Fibrous nanosilica spheres KCC-1@NH2 as highly effective and easily retrievable catalyst for the synthesis of chromenes
作者:Hourieh Sadat Oboudatian、Javad Safaei-Ghomi
DOI:10.1007/s11164-022-04695-9
日期:2022.5
A three-component reaction of naphthalene-1,5-diol, malononitrile and aromatic aldehydes has been achieved in the presence of fibrous nanosilica spheres KCC-1@NH2 as highly effective heterogeneous catalysts to produce of chromenes. In this study, simple and effective methods were used for the preparation of nanosilica spheres KCC-1@NH2 as basic catalysts. A fibrous surface morphology, high surface area, high mechanical stability, the easy separation of the nanocatalyst and the recyclability, nontoxicity, versatility, combined with low reaction times and excellent yields, make the present protocol very useful for the synthesis of the chromenes. The catalyst has been characterized by FT-IR, XRD, EDX, FE-SEM, TEM, BET and TGA. Also, the synthesized products were confirmed by 1H-NMR, 13C-NMR, FT-IR.
在纤维状纳米二氧化硅球 KCC-1@NH2 作为高效异相催化剂存在下,实现了萘-1,5-二醇、丙二腈和芳香醛的三组分反应,生成了色烯。本研究采用简单有效的方法制备了作为碱性催化剂的纳米二氧化硅球 KCC-1@NH2。纤维状的表面形态、高比表面积、高机械稳定性、纳米催化剂的易分离性、可回收性、无毒性、多功能性,再加上反应时间短、收率高,使本方案非常适用于合成色烯。傅立叶变换红外光谱、XRD、EDX、FE-SEM、TEM、BET 和 TGA 对催化剂进行了表征。此外,还通过 1H-NMR、13C-NMR 和 FT-IR 对合成产物进行了确认。