反应详情

4,4,4-Trifluoro-1-(3-methyl-4-methoxylphenyl)-1,3-butanedione (0.78 g, 3 mmol) and 2-hydrazino-5-(methylsulfonyl)pyridine hydrochloride (0.671 g, 3 mmol) were mixed in ethanol (60 ml), and the resulting reaction mixture was heated at reflux temperature for 72 hours. The reaction mixture was then cooled to room temperature, and the solvent was removed in vacuo. The residue was dissolved in EtOAc (250 ml), and the organic layer was washed with saturated NaHCO3 solution, brine, dried (MgSO4), and concentrated in vacuo. The residue was purified first by flash chromatography using 40% hexane in methylene chloride to and then by recrystallization from 3:1 of isooctane:methylene chloride to give the title compound (535 mg, 43%).

1. customthe resulting reaction mixture
2. temperaturewas heated
3. temperatureat reflux temperature for 72 hours
4. customthe solvent was removed in vacuo
5. dissolutionThe residue was dissolved in EtOAc (250 ml)
6. washthe organic layer was washed with saturated NaHCO3 solution, brine
7. dry with materialdried (MgSO4)
8. concentrationconcentrated in vacuo
9. customThe residue was purified first by flash chromatography
10. customby recrystallization from 3:1 of isooctane