[OH:1][C@H:2]([C@H:4]([N:15]1[CH:19]=[C:18]([C:20]([NH2:22])=[O:21])[N:17]=[CH:16]1)[CH2:5][CH2:6][C:7]1[CH:12]=[CH:11][CH:10]=[CH:9][C:8]=1[S:13][CH3:14])[CH3:3].ClC1C=CC=C(C(OO)=[O:31])C=1>ClCCl>[OH:1][C@H:2]([C@H:4]([N:15]1[CH:19]=[C:18]([C:20]([NH2:22])=[O:21])[N:17]=[CH:16]1)[CH2:5][CH2:6][C:7]1[CH:12]=[CH:11][CH:10]=[CH:9][C:8]=1[S:13]([CH3:14])=[O:31])[CH3:3]A mixture of 1-[(2S,3R)-2-hydroxy-5-(2-(methylthio)phenyl)-3-pentyl]imidazole-4-carboxamide (7.1 mg) and m-chloroperbenzoic acid (75%; 5.12 mg) in dichloromethane (1 ml) was stirred at 5° C. for 2 hours. The mixture was purified by column chromatography on silica gel, eluting with a mixture of dichloromethane and methanol (5:1) to give a colorless oil of 1-[(2S,3R)-2-hydroxy-5-(2-(methylsulfinyl)phenyl)-3-pentyl]imidazole-4-carboxamide (3) (5.4 mg).
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