[CH3:1][N:2]([CH3:10])[CH:3]1[CH2:8][CH2:7][C:6](=O)[CH2:5][CH2:4]1.Cl.[Br:12][C:13]1[CH:18]=[CH:17][C:16]([NH:19][NH2:20])=[CH:15][CH:14]=1.N1C=CC=CC=1.C(=O)([O-])[O-].[K+].[K+]>C(O)C>[Br:12][C:13]1[CH:18]=[CH:17][C:16]([NH:19][N:20]=[C:6]2[CH2:7][CH2:8][CH:3]([N:2]([CH3:10])[CH3:1])[CH2:4][CH2:5]2)=[CH:15][CH:14]=1To a mixture of 6.0 gm (42.0 mMol) 4-dimethylaminocyclohexanone and 9.5 gm (42.0 mMol) 4-bromophenylhydrazine hydrochloride in 100 mL ethanol were added 3.4 mL (42 mMol) pyridine. The resultant mixture was then heated at reflux for 2 hours and then stirred at ambient temperature for 18 hours. The reaction mixture was then treated with aqueous potassium carbonate and extracted well with dichloromethane. The organic phases were combined, dried over sodium sulfate and concentrated under reduced pressure. The resultant residue was treated with toluene and concentrated again under reduced pressure to give 11.3 gm (87%) of the desired compound.
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