1-Methylimidazolium tricyanomethanide {[HMIM]C(CN)3} as a nano structure and reusable molten salt catalyst for the synthesis of tetrahydrobenzo[b]pyrans via tandem Knoevenagel-Michael cyclocondensation and 3,4-dihydropyrano[c]chromene derivatives
作者:Mohammad Ali Zolfigol、Neda Bahrami-Nejad、Fatemeh Afsharnadery、Saeed Baghery
DOI:10.1016/j.molliq.2016.06.069
日期:2016.9
An expeditious, experimentally simple and rapid 1-methylimidazolium tricyanomethanide [HMIM]C(CN)3} nano molten salt (NMS) catalyzed tandem Knoevenagel-Michael cyclocondensation procedure for the synthesis of tetrahydrobenzo[b]pyrans was described via reaction between dimedone, aromatic aldehyde and malononitrile under solvent-free conditions at room temperature. Furthermore, 3,4-dihydropyrano[c]chromene
通过二甲酮之间的反应,描述了一种快速,实验简单且快速的三氰基甲基1-甲基咪唑鎓[HMIM] C(CN)3 }纳米熔融盐(NMS)催化串联Knoevenagel-Michael环缩合反应合成四氢苯并[ b ]吡喃的方法,室温下在无溶剂条件下的芳族醛和丙二腈。此外,在相同条件下,以[HMIM] C(CN)3 } NMS为催化量,通过4-羟基香豆素,芳香醛和丙二腈的缩合反应合成了3,4-二氢吡喃并[ c ]色烯衍生物。
Nano-Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>-supported boron sulfonic acid as a novel magnetically heterogeneous catalyst for the synthesis of pyrano coumarins
magnetically heterogeneouscatalyst based on the immobilization of boron sulfonicacid onto Fe3O4@SiO2 nanoparticles (Fe3O4@SiO2–BSA) is reported. Fe3O4@SiO2–BSA was characterized via FT-IR, X-ray diffraction patterns (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and vibrating sample magnetometer (VSM) analysis. The performance ability of this catalyst including
在这项研究中,报道了一种基于硼磺酸固定在Fe 3 O 4 @SiO 2纳米颗粒(Fe 3 O 4 @SiO 2 -BSA)上的新型磁性非均相催化剂。Fe 3 O 4 @SiO 2 –BSA通过FT-IR,X射线衍射图(XRD),扫描电子显微镜(SEM),能量色散X射线光谱(EDS)和振动样品磁力计(VSM)分析。在无溶剂条件下以高收率评估了该催化剂包括酸位点的性能,以合成吡喃香豆素。催化剂的热稳定性及其易于被磁场分离,使该催化剂成为良好的多相体系,并且是其他多相催化剂的有用替代品。
Zn (II)‐Schiff base covalently anchored to CaO@SiO
<sub>2</sub>
: A hybrid nanocatalyst for green synthesis of 4
<i>H</i>
‐pyrans
作者:Fatemeh Sameri、Mohammad Ali Bodaghifard、Akbar Mobinikhaledi
DOI:10.1002/aoc.6394
日期:2021.11
In this study, the Zn (II)-Schiff basecovalentlyanchored onto the surface of CaO@SiO2 nanoparticles. The structure of this hybrid nanomaterial (CaO@SiO2-NH2-Sal-Zn) was characterized using the analytical techniques such as Fourier transform infrared spectroscopy, field emission-scanning electron microscopy, X-ray powder diffraction, energy-dispersive X-ray spectroscopy, transmission electron microscopy
High-efficient synthesis of 2-imino-2H-chromenes and dihydropyrano[c]chromenes using novel and green catalyst (CaO@SiO2@AIL)
作者:Fatemeh Sameri、Akbar Mobinikhaledi、Mohammad Ali Bodaghifard
DOI:10.1007/s11164-020-04295-5
日期:2021.2
recyclable heterogeneous ionicliquid catalyst was synthesized. Catalytic activity of the CaO@SiO 2 @AIL hybrid nanoparticles was investigated for synthesis of the pharmaceutically valuable 2-imino-2 H- chromene and dihydropyrano[ c ]chromenederivatives. A wide range of amines and aromatic aldehydes containing either electron-withdrawing or electron-donating substituent were examined using optimized conditions