[C:1]1([N:7]2[CH2:12][CH2:11][N:10]([CH2:13][CH2:14][C:15]#[C:16][C:17]3[CH:24]=[CH:23][C:20]([CH:21]=O)=[CH:19][CH:18]=3)[CH2:9][CH2:8]2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.S(=O)(O)[O-].[Na+].[NH2:30][C:31]1[CH:36]=[CH:35][CH:34]=[CH:33][C:32]=1[NH2:37]>CO>[NH3:7].[C:1]1([N:7]2[CH2:12][CH2:11][N:10]([CH2:13][CH2:14][C:15]#[C:16][C:17]3[CH:24]=[CH:23][C:20]([C:21]4[NH:37][C:32]5[CH:33]=[CH:34][CH:35]=[CH:36][C:31]=5[N:30]=4)=[CH:19][CH:18]=3)[CH2:9][CH2:8]2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1A mixture of 4-[4-(4-phenylpiperazin-1-yl)but-1-ynyl]benzaldehyde (Example B) (1.28 g), sodium bisulfite (0.4 g) and 1,2-diaminobenzene (0.43 g) is stirred in methanol (50 mL) at reflux for 18 hours. The mixture is filtered and the solvent evaporated. The residue is purified by chromatography on silica gel eluting with 200:8:1 dichloromethane:ethanol:0.880 aqueous ammonia to give 0.70 g of the title compound as a tan solid; mp 247°-248° C.
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