- Design and characterization of [(Et)3?N-H]FeCl4 as a nanomagnetic ionic liquid catalyst for the synthesis of xanthene derivatives under solvent-free conditions
-
The triethylamine-based nanomagnetic ionic liquid, [(Et)3?N-H]FeCl4, was synthesized, and its structural and chemical characteristics were detected. The thermogravimetric analysis indicated its high thermal stability with a decomposi
- Ezabadi, Ali,Salami, Masoumeh
-
-
- Basic ionic liquid anchored on UiO-66-NH2 metal–organic framework: a stable and efficient heterogeneous catalyst for synthesis of xanthenes
-
In this study, the Zr-based metal–organic framework, UiO-66-NH2, was modified with ionic liquid (dibutylimidazolium bromide) to generate a platform for supporting an organocatalyst of guanidine. After an anion exchange, the prepared hybrid syst
- Askari, Saeed,Khodaei, Mohammad Mehdi,Jafarzadeh, Mohammad
-
p. 2881 - 2899
(2021/04/09)
-
- Acidic polymer containing sulfunic acid and carboxylic acid groups heterogenized with natural clay: A novel metal free and heterogeneous catalyst for acid-catalyzed reactions
-
A novel metal-free solid acid catalyst, PHSA, has been designed and synthesized through facile and environmentally benign procedure via using halloysite nanoclay as a natural and biocompatible support. The synthetic protocol included co-polymerization of
- Akbari, Maryam,Heravi, Majid M.,Kahangi, Fatemeh Ghoreyshi,Sadjadi, Samahe
-
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- Heterogeneous SO3H@Fe3O4 magnetic nanocatalyst as an efficient and reusable medium for the synthesis of 3,3′-(arylmethylene)-bis-(4-hydroxycoumarin), bis-(indolyl)-methane, and 1,8-dioxo-octahydroxanthene derivatives
-
This work aimed to synthesize a new heterogeneous catalyst (SO3H@Fe3O4 magnetic nanoparticles) and the study of its catalytic behavior in synthesizing 3,3′-(arylmethylene)-bis-(4-hydroxycoumarin), bis-(indolyl)-methane, an
- Wu, Xiaobo,Peng, Wan-Xi
-
p. 2129 - 2148
(2020/06/24)
-
- Ag nanoparticles stabilized on cyclodextrin polymer decorated with multi-nitrogen atom containing polymer: An efficient catalyst for the synthesis of xanthenes
-
In attempt to broaden the use of cyclodextrin polymer for catalytic purposes, a novel covalent hybrid system was prepared through growth of multi-nitrogen atom containing polymer (PMelamine) derived from reaction of ethylenediamine and 2,4,6-trichloro-1,3
- Dorraj, Masoumeh,Heravi, Majid M.,Kahangi, Fatemeh Ghoreyshi,Sadjadi, Samahe
-
-
- Grafting of sulphamic acid on functionalized sawdust: A novel solid acid catalyst for the synthesis of 1,8-dioxo-octahydroxanthenes
-
Abstract: A solid acid catalyst bearing sulphamic acid on sawdust (SA@Sawdust) was designed as a novel heterogeneous catalyst. The structure of prepared catalyst was assessed by various spectroscopic techniques such as FT-IR, field emission scanning elect
- Karhale, Shrikrishna
-
p. 3085 - 3096
(2020/04/09)
-
- An expedient and straightforward solvent-free synthesis of 1,8-dioxo-octahydroxanthenes using eco-friendly aluminized polyborate catalyst
-
The present work deals with a catalytic application of aluminized polyborate as a mild solid acid catalyst for multicomponent synthesis of 1,8-dioxo-octahydroxanthenes under solvent-free condition at 100°C-110°C. It involves selective domino Knoevenagel-M
