-4-(4-vinylphenoxy)benzene

To a solution of methyltriphenylphosphonium bromide (5.99 g, 16.76 mmol) and NaH (1.397 g, 34.9 mmol) in THF (50 mL) was added a solution of 4-{[4-chloro-3-(trifluoromethyl)phenyl]oxy}benzaldehyde (4.2 g, 13.97 mmol) in THF (50 mL) under nitrogen at 0° C. The reaction mixture was stirred at 0° C. for 0.5 h, then at room temperature overnight. Purification via flash chromatography then afforded the title compound (3.6 g, 12.05 mmol, 86% yield).