2-Fluorothiophenol → 5-(2-Fluorophenylthio)furan-3-carboxylic Acid
Reaction equation
[F:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[SH:8].Br[C:10]1[O:14][CH:13]=[C:12]([C:15]([OH:17])=[O:16])[CH:11]=1>>[F:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[S:8][C:10]1[O:14][CH:13]=[C:12]([C:15]([OH:17])=[O:16])[CH:11]=1Participants
3
Procedure
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).
Workup
- customgave crude product as an oil
- customThe product was chromatographed on silica gel with ethyl acetate-1/hexane-5/5% acetic acid as eluant
- customCombination of clean middle cuts, evaporation