[CH3:1][O:2][C:3]([C:5]1[N:6]([C:10]2[CH:15]=[CH:14][C:13]([N+:16]([O-])=O)=[C:12]([NH:19][C:20](=[O:32])[CH2:21][C:22]([C:24]3[CH:29]=[CH:28][CH:27]=[C:26]([C:30]#[N:31])[CH:25]=3)=O)[CH:11]=2)[CH:7]=[CH:8][CH:9]=1)=[O:4]>C1COCC1.O.[Fe].CC(O)=O>[CH3:1][O:2][C:3]([C:5]1[N:6]([C:10]2[CH:15]=[CH:14][C:13]3[N:16]=[C:22]([C:24]4[CH:29]=[CH:28][CH:27]=[C:26]([C:30]#[N:31])[CH:25]=4)[CH2:21][C:20](=[O:32])[NH:19][C:12]=3[CH:11]=2)[CH:7]=[CH:8][CH:9]=1)=[O:4]The title compound was prepared from 1-{3-[3-(3-cyano-phenyl)-3-oxo-propionylamino]-4-nitro-phenyl}-1H-pyrrole-2-carboxylic acid methyl ester (Example M15) by reductive cyclization with Fe/HOAc in THF/H2O at 80° C. according to the general procedure J (method d). Obtained as a brown solid (323 mg).
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