反应详情

温度

70 °C

3.6 g of iron powder, 1.4 g of FeSO4.7H2O, 25 ml of methanol and 8 ml of water were successively introduced into a three-necked flask. 940 mg (5 mmol) of methyl 5-nitro-2-thiophenecarboxylate were then added and the mixture was heated at 70° C. for eight hours. The reaction medium was filtered on celite, the filtrate evaporated, and taken up in water and ethyl ether. The organic phase was decanted, dried over magnesium sulfate and evaporated. The residue obtained was purified by chromatography on a silica column eluted with dichloromethane; 2 g (77%) of the expected compound of melting point 110°-112° C. were obtained.

1. filtrationThe reaction medium was filtered on celite
2. customthe filtrate evaporated
3. customThe organic phase was decanted
4. dry with materialdried over magnesium sulfate
5. customevaporated
6. customThe residue obtained
7. customwas purified by chromatography on a silica column
8. washeluted with dichloromethane