[NH2:1][C:2]([NH:4][C:5]([NH2:7])=[NH:6])=[NH:3].CO[C:10]1[CH2:16][CH2:15][CH2:14][CH2:13][CH2:12][N:11]=1>C(O)C>[NH2:6][C:5]1[N:4]=[C:2]([NH2:1])[N:3]=[C:12]([CH2:13][CH2:14][CH2:15][CH2:16][CH2:10][NH2:11])[N:7]=1A mixture of biguanide (1.05 g.), 4,5,6,7-tetrahydro-2-methoxy-3H-azepine (1.27 g.) and ethanol (50 ml.) was heated under reflux for 18 hours, cooled and the solid that crystallised was collected to give 2,4-diamino-6-(5-aminopentyl)-1,3,5-triazine which was used without further purification.
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