反应详情

温度

80 °C

After suspending 6,7-dimethoxy-4-(5-nitrothiazol-2-ylsulfanyl)quinoline (699 mg, 2.00 mmol), iron (559 mg, 10.0 mmol) and ammonium chloride (1.07 g, 20.0 mmol) in an ethanol (20 ml)—water (5 ml) mixed solvent, the suspension was heated and stirred at 80° C. for 20 minutes. After completion of the reaction, the reaction mixture was filtered with celite and washed in an ethyl acetate-tetrahydrofuran mixed solvent. The organic layer 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=30:1), and the fraction containing the target substance was concentrated to obtain the title compound (190 mg, 0.595 mmol, 30%) 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 an ethyl acetate-tetrahydrofuran mixed solvent
6. washThe organic layer was washed with water and saturated brine
7. dry with materialdried over anhydrous magnesium sulfate
8. filtrationthe drying agent was filtered off
9. distillationthe filtrate was distilled off under reduced pressure
10. customThe obtained crude product
11. additionthe fraction containing the target substance
12. concentrationwas concentrated