Substitution reactions of 2,3-dichloropyrazine, 3,6-dichloropyridazine, 2,4,6-trichloro-1,3,5-triazine, 2,6-dichloropurine, and N-tosyl-2,4,5-tribromo-imidazole with 4-(dimethylamino)pyridine to monocationic, dicationic, and tricationic hetarenium salts are described.

中文翻译：

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4-(二甲氨基)吡啶鎓取代吡嗪、哒嗪、1,3,5-三嗪、嘌呤和咪唑的合成

2,3-二氯吡嗪、3,6-二氯哒嗪、2,4,6-三氯-1,3,5-三嗪、2,6-二氯嘌呤和 N-甲苯磺酰基-2,4,5-三溴-的取代反应描述了咪唑与 4-(二甲氨基) 吡啶到单阳离子、双阳离子和三阳离子 hetarenium 盐。