反应详情

A solution of methyl 5-(chloromethyl)-3-thiophenecarboxylate (1.7 g) in 50% aqueous acetone (60 ml) was treated with silver nitrate (1.52 g). After 2 h the resulting precipitate was filtered and the filtrate was evaporated. The residue was extracted with diethyl ether, and the ethereal extract was washed with water. Evaporation of the solvent gave an oily residue, which was chromatographed on silica with ethyl acetate-light petroleum 60°-80°; (1:1) to give the title compound as an oil (0.3 g) b.p. 110/0.1 mm m.p. 38°-40°.

1. filtrationAfter 2 h the resulting precipitate was filtered
2. customthe filtrate was evaporated
3. extractionThe residue was extracted with diethyl ether
4. extractionthe ethereal extract
5. washwas washed with water
6. customEvaporation of the solvent
7. customgave an oily residue, which
8. customwas chromatographed on silica with ethyl acetate-light petroleum 60°-80°