[F:1][C:2]([F:29])([F:28])[C@H:3]1[CH2:8][CH2:7][C@H:6]([NH:9][C:10](=[O:27])[C:11]2[CH:16]=[C:15]([N+:17]([O-])=O)[C:14]([NH:20][CH3:21])=[CH:13][C:12]=2[N:22]([CH3:26])[CH2:23][C:24]#[CH:25])[CH2:5][CH2:4]1.[O-]S(S([O-])=O)=O.[Na+].[Na+].O.CCO>C([O-])(O)=O.[Na+]>[F:1][C:2]([F:28])([F:29])[C@H:3]1[CH2:8][CH2:7][C@H:6]([NH:9][C:10](=[O:27])[C:11]2[CH:16]=[C:15]([NH2:17])[C:14]([NH:20][CH3:21])=[CH:13][C:12]=2[N:22]([CH3:26])[CH2:23][C:24]#[CH:25])[CH2:5][CH2:4]1A mixture of N-(trans-4-trifluoromethyl-cyclohexyl)-2-[N-methyl-N-propargylamino]-4-methylamino-5-nitro-benzoic acid amide (60 mg, 0.145 mmol), Na2S2O4 (127 mg and a second 150 mg portion is added after 8 h), 1 mL water and 5 mL EtOH is stirred at 55° C. for 24 h. The mixture is diluted with sat aq NaHCO3 and extracted with EtOAc. The combined organic phases are dried with Na2SO4, filtered and concentrated.
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