反应详情

To a solution of 1-(5-chloro-4-nitro-2-thienyl)ethanone (113 mg, 0.55 mmol) in toluene (2 mL), was added 3,5-dichloropyridine-4-thiol sodium salt (100 mg, 0.55 mmol) and potassium carbonate (113 mg, 0.825 mmol). The resulting reaction mixture was stirred at ambient temperature for 18 hours. After this time, the reaction mixture was filtered to remove the solid residues. The organic solution was diluted with ethyl acetate (15 mL) and was washed with water (2 mL×2) and brine (1 mL×2), dried (Na2SO4) and concentrated under vacuum. The residue was purified by silica gel chromatography using a mixture of 96:4 hexane and ethyl acetate as eluent to afford the title product as a solid (22 mg, 12% yield). 1H NMR (400 MHz, MeOD) δ: 8.85 (2H, m) 8.36 (1H, s), 2.52 (3H, s). MS m/z: 348.8 [M+H]+.

1. customThe resulting reaction mixture
2. filtrationAfter this time, the reaction mixture was filtered
3. customto remove the solid residues
4. additionThe organic solution was diluted with ethyl acetate (15 mL)
5. washwas washed with water (2 mL×2) and brine (1 mL×2)
6. dry with materialdried (Na2SO4)
7. concentrationconcentrated under vacuum
8. customThe residue was purified by silica gel chromatography
9. additiona mixture of 96:4 hexane and ethyl acetate as eluent