[CH2:1]([N:3]([CH2:11][CH3:12])[C:4]1[CH:9]=[CH:8][C:7]([NH2:10])=[CH:6][CH:5]=1)[CH3:2].[ClH:13]>C(OCC)C>[ClH:13].[ClH:13].[CH2:11]([N:3]([CH2:1][CH3:2])[C:4]1[CH:9]=[CH:8][C:7]([NH2:10])=[CH:6][CH:5]=1)[CH3:12]N,N-diethyl-p-phenylenediamine (5 g, 30.4 mmol) was dissolved in diethyl ether (25 cm3) and hydrochloric acid (6 cm3, 10 M) was added and the mixture was concentrated to give the title compound (7.22 g, 100%) as a red/brown solid. dH (250 MHz; D2O): 7.68 (4H, m, ArH), 3.69 (4H, q, 7.32, NCH2), 1.11 (6H, t, 7.32, CH3); dC (62.9 MHz; D2O): 12.1 (CH3), 56.4 (NCH2), 126.8 (ArC), 127.6 (ArC), 135.5 (ArC), 139.1 (ArC).
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