反应详情

温度

90 °C

A mixture of tert-butyl 1-(4-bromophenyl)cyclobutylcarbamate (1.53 g, 4.7 mmol), ethynylbenzene (2.5 mL, 22.6 mmol), copper iodide (36 mg, 0.24 mmol) and diisopropylamine (3.2 mL, 22.6 mmol) in dioxane (3 mL) was degassed for 30 min, followed by the addition of bis(tri-tert-butylphosphine)palladium (144 mg, 0.36 mmol). The resulting mixture was heated at 90° C. for 16 h, after cooled down to RT, concentrated to dryness. The crude residue was purified by column chromatography (eluting with 10% DCM in heptane) to give the title compound (0.85 g, 52%). 1H NMR (500 MHz, CDCl3): 7.58-7.54 (m, 4H), 7.48-7.43 (m, 2H), 7.39-7.20 (m, 3H), 2.55-2.40 (m, 4H), 2.15-2.10 (m, 1H), 1.93-1.84 (m, 1H), 1.45-1.20 (br s, 9H).

1. customwas degassed for 30 min
2. temperatureafter cooled down to RT
3. concentrationconcentrated to dryness
4. customThe crude residue was purified by column chromatography (eluting with 10% DCM in heptane)