- Aute, Dilip,Kshirsagar, Akshay,Uphade, Bhagwat,Gadhave, Anil
-
p. 3691 - 3702
(2020/08/19)
-
- One-pot three-component synthesis of 1,8-dioxooctahydroxanthenes and 14-Aryl-14Hdibenzo[a,j]xanthenes using a new nanostructure zeolite
-
Abstract: A new modified zeolite containing Fe nanoparticles loaded in zeolite X (Fe-X) has been synthesized and characterized by FT-IR, XRD, EDX and SEM techniques and its catalytic activity has been investigated in the synthesis of two series of xanthen
- Hojati, Seyedeh Fatemeh,Moosavifar, Maryam,Moeinieghbali, Nasrin
-
-
- Aqueous synthesis of 1,8-dioxo-octahydroxanthenes using supported cobalt nanoparticles as a highly efficient and recyclable nanocatalyst
-
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
- Rajabi, Fatemeh,Dios, María Pinilla-de,Abdollahi, Mohammad,Luque, Rafael
-
-
- Immobilized copper-layered nickel ferrite on acid-activated montmorillonite, [(NiFe2O4?Cu)(H+-Mont)], as a superior magnetic nanocatalyst for the green synthesis of xanthene derivatives
-
In this study, the immobilization of copper-layered nickel ferrite on the surface and in the cavities of acid-activated montmorillonite (H+-Mont) was investigated. In this context, magnetic nanoparticles (MNPs) of NiFe2O4
- Zeynizadeh, Behzad,Rahmani, Soleiman
-
p. 28038 - 28052
(2019/09/30)
-
- Synthesis and study of catalytic, anti–bacterial, anti–oxidant, and DNA cleavage properties of Ag–Co and Ag–Ni magnetic nanoparticles
-
Magnetic Ag–Co and Ag–Ni alloy nanoparticles were prepared through a chemical reduction method using their corresponding [Co(NH3)6]Cl3 and [Ni(C2O4)2]K2 complexes, and AgNO3
- Boroujeni, Keveh Pravanak,Shahrokh, Mansooreh,Karvani, Jamshid,Moradi, Niloofar,Farokhnia, Ahmad,Mobini, Mohsen
-
p. 542 - 551
(2019/10/14)
-
- 4-Imidazol-1-yl-butane-1-sulfonic acid or a novel liquid salt? The NMR analysis and dual solvent-catalytic efficiency for one-pot synthesis of xanthenes
-
The reaction of the equimolar mixture of imidazole and 1,4-butane sultone was performed at 90 °C in ethylbenzene for 12 h, and the structure of the product was investigated by the NMR analysis in CD3OD and DMSO?d6. This work demonstr
- Khaligh, Nader Ghaffari,Teng, Lim Shi,Ling, Ong Chiu,Johan, Mohd Rafie,Ching, Juan Joon
-
-
- Graphene Oxide Incorporated Strontium Nanoparticles as a Highly Efficient and Green Acid Catalyst for One-Pot Synthesis of Tetramethyl-9-aryl-hexahydroxanthenes and 13-Aryl-5H-dibenzo[b,i]xanthene-5,7,12,14(13H)-tetraones Under Solvent-Free Conditions
-
An efficient, inexpensive and recyclable graphene oxide/strontium nanocatalyst was synthesized and applied in a pseudo three-component, one-pot cyclocondensation of aromatic aldehydes and dimedone/lowson to afford the corresponding 3,3,6,6-tetramethyl-9-a
- Mousavi, Seyyed Rasul,Rashidi Nodeh, Hamid,Zamiri Afshari, Elham,Foroumadi, Alireza
-
p. 1075 - 1086
(2019/02/09)
-
- V2O5 based quadruple nano-perovskite as a new catalyst for the synthesis of bis and tetrakis heterocyclic compounds
-
In this article, we presented a novel, efficient and facile approach for using strontium titanate supported catalyst in organic synthesis. Bis and tetrakis of coumarin, indole and xanthene derivatives can effortlessly have prepared using V2Osu
- Khatab, Tamer K.,Abdelghany, Amr Mohamed,Soliman, Hanan A.
