反应详情

温度

50 °C

4,5-Bis-(4-chlorophenyl)-2-(2-ethoxy-4-iodophenyl)-4,5-dihydro-1H-imidazole (566 mg, 1.05 mmol, example 27), copper(I) iodide (9.5 mg, 0.11 mmol), dichlorobis(triphenylphosphine)-palladium(II) (148 mg, 0.211 mmol) and 3,3-dimethyl-1-butyne (0.182 mL, 1.48 mmol) were dissolved under nitrogen in a flame-dried Schlenk tube in a mixture of triethylamine (1.7 mL) and dimethylformamide (1.7 mL). The reaction mixture was warmed in a 50° C. oil bath for 20 h, allowed to cool to room temperature and then partitioned between 2% sodium carbonate solution (70 mL) and diethyl ether (2×100 mL). The combined organic phases were washed with water (2×50 mL) and brine (50 mL), then dried over sodium sulfate and evaporated. The residue was purified by flash column chromatography (silica gel, eluting with 1% methanol in methylene chloride) to give 4,5-bis-(4-chlorophenyl)-2-[4-(3,3-dimethylbut-1-ynyl)-2-ethoxyphenyl]-4,5-dihydro-1H-imidazole as an off-white foam (0.432 g, 83%). LC-MS: 491.3 [(M+H)+].

1. temperatureto cool to room temperature
2. custompartitioned between 2% sodium carbonate solution (70 mL) and diethyl ether (2×100 mL)
3. washThe combined organic phases were washed with water (2×50 mL) and brine (50 mL)
4. dry with materialdried over sodium sulfate
5. customevaporated
6. customThe residue was purified by flash column chromatography (silica gel, eluting with 1% methanol in methylene chloride)