15782-02-2Relevant academic research and scientific papers
Synthesis, experimental and DFT studies on crystal structure, FT-IR, 1H, and 13C NMR spectra, and evaluation of aromaticity of three derivatives of xanthens
Zare Fekri,Nikpassand,Goldoost
, p. 2352 - 2360 (2013)
Several derivatives of xanthenes are prepared by the condensation of aldehydes and dimedone in H2O in the presence of a catalytic amount of trichlorotriazine. The crystalline products were characterized by FTIR, 1H, and 13
The cellulose aluminum oxide composite-supported imidazolium chloroaluminate ionic liquid as a novel and stable heterogeneous catalyst
Boroujeni, Kaveh Parvanak,Tahani, Parisa
, p. 1150 - 1156 (2017)
1-Methyl-3-(triethoxysilylpropyl)imidazolium chloroaluminate ionic liquid anchored on a composite of cellulose and aluminum oxide was easily synthesized and tested for its catalytic activity in one-pot Knoevenagel condensation, Michael addition, and cyclo
Reaction in dry media: Silica gel supported ferric chloride catalyzed synthesis of 1,8-dioxo-octahydroxanthene derivatives
Shaterian, Hamid Reza,Hosseinian, Asghar,Ghashang, Majid
, p. 3136 - 3144 (2008)
Herein, we describe a green procedure for the one-pot preparation of 1,8-dioxo-octahydroxanthene derivatives by condensation of dimedone and substituted benzaldehydes in the presence of FeCl3-SiO2 as an efficient and heterogeneous catalyst under microwave
Mild and highly efficient method for synthesis of 14-Aryl(alkyl)-14H- dibenzo[a,j]xanthenes and 1,8-dioxooctahydroxanthene derivatives using pentafluorophenyl ammonium triflate as a novel organocatalyst
Khaksar, Samad,Behzadi, Nosratollah
, p. 982 - 985 (2012)
A simple and facile synthesis of 14-aryl and alkyl-14H-dibenzo[a,j] xanthenes and 1,8-dioxooctahydroxanthene derivatives has been successfully developed by treatment of β-naphthol or dimedone with aldehydes under mild conditions in the presence of a penta
Magnetically recoverable, nanoscale-supported heteropoly acid catalyst for green synthesis of biologically active compounds in water
Rafiee, Ezzat,Eavani, Sara,Khodayari, Maryam
, p. 1513 - 1518 (2013)
12-Tungstophosphoric acid supported on aerosil silica and silica-coated γ-Fe2O3 nanoparticles was prepared and characterized using transmission electron microscopy, scanning electron microscopy, and inductively coupled plasma atomic emission spectroscopy. The catalytic activity of the two prepared catalysts was compared in the synthesis of 1,8-dioxo-9,10- diaryldecahydroacridines in water. 12-Tungstophosphoric acid was highly dispersed on the silica-coated γ-Fe2O3 nanoparticles and showed higher activity and a higher reuse number compared with the acid supported on aerosil silica. The catalyst could be recovered simply by using an external magnetic field and could be reused several times without appreciable loss of its catalytic activity.
Neat synthesis of octahydroxanthene-1,8-diones, catalyzed by silicotungstic acid as an efficient reusable inorganic catalyst
Davoodnia,Basafa,Tavakoli-Hoseini
, p. 1132 - 1136 (2016)
In this article, the first use of silicotungstic acid (H4SiW12O40) as a catalyst for the synthesis of octahydroxanthene-1,8-diones by the reaction of 5,5-dimethylcyclohexane-1,3-dione (dimedone) with various aldehydes unde
Aqueous synthesis of 1,8-dioxo-octahydroxanthenes using supported cobalt nanoparticles as a highly efficient and recyclable nanocatalyst
Rajabi, Fatemeh,Dios, María Pinilla-de,Abdollahi, Mohammad,Luque, Rafael
, p. 95 - 100 (2019)
A highly efficient and environmentally friendly approach for the synthesis of 1,8-dioxo- octahydroxanthenes has been developed catalysed by a supported cobalt nanoparticle catalyst (CoNP@SBA-15) in water. The use of this heterogeneous catalytic system off
Calcined oyster shell nanoparticles (COS NPs): a new, efficient and reusable catalyst for one-pot rapid preparation of 1,8-dioxo-octahydroxanthenes under solvent-free conditions
Mohammadian, Narges,Akhlaghinia, Batool
, p. 1085 - 1103 (2018)
Calcined oyster shell nanoparticles (COS NPs) as a novel heterogeneous nanocatalyst were prepared and fully characterized by X-ray fluorescence analysis, Fourier transform infrared spectroscopy, X-ray powder diffraction, scanning electron microscopy equip
One-pot solvent-free synthesis of 1,8-dioxo-octahydroxanthene derivatives using sulfonic acid-functionalized LUS-1 and their antimicrobial activities
Rahimifard, Mahshid,Mohammadi Ziarani, Ghodsi,Badiei, Alireza,Asadi, Shima,Abolhasani Soorki, Ali
, p. 3847 - 3861 (2016)
An efficient acidic functionalization of mesoporous silica LUS-1 (Laval University silica) was carried out by grafting and oxidation of (3-mercaptopropyl)trimethoxysilane. The functionalized LUS-1 was characterized by different methods such as TGA, XRD, B
Synthesis of xanthenediones by silica supported orthophosphoric acid (H3PO4·SiO2)
Patil, Rahul S.,Shendage, Suresh S.,Lad, Uday P.,More, Uttam B.
, p. 2343 - 2346 (2018)
The novel protocol was developed for the synthesis of xanthenediones by silica supported orthophosphoric acid (H3PO4·SiO2) as a heterogeneous catalyst. The reported protocol is simple, scalable, mild and effective for the synthesis of xanthenediones. The (H3PO4·SiO2) catalyst demonstrated excellent catalytic activity for various substituted aromatic aldehydes. This catalyst can be reused four times without much loss in catalytic activity.