-
-
- Direct synthesis of xanthenes from benzyl alcohols using choline peroxydisulfate ionic liquid as a reagent under otherwise solvent-free conditions
-
14-Aryl-14H-dibenzo[a,j]xanthenes and 1,8-dioxo-octahydroxanthenes were synthesised directly from benzyl alcohols by a tandem catalytic process using choline peroxydisulfate (ChPS). The synthesis proceeds through two steps: an oxidation of the benzyl alco
- Soleimani, Omid,Hosseinian, Asghar
-
p. 337 - 340
(2018/08/03)
-
- 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
-
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
- Mohammadian, Narges,Akhlaghinia, Batool
-
p. 1085 - 1103
(2017/10/07)
-
- Investigation of catalytic, anti-bacterial, anti-oxidant, and DNA cleavage properties of bimetallic and trimetallic magnetic nanoalloys base on cupper
-
Bimetallic and trimetallic magnetic nanoalloys base on cupper were easily prepared from their starting materials. These nanoparticles (NPs) were used for the synthesis of biscoumarines by two-component one-pot domino Knoevenagel-type condensation/Michael
- Parvanak Boroujeni, Kaveh,Farokhnia, Ahmad,Shahrokh, Mansooreh,Mobini, Mohsen
-
p. 521 - 529
(2019/04/25)
-
- Caffeine-H2SO4: An efficient bio-based catalyst for the one-pot preparation of 1, 8-dioxo-octahydro-xanthenes
-
Caffeine-H2SO4 has been utilized as an efficient acidic catalyst in the one-pot preparation of 1, 8-dioxo-octahydro-xanthenes. Application of Caffeine-H2SO4 has some advantages including short reaction time, hig
- Saghanezhad, Seyyed Jafar
-
-
- Synthesis and characterization of novel binuclear task-specific ionic liquid: an efficient and sustainable sulfonic-functionalized ionic liquid for one-pot synthesis of xanthenes
-
A new binuclear sulfonic-functionalized ionic liquid was synthesized in two steps and its dual solvent-catalytic activity was studied for the synthesis of a variety of xanthenes under mild conditions. The simple experimental and sustainable procedure, goo
- Khaligh, Nader Ghaffari
-
p. 4045 - 4062
(2018/06/19)
-
- Fe3O4@Propylsilane@Histidine[HSO4 -] magnetic nanocatalysts: Synthesis, characterization and catalytic application for highly efficient synthesis of xanthene derivatives
-
The surface of Fe3O4 magnetic nanoparticles (MNPs) was modified by chloropropylsilane and histidine. The imidazole group of prepared Fe3O4@Propylsilane@Histidine MNPs converted to imidazolium hydrogen sulfate gr
- Mousavifar, Seyyedeh Masoumeh,Kefayati, Hassan,Shariati, Shahab
-
-
- Novel CuFe2O4@SiO2-OP2O5H magnetic nanoparticles: Preparation, characterization and first catalytic application to the synthesis of 1,8-dioxo-octahydroxanthenes
-
New functionalized magnetic core–shell nanoparticles, CuFe2O4@SiO2-OP2O5H, were prepared by grafting of phosphorus pentoxide on CuFe2O4@SiO2 nanoparticles and characte
- Tajfirooz, Farzaneh,Davoodnia, Abolghasem,Pordel, Mehdi,Ebrahimi, Mahmoud,Khojastehnezhad, Amir
-
-
- Efficient and clean synthesis of 1,8-dioxooctahydroxanthenes in aqueous medium
-
In this work, an efficient synthesis of 1,8-dioxooctahydroxanthenes in aqueous medium is reported. The reaction was catalyzed by aqueous extract of plant material (pericarp of Sapindus trifoliatus fruit), which makes this protocol 'green' and eco-friendly
- Pore, Santosh B
-
p. 2621 - 2624
(2018/11/10)
-
- Selective and highly efficient synthesis of xanthenedione or tetraketone derivatives catalyzed by ZnO nanorod-decorated graphene oxide
-
ZnO nanorod-decorated graphene oxide (GO/ZnO), containing Lewis and Bronsted acid centers, was introduced as a selective, highly efficient and recoverable nanocatalyst for the pseudo three-component synthesis of diverse tetraketone or xanthenedione derivatives via condensation of aromatic aldehydes with 1,3-dicarbonyl compounds in short reaction times and good to excellent yields in H2O under refluxing and solvent-free conditions, respectively. Moreover, the GO/ZnO nanocomposite was recovered and reused at least four times without a significant decrease in its activity. Low loading of the catalyst, high to excellent yields, the elimination of any toxic heavy metals or corrosive reagents for modification of the catalyst, simple separation and purification of the products, and the reusability of the catalyst are the most significant advantages of this green protocol. The Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2018.
