制备了封装在多孔碳壳中的绿色且稳定的磁性 Fe 3 O 4核。然后,合成的 Fe 3 O 4 @meso-C 表面固定有活化的 4-氨基苯磺酸以获得 Fe 3 O 4 @C/Ph-SO 3 H。合成 Fe 的结构、物理化学和磁性3 O 4 @C/Ph-SO 3 H 催化剂使用各种分析,如 FT-IR 光谱、TGA、XRD、SEM、TEM。研究了 EDX 和 VSM。Fe 3 O 4 @C/Ph—SO 3H 用作稳定且可回收的酸催化剂,用于在温和条件下区域选择性三组分合成四唑并喹唑啉。由于具有活性 SO 3 H 基团,该催化剂提供了一种一次性的绿色方案,在温和条件下反应,产率高,并且能够回收和再利用而不会显着降低活性。
A green and cost-effective protocol developed using covalently bonded sulfamic acid graphitic carbon nitride (g-C3N4/NHSO3H) for the synthesis of quinazoline derivatives using three-component condensation reaction of benzaldehyde, 2-aminotetrazole and dimedone. The XRD, TEM, SEM, EDX and FT-IR techniques were used to identify the physical and chemical properties of g-C3N4/NHSO3H. The -NHSO3H solid catalyst, was reused eight times without significant decrease in activity. This catalyst acts as a benign acid catalyst, a green protocol of a one-pot due to having significant advantages such as active sites containing SO3H groups, reacting under mild conditions with high efficiency as well as the ability to recover and reuse without decreasing activity. (C) 2019 Elsevier Ltd. All rights reserved.
作者:V. L. Gein、M. I. Kazantseva、T. M. Zamaraeva、L. F. Gein、P. A. Slepukhin
DOI:10.1134/s1070363215080332
日期:2015.8
Sustainable design and novel synthesis of highly recyclable magnetic carbon containing aromatic sulfonic acid: Fe
<sub>3</sub>
O
<sub>4</sub>
@C/Ph—SO
<sub>3</sub>
H as green solid acid promoted regioselective synthesis of tetrazoloquinazolines
Fe3O4@meso-C immobilized with activated 4-aminobenzenesulfonic acid to achieve Fe3O4@C/Ph—SO3H. Structural, physico-chemical, and magnetic properties of synthesized Fe3O4@C/Ph—SO3H catalyst using various analyses such as FT-IR spectroscopy, TGA, XRD, SEM, TEM. EDX, and VSM were investigated. Fe3O4@C/Ph—SO3H was used as a stable and recoverable acid catalyst for regioselective three-component synthesis of
制备了封装在多孔碳壳中的绿色且稳定的磁性 Fe 3 O 4核。然后,合成的 Fe 3 O 4 @meso-C 表面固定有活化的 4-氨基苯磺酸以获得 Fe 3 O 4 @C/Ph-SO 3 H。合成 Fe 的结构、物理化学和磁性3 O 4 @C/Ph-SO 3 H 催化剂使用各种分析,如 FT-IR 光谱、TGA、XRD、SEM、TEM。研究了 EDX 和 VSM。Fe 3 O 4 @C/Ph—SO 3H 用作稳定且可回收的酸催化剂,用于在温和条件下区域选择性三组分合成四唑并喹唑啉。由于具有活性 SO 3 H 基团,该催化剂提供了一种一次性的绿色方案,在温和条件下反应,产率高,并且能够回收和再利用而不会显着降低活性。