反应详情

A mixture of 1-(benzyloxy)-4-iodo-2-methylbenzene (850 mg, 2.6 mmol), 4-(trifluoromethyl)-1H-pyrazole (535 mg, 3.9 mmol), copper iodide (100 mg, 0.52 mmol), dimethylglycine (54 mg, 0.52 mmol), potassium carbonate (906 mg, 6.6 mmol), and DMSO (10 ml) was stirred at +120° for 20 hours. The reaction was cooled to the ambient temperature, diluted with 10 ml of 5% aqueous ammonia and 10 ml of ethyl acetate and vigorously stirred for 20 min. The mixture was extracted with ethyl acetate (2×20 ml). The combined organic extract was washed with brine, dried over anhydrous magnesium sulfate, and loaded on silica gel. Chromatography on a silica gel column, eluting with a gradient from 5% to 30% of ethyl acetate in heptane gave the target product as an oil, which crystallized upon standing to a colorless solid (670 mg, 77%). MS (M+1): 333.1.

1. stirringvigorously stirred for 20 min
2. extractionThe mixture was extracted with ethyl acetate (2×20 ml)
3. extractionThe combined organic extract
4. washwas washed with brine
5. dry with materialdried over anhydrous magnesium sulfate
6. washChromatography on a silica gel column, eluting with a gradient from 5% to 30% of ethyl acetate in heptane