[Cl:1][C:2]1[CH:3]=[C:4]2[C:9](=[CH:10][CH:11]=1)[CH:8]=[C:7]([S:12]([N:15]1[CH2:20][CH2:19][N:18]([C:21]([C:23]3[N:24]=[N:25][C:26](Cl)=[CH:27][CH:28]=3)=[O:22])[CH2:17][CH2:16]1)(=[O:14])=[O:13])[CH:6]=[CH:5]2.[CH3:30][N:31]1[CH2:37][CH2:36][CH2:35][NH:34][CH2:33][CH2:32]1.N1C=CC=CC=1>CS(C)=O.C(OCC)(=O)C>[OH2:13].[Cl:1][C:2]1[CH:3]=[C:4]2[C:9](=[CH:10][CH:11]=1)[CH:8]=[C:7]([S:12]([N:15]1[CH2:20][CH2:19][N:18]([C:21]([C:23]3[N:24]=[N:25][C:26]([N:34]4[CH2:35][CH2:36][CH2:37][N:31]([CH3:30])[CH2:32][CH2:33]4)=[CH:27][CH:28]=3)=[O:22])[CH2:17][CH2:16]1)(=[O:14])=[O:13])[CH:6]=[CH:5]2.[Cl:1][C:2]1[CH:3]=[C:4]2[C:9](=[CH:10][CH:11]=1)[CH:8]=[C:7]([S:12]([N:15]1[CH2:20][CH2:19][N:18]([C:21]([C:23]3[N:24]=[N:25][C:26]([N:34]4[CH2:35][CH2:36][CH2:37][N:31]([CH3:30])[CH2:32][CH2:33]4)=[CH:27][CH:28]=3)=[O:22])[CH2:17][CH2:16]1)(=[O:14])=[O:13])[CH:6]=[CH:5]2A mixture of 1-(6-chloronaphthalene-2-sulfonyl)-4-(6-chloropyridazin-3-ylcarbonyl)piperazine (0.2 g, 0.443 mmol), 1-methylhexahydro-1,4-diazepine (0.166 mL, 1.33 mmol) and pyridine (0.11 mL, 1.33 mmol) in DMSO (5 mL) was heated in a sealed tube at 80° C. overnight. The reaction mixture was cooled to room temperature, diluted with ethyl acetate (500 mL), washed with saturated sodium bicarbonate (200 mL), water (2×150 mL) and brine, and dried over sodium sulfate. After filtration and evaporation of the solvent, the residue was purified by flash chromatography over silica, eluting with 5–7% methanol/methylene chloride, to afford the title compound (0.1 g, 43%).
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