反应详情

温度

50 °C

To a mixture of 4-chloro-5-isopropylpyrrolo[2,1-f][1,2,4]triazine (0.038 g, 0.194 mmol, 1.0 equiv) and 2-fluoro-4-nitrophenol (0.062 g, 0.388 mmol, 2.0 equiv) in anhydrous CH3CN (2mL), stirred for five minutes under a nitrogen atmosphere then was added DABCO (0.044 g, 0.388 mmol, 2.0 equiv) and the reaction mixture was heated at 50° C. for 2 h. The mixture was cooled to room temperature and quenched with 1 N HCl. The solution was extracted with CH2Cl2 (3×30 ml), the combined organic extracts dried over anhydrous magnesium sulfate, filtered and concentrated in vacuo. The residue was purified by silica gel (Merck KGaA, 230-400 mesh particle size) flash chromatography, eluting with 2/1 hexane/ethyl acetate, afforded the title compound (0.048 g, 79%). 1H NMR (CDCl3) δ 8.07-8.13 (m, 2H), 7.77 (s, 1H), 7.68-7.69 (m, 1H), 7.46-7.50 (m, 1H), 6.71-6.72 (m, 1H), 3.53-3.56 (m, 1H), 1.29-1.31 (m, 6H); HRMS(ESI), calc, 317.1050 (M+H)+ found, 317.1039.

1. temperatureThe mixture was cooled to room temperature
2. customquenched with 1 N HCl
3. extractionThe solution was extracted with CH2Cl2 (3×30 ml)
4. dry with materialthe combined organic extracts dried over anhydrous magnesium sulfate
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. customThe residue was purified by silica gel (Merck KGaA, 230-400 mesh particle size) flash chromatography
8. washeluting with 2/1 hexane/ethyl acetate