Heterogeneous Cu(<scp>ii</scp>)/<scp>l</scp>-His@Fe<sub>3</sub>O<sub>4</sub> nanocatalyst: a novel, efficient and magnetically-recoverable catalyst for organic transformations in green solvents
A novel, efficient and green Cu(II)/L-His@Fe3O4 catalyst has been applied successfully in the synthesis of heterocyclic compounds. The resulting catalyst was used in the synthesis of 2,3-dihydroquinazolin-4(1H)-ones, polyhydroquinolines and 2-amino-6-(arylthio)pyridine-3,5-dicarbonitriles as biologically interesting compounds. The present research is focused on investigation of recycling, reusability
一种新颖,高效,绿色的Cu(II)/ L- His @ Fe 3 O 4催化剂已成功用于杂环化合物的合成。所得催化剂用于合成2,3-二氢喹唑啉-4(1H)-酮,聚氢喹啉和2-氨基-6-(芳硫基)吡啶-3,5-二碳腈作为生物学上感兴趣的化合物。本研究的重点是研究相反应中催化剂的循环利用,可重复使用性和稳定性。Cu(II)/ L -His @ Fe 3 O 4该催化剂至少使用了六次,其活性与新鲜催化剂相当。通过TGA / DTG,EDS,XRD,VSM,FT-IR和SEM对催化剂的化学组成和结构进行了分析。
BF<sub>3</sub>-grafted Fe<sub>3</sub>O<sub>4</sub>@Sucrose nanoparticles as a highly-efficient acid catalyst for syntheses of Dihydroquinazolinones (DHQZs) and Bis 3-Indolyl Methanes (BIMs)
core and grafting of boron trifluoride (BF3) onto the new surface. The catalytic activity of these nanoparticles was tested in syntheses of Dihydroquinazolinones (DHQZs) and Bis (3‐Indolyl) Methanes (BIMs) as two fruitful pharmaceutical structures. Acidic capacity, FT‐IR, XRD, VSM, TGA and SEM–EDX tests are carried out on such novel nanoparticles (NPs). Catalyst has shown more acidic capacity per one
当前的论文表示将蔗糖固定在Fe 3 O 4核上并将三氟化硼(BF 3)接枝到新表面上。在二氢喹唑啉酮(DHQZs)和双(3-吲哚基)甲烷(BIM)的合成中,作为两种卓有成效的药物结构,测试了这些纳米颗粒的催化活性。对这种新型纳米颗粒(NP)进行了酸性容量,FT-IR,XRD,VSM,TGA和SEM-EDX测试。与以前报道的磺化同系物相比,催化剂每1克NP的酸容量更高。
Efficient preparation of boehmite silica dopamine sulfamic acid as a novel nanostructured compound and its application as a catalyst in some organic reactions
followed by coating with silica and reacting with chlorosulfunic acid to obtain boehmite silica dopamine sulfamic acid (boehmite-Si-DSA). This compound was characterized by FT-IR spectroscopy, TGA, XRD, TEM and SEM techniques. Boehmite-Si-DSA was used as an efficient, recoverable and thermally stable heterogeneous nanocatalyst for the preparation of 2,3-dihydroquinazolin-4(1H)-one, sulfoxides and disulfides
Facile and efficient protocols for C–C and C–N bond formation reactions using a superparamagnetic palladium complex as reusable catalyst
作者:Mohammad Ali Karimi Zarchi、Seyed Shahab Addin Darbandizadeh Mohammad Abadi
DOI:10.1007/s11164-019-03754-y
日期:2019.5
Abstract Facile and efficient protocols for some multicomponent coupling reactions such as the Suzuki reaction and synthesis of polyhydroquinoline and 2,3-dihydroquinazoline-4-(1H)-one derivatives using a superparamagnetic palladium complex as catalyst have been developed. Graphical abstract
The first report on the preparation of boehmite silica sulfuric acid and its applications in some multicomponent organic reactions
作者:Arash Ghorbani-Choghamarani、Bahman Tahmasbi
DOI:10.1039/c5nj02607e
日期:——
first time via an efficientsequential synthetic procedure. Initially, boehmite nanoparticles were prepared, coated by silica, and then reacted with chlorosulfonic acid to obtain boehmite-SSA. A simple, inexpensive, environmentally friendly and efficient procedure for the synthesis of polyhydroquinoline and 2,3-dihydroquinazolin-4(1H)-one derivatives using this compound as an efficient and novel nanocatalyst