Phenylacetylene → 1-Fluoro-5-methoxy-2-nitro-4-(2-phenylethynyl)benzene

Participants

Reaction Steps

A mixture of 2-bromo-5-fluoro-4-nitroanisole (0.46 g), phenylacetylene (67 mg), tetrakis(triphenylphosphine) -palladium(0) (38 mg) and copper (I) iodide (13 mg) in N,N-diisopropylamine (5 mL) was stirred at room temperature overnight. The reaction mixture was diluted with ethyl acetate. The insoluble material was removed by filtration, and the filtrate was concentrated under reduced pressure. The residue was purified by column chromatography on silica gel (eluent: n-hexane/ethyl acetate=10/1−5/1) to give 5-fluoro-4-nitro-2-phenylethynylanisole (0.18 g). This material was dissolved in ethyl acetate (5 mL). To the solution was added 10% palladium-carbon powder (0.45 g), and the mixture was stirred at room temperature under a hydrogen atmosphere for 3 hours. The insoluble material was removed by filtration, and the filtrate was concentrated under reduced pressure. The residue was purified by column chromatography on silica gel (eluent: n-hexane/ethyl acetate=10/1−4/1) to give the title compound (87 mg).

Provenance & Evidence