- Hasanzadeh Banakar, Sepideh,Dekamin, Mohammad G.,Yaghoubi, Amene
-
p. 14246 - 14262
(2018/08/29)
-
- Preparation and characterization of a novel room temperature dicationic ionic liquid and its application in the synthesis of xanthenediones under solvent-free conditions
-
Aim and Objective: In the present work, 1, 1’-sulfinyldiethylammonium bis (hydrogen sulfate) as a novel room temperature dicationic ionic liquid was synthesized and used as a catalyst for xanthenediones synthesis. Material and Method: The dicationic ionic
- Ehsani-Nasab, Zainab,Ezabadi, Ali
-
p. 602 - 608
(2019/01/14)
-
- One-pot synthesis of symmetrical and unsymmetrical acridine sulfonamide derivatives catalyzed by p-TSA
-
Abstract: Synthesis of a series of symmetrical and unsymmetrical 1,8-dioxo-octahydroacridine benzenesulfonamide derivatives has been achieved by one-pot, multicomponent reaction of aromatic aldehydes and sulfanilamide with cyclic 1,3-dicarbonyl compounds by using p-toluenesulfonic acid as an effective, cheap, and efficient catalyst. Reaction progress was monitored by thin-layer chromatography (TLC), and products were analyzed by Fourier-transform infrared (FT-IR), 1H and 13C nuclear magnetic resonance (NMR), and mass spectroscopy (MS). Graphical Abstract: [Figure not available: see fulltext.].
- Maheswari, Cinnathambi Subramani,Ramesh, Rathinam,Lalitha, Appaswami
-
p. 4165 - 4173
(2017/06/20)
-
- Natural phosphate as an efficient and green catalyst for synthesis of tetraketone and xanthene derivatives
-
Abstract: Natural phosphate was applied as an efficient and ecofriendly catalyst for the synthesis of tetraketones (2–2.5?h, 90–100?%) and xanthenes (6.5–8.5?h, 84–95?%) via Knoevenagel–Michael cascade reaction of aromatic aldehydes with 1,3-cyclic diketones in water and ethanol, respectively. This protocol provides several advantages over the traditional chemical synthesis, such as simple work-up, easy handling procedure, non-toxicity and stability of catalyst, low cost and environmental friendliness. Graphical Abstract: [Figure not available: see fulltext.]
- Fallah, Azadeh,Tajbakhsh, Mahmood,Vahedi, Hooshang,Bekhradnia, Ahmadreza
-
-
- Magnetite-containing sulfonated polyacrylamide as a nanocatalyst for the preparation of biscoumarins
-
Magnetite-containing sulfonated polyacrylamide was easily prepared through polymerization of the corresponding monomers followed by the reaction with Fe3O4 nanoparticles. The characterization of the obtained catalyst was performed by
- Boroujeni, Kaveh Parvanak,Hadizadeh, Shahla,Hasani, Sodabeh,Fadavi, Abdulhamid,Shahrokh, Mansooreh
-
p. 692 - 700
(2017/09/08)
-
- One-pot synthesis of 9-arylxanthenediones and 9-pyrazoloxanthenediones using [DBU]OAc
-
The synthesis of 9-aryl-1H-xanthene-1,8(2H)-dione derivatives starting from benzaldehydes or synthesized pyrazolcarbaldehydes and dimedone in the presence of 2,3,4,5,7,8,9,10-octahydropyrido[1,2-a]-[1,3]diazepin-1-ium acetate in high yields is reported. T
- Nikpassand,Zare Fekri
-
p. 816 - 820
(2017/05/29)
-
- Rapid, efficient and solvent-free synthesis of (un)symmetrical xanthenes catalyzed by recyclable sulfated polyborate
-
The present study describes a rapid, simple and straightforward approach to the synthesis of 1,8-dioxo-octahydroxanthenes, 14-phenyl-14H-dibenzo[a,j]xanthene and tetrahydrobenzoxanthene-11-ones under solvent-free conditions using sulfated polyborate as a
- Patil, Manisha S.,Palav, Amey V.,Khatri, Chetan K.,Chaturbhuj, Ganesh U.
