反应详情

温度

110 °C

An oven-dried resealable Schlenk tube was charged with CuI (2.0 mg, 0.0105 mmol, 1.0 mol %), diphenylamine (210 mg, 1.24 mmol), sodium tert-butoxide (145 mg, 1.51 mmol), evacuated and backfilled with argon. trans-1,2-Cyclohexanediamine (13 μL, 0.108 mmol, 11 mol %), dodecane (235 μL), 5-iodo-m-xylene (150 μL, 1.04 mmol) and dioxane (1.0 mL) were added under argon. The Schlenk tube was sealed and the reaction mixture was stirred magnetically at 110° C. for 24 h. The resulting pale brown suspension was cooled to room temperature and filtered through a 0.5×1 cm pad of silica gel eluting with 10 mL of hexane-ethyl acetate 5:1. The filtrate was concentrated and the residue was purified by flash chromatography on silica gel (2×25 cm; hexane-ethyl acetate 40:1; 15 mL fractions). Fractions 9–13 provided 211 mg (74% yield) of the product as white crystals. The 1H NMR spectrum was in accord with that reported by Goodbrand et al. Goodbrand, H. B.; Hu, N. X. J. Org. Chem. 1999, 64, 670.

1. customevacuated
2. customThe Schlenk tube was sealed
3. temperatureThe resulting pale brown suspension was cooled to room temperature
4. filtrationfiltered through a 0.5×1 cm pad of silica gel eluting with 10 mL of hexane-ethyl acetate 5:1
5. concentrationThe filtrate was concentrated
6. customthe residue was purified by flash chromatography on silica gel (2×25 cm; hexane-ethyl acetate 40:1; 15 mL fractions)