Hydrochloric Acid → 2-Fluoro-5-[2-(trimethylsilyl)ethynyl]benzenebutanenitrile

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of 4-(5-Bromo-2-fluoro-phenyl)-butyronitrile (0.37 g, 1.52 mmol) in diethyl amine (6 mL) and DMF (2 mL) was added triphenylphosine (0.08 g, 0.31 mmol), trimethylsilylacetylene (0.23 ml, 1.7 mmol), CuI (0.015 g, 0.076 mmol), and dichlorbis(triphenylphospine)palladium (0.054 g, 0.076 mmol). The reaction was heated at 85° C. for 12 h and then cooled to room temperature. The reaction was diluted with ethyl acetate (20 mL) and then poured into 0.1 N HCl (20 mL) and extracted with ethyl acetate (3×50 ml). The extracts were washed with water (10 mL) and brine (10 mL), dried (MgSO4) and concentrated in vacuo. Purification by flash chromatography (5% to 10% ethyl acetate/petroleum ether) gave the title compound as a clear oil (0.28 g, 70%), identified by NMR and mass spectral analyses; MS (ES+): 260 (M+H).

Provenance & Evidence