[Cl:1][C:2]1[CH:11]=[CH:10][C:5]([CH:6]=[CH:7][CH2:8]Cl)=[CH:4][CH:3]=1.[NH2:12][C:13]1[C:18]([NH2:19])=[CH:17][CH:16]=[CH:15][N:14]=1.C(=O)([O-])[O-].[K+].[K+].O>CN(C)C=O>[NH2:12][C:13]1[C:18]([NH:19][CH2:8][CH:7]=[CH:6][C:5]2[CH:10]=[CH:11][C:2]([Cl:1])=[CH:3][CH:4]=2)=[CH:17][CH:16]=[CH:15][N:14]=17.71 g of p-chlorocinnamyl chloride and 13.5 g of 2,3-diaminopyridine were dissolved in 220 ml of dimethylformamide, and to the solution was added 8.6 g of potassium carbonate, and the mixture was stirred at a room temperature for 50 hours, and after adding 300 ml of water, extracted twice with 200 ml of chloroform. The extract was dried over magnesium sulfate and concentrated under a reduced pressure, and resulting residue was applied to a silica gel column and eluted with chloroform/methanol (100:1 to 50:1), to obtain 4.52 g of the title compound as yellow crystals.
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