C([NH:9][CH:10]([CH2:14][CH2:15][CH2:16][CH2:17][NH:18]C(=O)C1C=CC=CC=1)[C:11](=[O:13])[CH3:12])(=O)C1C=CC=CC=1.[ClH:27]>CC#N>[ClH:27].[ClH:27].[NH2:9][CH:10]([CH2:14][CH2:15][CH2:16][CH2:17][NH2:18])[C:11](=[O:13])[CH3:12]Crude 3,7-dibenzamidoheptan-2-one (123 g, 0.35 mol) was hydrolysed by heating under reflux with concentrated HCl for 18 hours to give 3,7-diaminoheptan-2-one dihydrochloride (49 g, 65%), m.p. 160°-166° (MeCN). δ(60 MHzD2O) 4.3 (t,CH), 3.1 (t,NHC2), 2.35 (s,CH3), 1.7 (m(CH2)3).
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