Abstract

Bisulfate-functionalized dicationic ionic liquid grafted with silica-coated nano-Fe₃O₄ (nano-[Fe₃O₄@SiO₂@BDIL] or NFSBDI) was synthesized as a novel nanomagnetic material, and its structure was confirmed by EDS, FE-SEM, FT-IR, VSM, XRD and TGA. Afterward, it was utilized as an efficient, magnetically recyclable and dual-functional catalyst for the preparation of an important class of uracil-containing heterocycles, namely pyrimido[4,5-b]quinolines. The one-pot multicomponent reaction of dimedone, arylaldehydes and 6-amino-1,3-dimethyluracil in the presence of NFSBDI under solvent-free conditions afforded pyrimido[4,5-b]quinolines in high yields and short times.

Graphical abstract

中文翻译：

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二氧化硅包覆的纳米Fe 3 O 4接枝的阳离子型离子液体，作为制备含尿嘧啶杂环的新型高效催化剂

摘要

合成了一种新型的纳米磁性材料，接枝了二氧化硅包覆的纳米Fe ₃ O ₄（纳米-[Fe ₃ O ₄ @SiO ₂ @BDIL]或NFSBDI）接枝的硫酸氢盐官能化的离子型离子液体，并通过EDS证实了其结构， FE-SEM，FT-IR，VSM，XRD和TGA。此后，它被用作一种高效，可磁回收和双功能的催化剂，用于制备一类重要的含尿嘧啶的杂环，即嘧啶并[4,5- b ]喹啉。在无溶剂条件下，在NFSBDI存在下，二甲酮，芳醛和6-氨基-1,3-二甲基尿嘧啶的一锅多组分反应提供了嘧啶基[4,5- b高产和短时间的]喹啉。

图形概要