Gamma-Butyrolactone → Butanoic acid, 4-(phenylthio)-

Reaktionsgleichung

C[O-].[Na+].[C:4]1([SH:10])[CH:9]=[CH:8][CH:7]=[CH:6][CH:5]=1.[C:11]1(=[O:16])[O:15][CH2:14][CH2:13][CH2:12]1>C(O)C>[C:4]1([S:10][CH2:14][CH2:13][CH2:12][C:11]([OH:16])=[O:15])[CH:9]=[CH:8][CH:7]=[CH:6][CH:5]=1

Komponenten

Versuchsvorschrift

Sodium methoxide (1.2 equivalent) was added to 60 ml of ethanol, in one portion, and the suspension was stirred at room temperature. Thiophenol (1 equivalent) was added to the above suspension and stirred at room temperature for an additional 30 minutes. Butyrolactone (1.1 equivalent) was then added and the resulting mixture was stirred at reflux temperature for 6 hours, cooled to room temperature and concentrated in vacuo. The residual solid was washed with 200 ml hexane/ether 2:1, v/v. The solid was suspended in ice cold 2N HCl and stirred for 15 minutes. The solid was then filtered, washed with 100 ml hexane/ether and dried under reduced pressure at room temperature to give 4-(phenylsulfanyl)butanoic acid as a tan solid: 52% yield; 1H NMR (CDCl3) δ 7.32-7.12 (m, 5H), 2.94 (t, 2H, J=7.2 Hz), 2.41 (t, 2H, J=7.2 Hz), 1.85 (p, 2H, J=7.2 Hz); Anal. Calc. For C10H12S1O2: C, 61.22; H, 6.12. Found: C, 61.16; H, 6.28.