In this study, two recently reported 1,4‐diazabicyclo[2.2.2]octane (DABCO)‐based ionic liquids were used for the acceleration of the N‐formylation of primary and secondary amines with formic acid under solvent‐free conditions. These reagents have also been used for the efficient synthesis of N , N ′‐diaryl formamidines through reaction of triethyl orthoformate with primary aryl amines. These methods offer several advantages such as excellent yields, short reaction times and simple work‐up with the environmentally friendly procedure.

中文翻译：

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引入两种新的布朗斯台德酸性离子液体用于胺的甲酰胺和甲am衍生化

在这项研究中，最近使用了两种基于1,4-二氮杂双环[2.2.2]辛烷（DABCO）的离子液体，在无溶剂条件下用甲酸加速了伯胺和仲胺的N甲酰化。这些试剂也已用于通过原甲酸三乙酯与伯芳基胺的反应有效合成N，N'-二芳基甲am。这些方法具有许多优点，例如，产率高，反应时间短，使用环保程序的后处理简单。