-
supporting information
p. 2859 - 2864
(2017/06/27)
-
- The cellulose aluminum oxide composite-supported imidazolium chloroaluminate ionic liquid as a novel and stable heterogeneous catalyst
-
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
- Boroujeni, Kaveh Parvanak,Tahani, Parisa
-
p. 1150 - 1156
(2017/08/10)
-
- Solvent-free Synthesis of 1,8-Dioxo-octahydroxanthenes and Tetra-hydrobenzo[a]xanthene-11-ones over Poly(N,N′-dibromo-N-ethylnaphtyl-2,7-sulfonamide)
-
In this work, poly(N,N′-dibromo-N-ethylnaphtyl-2,7-sulfonamide) (PDNES) as a highly efficient catalyst was applied for the synthesis of 1,8-dioxo-octahydroxanthenes and tetra-hydrobenzo[a]xanthene-11-ones under neutral and solvent-free conditions.
- Khazaei, Ardeshir,Rezaei, Mahshid,Moosavi-Zare, Ahmad Reza,Saednia, Shahnaz
-
p. 1088 - 1095
(2017/09/06)
-
- Modified Hantzsch reaction in the presence of chiral organic catalysts
-
Modified Hantzsch reaction in three- and four-component system in the presence of new chiral organic catalysts was investigated and the advantages of this reaction in three-component system compared to four-component one were demonstrated, the influence o
- Magerramov,Guseinov,Akhmedov,Tanyeli, Dj.,Kurbanova
-
p. 701 - 705
(2016/07/06)
-
- Two new magnetic nanocomposites of graphene and 12-tungestophosphoric acid: Characterization and comparison of the catalytic properties in the green synthesis of 1,8-dioxo-octahydroxanthenes
-
Two well dispersed H3PW12O40 immobilized to magnetite graphene oxide (Fe3O4/GO/PW) and magnetite graphene aerogel (Fe3O4/GA/PW) nanocomposites were synthesized, via coprecipitati
- Rafiee,Khodayari
-
p. 36433 - 36440
(2016/05/24)
-
- Applications of a novel nano magnetic catalyst in the synthesis of 1,8-dioxo-octahydroxanthene and dihydropyrano[2,3-c]pyrazole derivatives
-
Imidazole-based ionic liquid-stabilized on silica coated Fe3O4 magnetic nano particles [nano-Fe3O4SiO2(CH2)3-Imidazole-SO3H]Cl as a novel heterogeneous acidic catalyst
- Zolfigol, Mohammad Ali,Ayazi-Nasrabadi, Roya,Baghery, Saeed,Khakyzadeh, Vahid,Azizian, Saeid
-
-
- Carbon nanotube-supported butyl 1-sulfonic acid groups as a novel and environmentally compatible catalyst for the synthesis of 1,8-dioxo-octahydroxanthenes
-
A novel multiwalled carbon nanotube catalyst with -SO3H functional groups was easily prepared from its starting materials and used as an efficient heterogeneous catalyst for one-pot Knoevenagel condensation, Michael addition, and cyclodehydrati
- Boroujeni, Keveh Parvanak,Heidari, Zahra,Khalifeh, Reza
-
p. 602 - 608
(2016/10/12)
-
- A unique opportunity for the utilization of glass wastes as a resource for catalytic applications: toward a cleaner environment
-
Although glass recycling has been conducted since 1970s, and even though recycled glass waste has been used in the construction of various alternative products, the utilization of glass waste for catalytic applications has not been fully considered until
- Zolfagharinia, Somayeh,Koukabi, Nadiya,Kolvari, Eskandar
-
p. 113844 - 113858
(2016/12/24)
-
- Nano-zirconia as an excellent nano support for immobilization of sulfonic acid: A new, efficient and highly recyclable heterogeneous solid acid nanocatalyst for multicomponent reactions
-
Nano-zirconia-supported sulfonic acid [nano-ZrO2-SO3H (n-ZrSA)] is synthesized by immobilizing sulfonic acid groups on the surface of nano zirconium dioxide to produce a novel heterogeneous reusable solid acid nanocatalyst. This new nanocatalyst is characterized by FT-IR spectroscopy, thermogravimetric analysis (TGA), X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), the Hammett acidity function and pH analysis. The introduced nano-zirconia-supported sulfonic acid is used as an efficient and recyclable catalyst for different heterocyclic multicomponent reactions such as the synthesis of hexahydroquinoline, 1,8-dioxo-decahydroacridine, polyhydroquinoline and 1,8-dioxo-octahydroxanthene derivatives. Optimization of the reaction conditions was studied using a central composite design (CCD) which is one of the most widely used response surface methodologies. The newly prepared heterogeneous solid acid nanocatalyst is easily separated and reusable for five cycles without any apparent loss of its catalytic activity, which confirmed the stability of the covalent bonding of the sulfonic acid groups. n-ZrSA has advantages such as its low cost, low toxicity, ease of preparation, good stability, high reusability and operational simplicity.
