[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([NH:8][C:9]([NH:11][CH2:12][CH:13]2[O:18][CH2:17][CH2:16][NH:15][CH2:14]2)=[O:10])=[CH:4][CH:3]=1.[Cl:19][C:20]1[CH:21]=[C:22]([CH:26]=[CH:27][C:28]=1[Cl:29])[C:23](Cl)=[O:24]>CN(C)C=O>[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([NH:8][C:9]([NH:11][CH2:12][CH:13]2[O:18][CH2:17][CH2:16][N:15]([C:23](=[O:24])[C:22]3[CH:26]=[CH:27][C:28]([Cl:29])=[C:20]([Cl:19])[CH:21]=3)[CH2:14]2)=[O:10])=[CH:4][CH:3]=1To a stirred solution of Intermediate 9 (0.05 g) was added a solution of 3,4-dichlorobenzoyl chloride (42.7 mg) in N,N-dimethylformamide (7 ml). The mixture was stirred at 22° C. for 15 h before the solvent was evaporated in vacuo. The residue was purified by eluting through a 1 g silica solid phase extraction cartridge (Varian Bondelut), eluting sequentially with dichloromethane, ether, ethyl acetate, acetone, acetonitrile and methanol, to give the title compound as a white solid (0.080 g). LC/MS (System A) Rt 3.10 min, Mass Spectrum m/z 442 [MH+].
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