反应详情

Stir a mixture of 2-bromo-5-nitroaniline 16 (2.81 g, 12.95 mmol), dichlorobis(triphenylphospine) palladium (II) (0.45 g, 0.65 mmol), and copper (I) iodide (0.12 g, 0.65 mmol) in anhydrous acetonitrile (10 mL) under inert atmosphere. Saturate the mixture with propyne gas, then add triethyl amine (3.6 mL, 25.90 mmol), seal the vessel, and stir at ambient temperature 14 hours. Concentrate the mixture in vacuo, suspend in 100 mL diethylether, add celite, and filter. Concentrate the filtrate in vacuo and chromatograph the residue over silica gel, eluting with hexanes/ethyl acetate (9:1 v/v) to afford the title compound, 1.75 g (76%). LRMS (API ES+)=177.0 (M+H).

1. concentrationSaturate the mixture with propyne gas
2. stirringstir at ambient temperature 14 hours
3. concentrationConcentrate the mixture in vacuo
4. additionadd celite
5. filtrationfilter
6. concentrationConcentrate the filtrate in vacuo and chromatograph the residue over silica gel
7. washeluting with hexanes/ethyl acetate (9:1 v/v)