[Cl:1][C:2]1[CH:3]=[C:4]([NH:21][C:22](=[O:27])[CH2:23][C:24](=O)[CH3:25])[CH:5]=[CH:6][C:7]=1[N:8]([CH2:15][CH2:16][CH2:17][CH2:18][CH2:19][CH3:20])[CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][CH3:14].[NH3:28]>CO>[NH2:28]/[C:24](/[CH3:25])=[CH:23]\[C:22]([NH:21][C:4]1[CH:5]=[CH:6][C:7]([N:8]([CH2:15][CH2:16][CH2:17][CH2:18][CH2:19][CH3:20])[CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][CH3:14])=[C:2]([Cl:1])[CH:3]=1)=[O:27]A mixture of N-(3-chloro-4-(dihexylamino)phenyl)-3-oxobutanamide (3.94 g, 10 mmol), MeOH (50 mL) and ammonia (50 mL) was stirred at rt overnight. The mixture was then concentrated in vacuo to give the title compound as black oil (3.94 g, 100%).
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