Fe 3 O 4 @SiO 2上新型不对称配体及其包含离子液体(ILs)基团的钴配合物的制备和表征,通过1 H-NMR、13 C-NMR、FTIR、SEM、EDX、TGA、XRD、和VSM。该催化剂用于由醇制备色烯化合物的反应。研究了催化剂用量、温度、溶剂和溶剂用量作为影响反应的因素。为了在最佳条件下合成色烯衍生物,醇衍生物首先被催化剂氧化,然后将丙二腈和二酮添加到反应容器中。对催化剂的回收和再利用进行了研究,结果显示出良好的结果。离子液体基团的存在增加了多相催化剂在绿色溶剂中的溶解度,从而提高了效率并减少了反应时间。 图形概要
Efficient synthesis of 2-amino-3-cyano-4H-pyran derivatives via a non-catalytic one-pot three-component reaction
作者:Cheng-Wei Lü、Jia-Jing Wang、Fei Li、Shi-Jun Yu、Yue An
DOI:10.1007/s11164-017-3151-9
日期:2018.2
Abstract A convenient one-pot multi-component strategy was conducted successfully under catalyst-free conditions employing water and PEG-400 as the efficient and cheap promoting medium. Three types and nearly 50 2-amino-3-cyano-4H-pyran annulated derivatives were synthesized in good to excellent yields by the condensation of a series of aromatic aldehydes with malononitrile and different 1,3-dicarbonyl