[C:1]([S:4][C:5]([CH3:38])([CH3:37])[CH:6]([NH2:36])[C:7]([O:9][C@H:10]([C:21]1[CH:26]=[CH:25][C:24]([O:27][CH:28]([F:30])[F:29])=[C:23]([O:31][CH2:32][CH:33]2[CH2:35][CH2:34]2)[CH:22]=1)[CH2:11][C:12]1[C:17]([Cl:18])=[CH:16][N+:15]([O-:19])=[CH:14][C:13]=1[Cl:20])=[O:8])(=[O:3])[CH3:2].[C:39]1([S:45](Cl)(=[O:47])=[O:46])[CH:44]=[CH:43][CH:42]=[CH:41][CH:40]=1>N1C=CC=CC=1>[C:1]([S:4][C:5]([CH3:38])([CH3:37])[CH:6]([NH:36][S:45]([C:39]1[CH:44]=[CH:43][CH:42]=[CH:41][CH:40]=1)(=[O:47])=[O:46])[C:7]([O:9][C@H:10]([C:21]1[CH:26]=[CH:25][C:24]([O:27][CH:28]([F:30])[F:29])=[C:23]([O:31][CH2:32][CH:33]2[CH2:35][CH2:34]2)[CH:22]=1)[CH2:11][C:12]1[C:13]([Cl:20])=[CH:14][N+:15]([O-:19])=[CH:16][C:17]=1[Cl:18])=[O:8])(=[O:3])[CH3:2]4-((2S)-2-(3-(acetylthio)-2-amino-3-methylbutanoyloxy)-2-(3-(cyclopropylmethoxy)-4-(difluoromethoxy)phenyl)ethyl)-3,5-dichloropyridine 1-oxide (101 mg, 0.170 mmol) was dissolved in pyridine (1 ml), then benzenesulfonyl chloride (60 mg, 0.340 mmol) was added at 0° C., and the mixture was stirred at RT for 2 hours. The reaction was quenched with HCl 1N, and the product was extracted with EtOAc. The organic phase was washed with HCl 1N (2×) and brine, then dried over Na2SO4. The solvent was removed and the crude product was purified by preparative reverse-phase HPLC to give 10 mg of the desired compound (Yield 8%).
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