反应详情

温度

80 °C

After suspending 7-methoxy-4-(5-nitrothiophen-2-ylsulfanyl)quinoline-6-carboxamide (320 mg, 0.885 mmol), iron (247 mg, 4.43 mmol) and ammonium chloride (481 mg, 8.85 mmol) in an ethanol (8 ml)—water (2 ml)—dimethylformamide (1 ml) mixed solvent, the suspension was heated and stirred at 80° C. for 15 minutes. After completion of the reaction, the reaction mixture was filtered with celite and washed in a tetrahydrofuran-methanol mixed solvent. After adding ethyl acetate to the organic layer, it was washed with water and saturated brine and dried over anhydrous magnesium sulfate, the drying agent was filtered off and the filtrate was distilled off under reduced pressure. The obtained crude product was subjected to silica gel column chromatography (eluent—ethyl acetate:methanol=20:1), and the fraction containing the target substance was concentrated to obtain the title compound (164 mg, 0.495, mmol, 56%) as yellowish-brown crystals.

1. additionmixed solvent
2. temperaturethe suspension was heated
3. customAfter completion of the reaction
4. filtrationthe reaction mixture was filtered with celite
5. washwashed in a tetrahydrofuran-methanol mixed solvent
6. additionAfter adding ethyl acetate to the organic layer, it
7. washwas washed with water and saturated brine
8. dry with materialdried over anhydrous magnesium sulfate
9. filtrationthe drying agent was filtered off
10. distillationthe filtrate was distilled off under reduced pressure
11. customThe obtained crude product
12. additionthe fraction containing the target substance
13. concentrationwas concentrated