Sonochemically synthesized ferromagnetic Fe<sub>3</sub>O<sub>4</sub>nanoparticles as a recyclable catalyst for the preparation of pyrrolo[3,4-c]quinoline-1,3-dione derivatives
作者:Nagaraj Basavegowda、Kanchan Mishra、Yong Rok Lee
DOI:10.1039/c4ra11623b
日期:——
This paper reports the green, rapid synthesis of Fe3O4 nanoparticles by the ultrasonic irradiation of Fe2O3 solution and Perilla frutescens (P. frutescens) leaf extract, which was used as both reducing and capping agent. The synthesized Fe3O4 nanoparticles were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy dispersive X-ray analysis, vibrating sample magnetometry, thermogravimetric analysis (TGA) and X-ray photoelectron spectroscopy (XPS). The FT-IR spectra indicated that the bioactive molecules present in the plant extract contain polyols, which act as a reducing as well as capping agent, as confirmed by TGA. TEM and SEM showed that the Fe3O4 nanoparticles were approximately spherical in shape with a mean size of 50 nm. The synthesized Fe3O4 nanoparticles exhibited ferromagnetic behavior with a saturation magnetization of 25.15 emu g−1. The Fe3O4 nanoparticles, with their easy recovery by an external magnetic field, exhibited strong catalytic activity towards pyrrolo[3,4-c]quinoline-1,3-dione derivatives. These results suggest that the Fe3O4 nanoparticles produced can be applied as a catalyst in organic synthesis and recycled at least five times without significant loss in its activity.
Efficient one-step synthesis of pyrrolo[3,4-c]quinoline-1,3-dione derivatives by organocatalytic cascade reactions of isatins and β-ketoamides
作者:Likai Xia、Yong Rok Lee
DOI:10.1039/c3ob40791h
日期:——
We describe an efficient one-step synthesis of pyrrolo[3,4-c]quinolinedione derivatives using ethylenediamine diacetate (EDDA)-catalyzed cascade reactions of isatins and β-ketoamides. It is the first direct conversion of isatins to pyrrolo[3,4-c]quinolinedione derivatives via C–N bond cleavage and isatin ring expansion. Furthermore, this reaction provides a one-step synthetic route for the production
我们描述了一种高效的一步合成吡咯并[3,4- c ]喹啉二酮衍生物,使用乙二胺二乙酸酯(EDDA)催化的isatins和β-ketoamides级联反应。这是首次通过C–N键断裂和Isatin环扩环将Isatins直接转化为吡咯并[3,4- c ] quinolinedione衍生物。此外,该反应提供了一步合成路线,用于生产通常使用多步反应制备的生物学上感兴趣的复杂分子。
Discovery of a new class of potent pyrrolo[3,4-c]quinoline-1,3-diones based inhibitors of human dihydroorotate dehydrogenase: Synthesis, pharmacological and toxicological evaluation
作者:Marina G. Dimitrijević、Cornelia Roschger、Kevin Lang、Andreas Zierer、Milica G. Paunović、Ana D. Obradović、Miloš M. Matić、Marijana Pocrnić、Nives Galić、Andrija Ćirić、Milan D. Joksović
DOI:10.1016/j.bioorg.2024.107359
日期:2024.6
Twenty -substituted pyrrolo[3,4-]quinoline-1,3-diones were synthesized by a cyclization reaction of Pfitzinger's quinoline ester precursor with the selected aromatic, heteroaromatic and aliphaticamines. The structures of all derivatives were confirmed by IR, H NMR, C NMR and HRMS spectra, while their purity was determined using HPLC techniques. Almost all compounds were identified as a new class ofpotent
[EN] QUINOLINE-CARBOXYLIC ACIDS AND THE DERIVATIVES THEREOF, A FOCUSED LIBRARY<br/>[FR] ACIDES QUINOLINE-CARBOXYLIQUES ET LEURS DERIVES ET BIBLIOTHEQUE FOCALISEE
申请人:CHEMICAL DIVERSITY RES INST LT
公开号:WO2004078731A1
公开(公告)日:2004-09-16
The invention relates to compounds, substituted guinoline-carboxylic acids and the derivatives thereof of general formula (1, 2, 3), the pharmaceutically acceptable salts thereof, N-oxides or hydrates and methods for the production thereof, a focused library, pharmaceutical compounds and the use thereof. Said compounds are embodied in the form of Caspase enzyme inhibitors and usefully used for curing various diseases associated to an increased apoptosis activity.
Convenient one-step synthesis of pyrrolo[3,4-c]quinolin-1-ones via TMSCl-catalyzed cascade reactions of isatins and β-enamino ketones
An efficient and facile synthesis of pyrrolo[3,4-c]quinoline-1-ones by TMSCl-catalyzed reaction of easily available substituted isatins and [small beta]-enamino ketone derivatives has been developed. This cascade reaction has shown good functional group...