[CH:1]1([S:4]([C:6]2[CH:11]=[CH:10][C:9]([N+:12]([O-:14])=[O:13])=[CH:8][CH:7]=2)=[O:5])[CH2:3][CH2:2]1.[F:15][C:16]([F:21])([F:20])[C:17]([NH2:19])=[O:18].C(O)(=O)C.C(O)(=O)C.IC1C=CC=CC=1.[O-2].[Mg+2]>C(Cl)Cl.CC([O-])=O.CC([O-])=O.CC([O-])=O.CC([O-])=O.[Rh+2].[Rh+2]>[CH:1]1([S:4]([C:6]2[CH:11]=[CH:10][C:9]([N+:12]([O-:14])=[O:13])=[CH:8][CH:7]=2)(=[N:19][C:17](=[O:18])[C:16]([F:21])([F:20])[F:15])=[O:5])[CH2:3][CH2:2]1A suspension of (RS)-1-cyclopropanesulphinyl-4-nitrobenzene, trifluoroacetamide, iodobenzene diacetate and magnesium oxide in DCM was admixed, under argon, with rhodium(II) acetate dimer and stirred overnight at room temperature. The mixture was filtered off with suction over Celite and concentrated by evaporation. The remaining residue was purified by means of chromatography (hexane/acetic ester 2:1) (yield: 78%).
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