[F:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[C:8]1[CH:13]=[CH:12][C:11]([CH:14](O)[CH3:15])=[CH:10][CH:9]=1.FC1C=CC=CC=1C1C=CC(CC(CC2C=CC(C3C=CC=CC=3F)=CC=2)=O)=CC=1.[BH4-].[Na+].[SH:49][CH2:50][C:51]([OH:53])=[O:52].C1(C)C=CC(S(O)(=O)=O)=CC=1>CO.C1C=CC=CC=1>[F:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[C:8]1[CH:13]=[CH:12][C:11]([CH:14]([S:49][CH2:50][C:51]([OH:53])=[O:52])[CH3:15])=[CH:10][CH:9]=1
50 gm (0.23 mol) of 1-(2'-fluoro-4-biphenylyl)-1-hydroxy-ethane, m.p. 88° C., (prepared from 2'-fluoro-4-biphenylyl-methyl-ketone by reduction with sodium borohydride in methanol) were dissolved in 500 ml of benzene, 32.2 gm (0.276 mol) of 80% mercapto-acetic acid and 1 gm of p-toluenesulfonic acid were added, and the mixture was heated at its boiling point for 1 hour, using an apparatus equipped with a water trap. 20.5 ml of water were separated. The benzene solution was washed with water after cooling, dried and evaporated. The crystalline residue was recrystallized from benzene/cyclohexane (2:1), whereby 38.0 gm (61.5% of theory) of the title compound, m.p. 125°-127° C., were obtained.
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