[F:1][C:2]1[CH:7]=[CH:6][C:5]([N:8]2[C:12]([C:13]3[CH:18]=[CH:17][C:16]([S:19]([CH3:22])(=[O:21])=[O:20])=[CH:15][CH:14]=3)=[CH:11][C:10]([CH2:23][OH:24])=[C:9]2[CH3:25])=[CH:4][CH:3]=1.CCOC(/N=N/C(OCC)=O)=O.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[I:57][C:58]1[CH:63]=[CH:62][C:61](O)=[CH:60][CH:59]=1>C1COCC1.O>[F:1][C:2]1[CH:3]=[CH:4][C:5]([N:8]2[C:12]([C:13]3[CH:18]=[CH:17][C:16]([S:19]([CH3:22])(=[O:20])=[O:21])=[CH:15][CH:14]=3)=[CH:11][C:10]([CH2:23][O:24][C:61]3[CH:62]=[CH:63][C:58]([I:57])=[CH:59][CH:60]=3)=[C:9]2[CH3:25])=[CH:6][CH:7]=1Compound 6 (from Example A) (1 mmol) is added to a solution of diethylazodicarboxylate (1 mmol), triphenylphosphine (1 mmol) and 4-iodophenol (1 mmol) in dry THF (25 mL). The progress of the reaction is monitored by tlc. When the reaction is complete, water is added and the crude product is extracted in ethyl acetate. The extract is dried and evaporated and the title compound 25 is purified by HPLC.
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