A Facile Microwave and SnCl2 Synthesis of 2,3-Dihydroquinazolin-4(1H)-ones
作者:Nicholas S. O'Brien、Adam McCluskey
DOI:10.1071/ch20101
日期:——
An elegantly simple, facile, and robust approach to a scaffold of biological importance, 2,3-dihydroquinazolin-4(1H)-ones, is reported. A catalytic 1 % SnCl2/microwave-mediated approach afforded access to pure material, collected by cooling and filtration after 20-min microwave irradiation at 120°C. A total of 41 analogues were prepared in isolated yields of 17–99 %. This process was highly tolerant
Synthesis and characterization of VO–vanillin complex immobilized on MCM‐41 and its facile catalytic application in the sulfoxidation reaction, and synthesis of 2,3‐dihydroquinazolin‐4(1
<i>H</i>
)‐ones and disulfides in green media
作者:Mohsen Nikoorazm、Maryam Khanmoradi
DOI:10.1002/jccs.201900531
日期:2020.8
as a green oxidant) and also a suitable catalyst for the preparation of 2,3‐dihydroquinazolin‐4(1H )‐one derivatives in water at 90°C. Using this protocol, we show that a variety of disulfides, sulfoxides, and 2,3‐dihydroquinazolin‐4(1H )‐one derivatives can be synthesized in green conditions. The catalyst can be recovered and recycled for further reactions without appreciable loss of catalytic performance
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。
Synthesis of 2,3-dihydroquinazolin-4(1H)-ones catalyzed by succinimide-N-sulfonic acid as a mild and efficient catalyst
A simple, green and environmentally benign procedure was developed for the synthesis of 2,3-dihydro-2-phenylquinazolin-4(1H)-ones using catalytic amounts of succinimide-N-sulfonic acid via the cyclocondensation of 2-aminobenzamide with an aldehyde. The present methodology offers several advantages such as high yields, simple procedure, low cost, short reaction times, mild reaction conditions, and use of a reusable catalyst.
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。