- Amoozadeh, Ali,Rahmani, Salman,Bitaraf, Mehrnoosh,Abadi, Fatemeh Bolghan,Tabrizian, Elham
-
p. 770 - 780
(2016/01/12)
-
- Sonochemical syntheses of xanthene derivatives using zeolite-supported transition metal catalysts in aqueous media
-
An efficient green method for the syntheses of biologically active xanthene derivatives by use of zeolite-supported transition metal catalysts is described. A Fe-Cu/ZSM-5 heterogeneous catalyst has the highest activity in the one-pot syntheses with a wide
- Safa, Kazem D.,Taheri, Elham,Allahvirdinesbat, Maryam,Niaei, Aligholi
-
p. 2989 - 3004
(2016/04/05)
-
- Solvent influence upon complex formation between different 1,8-dioxo-octahydroxanthene derivatives and yttrium(III) cation in some non-aqueous solvents using conductometric method
-
The complexation reactions between the yttrium(III) cation and (4-chlorophenyl, phenyl, 4-nitrophenyl, 4-methoxyphenyl, 4-methylphenyl) 9-substituted 1,8-dioxo-octahydroxanthene were studied in acetonitrile (AN) and methanol (MeOH) at different temperatur
- Basafa,Davoodnia,Asefifeyzabadi,Sharifi Noghabi,Rounaghi
-
p. 250 - 256
(2016/04/20)
-
- Succinimidinium hydrogensulfate ([H-Suc]HSO4) as a new, green and efficient ionic liquid catalyst for the synthesis of tetrahydrobenzimidazo[2,1-b]quinazolin-1(2H)-one, 1-(benzothiazolylamino)phenylmethyl-2-naphthol, 1, 8-dioxo-octahydroxanthen
-
In this work, succinimidinium hydrogensulfate ([H-Suc]HSO4), a newly reported Br?nsted acidic ionic liquid, is used as an efficient and reusable catalyst in the synthesis of tetrahydrobenzimidazo[2,1-b]quinazolin-1(2H)-ones, 1-(benzothiazolylam
- Goli-Jolodar, Omid,Shirini, Farhad
-
p. 1077 - 1092
(2016/05/02)
-
- Cucurbit[6]uril-OSO3H: A novel acidic nanocatalyst for the one-pot preparation of 14-aryl-14H-dibenzo[a,j]xanthenes and 1,8-dioxo-octahydro-xanthenes
-
Cucurbit[6]uril-OSO3H (CB[6]-OSO3H) has been prepared and used as an efficient acidic nanocatalyst for the one-pot preparation of 14-aryl-14H-dibenzo[a,j]xanthenes and 1,8-dioxo-octahydro-xanthenes. The nanocatalyst was characterized
- Saghanezhad, Seyyed Jafar,Nazari, Yaser,Davod, Fereshteh
-
p. 25525 - 25530
(2016/03/22)
-
- Ruthenium anchored on multi-walled carbon nanotubes: an efficient and reusable catalyst for the synthesis of xanthenes
-
A novel and highly efficient ruthenium-based catalyst was synthesized by immobilizing Ru(CO)4 onto functionalized multi-walled carbon nanotubes. The catalyst was characterized by Fourier-transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, transmission electron microscopy, energy dispersive X-ray analysis, diffuse reflectance UV–Vis spectrophotometry, inductively coupled plasma and elemental analysis. This heterogeneous catalyst was successfully applied in the multi-component synthesis of various xanthene derivatives in good to excellent yields (28 samples, up to 96?% yield) under reflux condition and ultrasonic irradiation. The prepared catalyst was recovered four times without appreciable loss of activity.
