反应详情

86 mg (0.624 mmol) of potassium carbonate are added to a solution of 110 mg (0.624 mmol) of 5-hydroxy-3-isopropyl-1H-indazole in 5 ml of DMSO and the mixture is stirred for 1 h. After addition of 106 mg (0.624 mmol) of 4-fluoro-3,5-dimethylnitrobenzene in portions, the mixture is then firstly stirred at room temperature for 2 h, then at 100° C. for 3 h. After cooling to room temperature, the mixture is added to 10 ml of water and the aqueous phase is extracted 3× with ethyl acetate. The combined organic extracts are washed with water and satd NaCl soln, dried over sodium sulphate and concentrated in vacuo. By purification of the resulting residue on silica gel (cyclohexane/ethyl acetate 3:1), 84 mg (41%) of 5-(2,6-dimethyl-4-nitrophenoxy)-3-isopropyl-1H-indazole are obtained.

1. stirringthe mixture is then firstly stirred at room temperature for 2 h
2. waitat 100° C. for 3 h
3. extractionthe aqueous phase is extracted 3× with ethyl acetate
4. washThe combined organic extracts are washed with water
5. dry with materialdried over sodium sulphate
6. concentrationconcentrated in vacuo
7. customBy purification of the resulting residue on silica gel (cyclohexane/ethyl acetate 3:1), 84 mg (41%) of 5-(2,6-dimethyl-4-nitrophenoxy)-3-isopropyl-1H-indazole
8. customare obtained