[CH2:1]([N:7]1[CH2:12][CH2:11][NH:10][CH2:9][CH2:8]1)[CH2:2][CH2:3][CH2:4][CH2:5][CH3:6].[Cl:13][CH2:14][CH2:15][C:16](=[O:20])[CH2:17][CH2:18][CH3:19].[ClH:21].CCOCC>C(O)(C)C>[ClH:13].[ClH:21].[CH2:1]([N:7]1[CH2:8][CH2:9][N:10]([CH2:14][CH2:15][C:16](=[O:20])[CH2:17][CH2:18][CH3:19])[CH2:11][CH2:12]1)[CH2:2][CH2:3][CH2:4][CH2:5][CH3:6]A mixture of 15.3 g (0.09 mole) of n-hexyl piperazine and 12.3 g (0.091 mole) of 1-chloro-3-hexanone was heated to 100° C. for 5 minutes, cooled and dissolved in isopropanol. Isopropanolic HCl was added until acidic. Ether was added and the salt was filtered off. The product was crystallized from acetonitrile to yield 16.5 g of product with a melting point of 225°-230° C.
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