[Cl-:1].C(=[N:9][N+:10]1[CH:14]=[CH:13][N:12]([CH2:15][C:16]2[CH:21]=[C:20]([O:22][CH3:23])[C:19]([O:24][CH3:25])=[C:18]([O:26][CH3:27])[CH:17]=2)[C:11]=1[CH2:28][CH3:29])C1C=CC=CC=1.Cl>O>[Cl-:1].[NH2:9][N+:10]1[CH:14]=[CH:13][N:12]([CH2:15][C:16]2[CH:21]=[C:20]([O:22][CH3:23])[C:19]([O:24][CH3:25])=[C:18]([O:26][CH3:27])[CH:17]=2)[C:11]=1[CH2:28][CH3:29](ii.b) 3.1 g of 1-benzylideneamino-2-ethyl-3-(3,4,5-trimethoxybenzyl)imidazolium chloride are dissolved in 70 ml of water, whereupon the solution is treated with 8 ml of 25 percent hydrochloric acid. The resulting benzaldehyde is removed by steam distillation. After evaporation, the product is recrystallized from ethanol/ether. There is obtained 1-amino-2-ethyl-3-(3,4,5-trimethoxy-benzyl)imidazolium chloride of melting point 174°.
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