[NH2:1][C:2]1[CH:6]=[C:5]([CH3:7])[NH:4][N:3]=1.[ClH:8].[C:9](=[NH:15])(OCC)[CH2:10][CH3:11]>C(#N)C>[ClH:8].[CH3:7][C:5]1[NH:4][N:3]=[C:2]([NH:1][C:9](=[NH:15])[CH2:10][CH3:11])[CH:6]=1A 13.8 g portion of 3-amino-5-methyl-1H-pyrazole was dissolved in 52 ml of acetonitrile, and 22.0 g of ethyl propionimidate hydrochloride was added to the above solution with cooling on an ice bath. The resulting mixture was stirred for 1 hour at the same temperature and then overnight at room temperature.
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