反应详情

Following the procedure of Example 13, o-fluorothiophenol (4.02 g., 31.4 mmoles) was reacted with 5-bromofuran-3-carboxylic acid. Isolation according to the procedure of Example 16 gave crude product as an oil. The product was chromatographed on silica gel with ethyl acetate-1/hexane-5/5% acetic acid as eluant. Combination of clean middle cuts, evaporation to dryness and recrystallization from methanol/water gave purified 5-(2-fluorophenylthio)furan-3-carboxylic acid (266 mg., m.p. 100°-103° C., m/e 238).

1. customgave crude product as an oil
2. customThe product was chromatographed on silica gel with ethyl acetate-1/hexane-5/5% acetic acid as eluant
3. customCombination of clean middle cuts, evaporation
4. customto dryness and recrystallization from methanol/water
5. customgave
6. custompurified 5-(2-fluorophenylthio)furan-3-carboxylic acid (266 mg., m.p. 100°-103° C., m/e 238)