[Cl:1][C:2]1[CH:3]=[C:4]([S:9][C:10]2[N:14]([CH:15]([CH3:17])[CH3:16])[N:13]=[C:12]([CH3:18])[C:11]=2[C:19]([C:21]2[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=2)=[O:20])[CH:5]=[C:6]([Cl:8])[CH:7]=1.[BH4-].[Na+].O>CO>[Cl:8][C:6]1[CH:5]=[C:4]([S:9][C:10]2[N:14]([CH:15]([CH3:17])[CH3:16])[N:13]=[C:12]([CH3:18])[C:11]=2[CH:19]([C:21]2[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=2)[OH:20])[CH:3]=[C:2]([Cl:1])[CH:7]=1A solution containing 32 mg of [5-(3,5-dichlorophenylthio)-1-isopropyl-3-methyl-1H-pyrazol-4-yl]-phenyl-methanone in 2 ml of methanol was treated with 6 mg of sodium borohydride at rt under nitrogen. The mixture was then stirred at rt overnight. To the mixture was added 2 ml of water and then extracted with diethyl ether three times. Combined extracts were washed with brine then dried over anhydrous magnesium sulphate, filtered and evaporated to give 30 mg of [5-(3,5-dichlorophenylthio)-1-isopropyl-3-methyl-1H-pyrazol-4-yl]-phenyl-methanol as a white solid which was used without further purification. Mass spectrum (ES) m/z 407[M+H]+.
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