- Tabatabaeian, Khalil,Zanjanchi, Mohammad Ali,Mamaghani, Manouchehr,Dadashi, Ali
-
p. 5049 - 5067
(2016/07/06)
-
- Improved synthesis of 2,2-arylmethylene bis(3-hydroxy-5,5-dimethyl-2-cyclohexene-1-one) and 1,8-dioxo-octahydroxanthene derivatives catalyzed by electrogenerated base and sulfuric acid
-
An efficient method has been developed for the synthesis of 1,8-dioxo-octahydroxanthene derivatives in two-step. In the first step, the electrogenerated base (EGB) catalyzed multicomponent transformation of dimedone and aromatic aldehydes in an undivided
- Kazemi-Rad, Reyhaneh,Azizian, Javad,Kefayati, Hassan
-
p. 311 - 315
(2015/05/05)
-
- P-Sulfonic acid calix[4]arene as an efficient and reusable catalyst for the synthesis of acridinediones and xanthenes
-
p-Sulfonic acid calix[4]arene has been found to be an efficient catalyst for the synthesis of acridinediones and xanthenes under mild conditions in excellent yields. The present approach offers the advantages of simple methodology, short reaction time, an
- Baghbanian, Seyed Meysam,Khanzad, Gonja,Vahdat, Seyed Mohammad,Tashakkorian, Hamed
-
p. 9951 - 9966
(2016/01/15)
-
- ZnO nanoparticles: An efficient and reusable catalyst for one-pot synthesis of 1,8-dioxo-octahydroxanthenes
-
Abstract Zinc oxide (ZnO) nanoparticles have been used as an efficient and recyclable catalyst for one-pot synthesis of 1,8-dioxo-octahydroxanthene derivatives via condensation of aromatic aldehydes and 5,5-dimethyl-1,3- cyclohexanedione under mild reacti
- Lasemi, Zahra,Mehrasbi, Ebrahim
-
p. 2855 - 2866
(2015/04/27)
-
- Tetrabutylammonium bromide: An efficient catalyst for the synthesis of xanthenediones under solvent-free conditions
-
TBAB was found to be an effective catalyst for the synthesis of xanthenediones in good to excellent yields under solvent-free conditions. This method has many advantages such as avoiding the use of harmful solvents and catalysts, highyields and simple wor
- Ezabadi, Ali,Nazarian, Ramo,Gholami, Mina
-
p. 1559 - 1563
(2016/01/26)
-
- Extraordinary catalytic activity of a Keplerate-type giant nanoporous isopolyoxomolybdate in the synthesis of 1,8-dioxo-octahydroxanthenes and 1,8-dioxodecahydroacridines
-
(NH4)42[Mo 72 VI Mo 60 V O372(CH3COO)30(H2O)72], a Keplerate-type giant nanoporous isopolyoxomolybdate, denoted as ({Mo132}
- Nakhaei, Ahmad,Davoodnia, Abolghasem,Morsali, Ali
-
p. 7815 - 7826
(2015/02/19)
-
- Efficient synthesis of 1,8-dioxo-octahydroxanthenes catalyzed by β-cyclodextrin grafted with butyl sulfonic acid in aqueous media
-
β-Cyclodextrin was functionalized with butyl sulfonic acid to give an efficient, eco-friendly catalyst for the synthesis of 1,8-dioxo-octahydroxanthenes via the one-pot condensation of aromatic aldehydes and active methylene carbonyl compounds in aqueous
- Gong, Kai,Wang, Hualan,Wang, Shuxin,Wang, Ying,Chen, Jinghua
-
p. 1249 - 1255
(2015/09/01)
-
- Eggshell/Fe3O4 nanocomposite: Novel magnetic nanoparticles coated on porous ceramic eggshell waste as an efficient catalyst in the synthesis of 1,8-dioxo-octahydroxanthene
-
An eggshell/Fe3O4 nanocomposite was synthesized simply via an economic and novel method, using recycled eggshell biowaste as a starting material and an aqueous solution of FeSO4 as a coating agent without any additional al
- Mosaddegh, Elaheh,Hosseininasab, Fatemeh Alsadat,Hassankhani, Asadollah
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p. 106561 - 106567
(2016/01/08)
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- Nano-WO3-supported sulfonic acid: New, efficient and high reusable heterogeneous nano catalyst
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Nano-WO3-supported sulfonic acid [n-WO3-SO3H (n-WSA)] is easily prepared from the reaction of nano WO3 with chlorosulfonic acid as sulfonating agent. This new catalyst is characterized by X-ray diffraction(XRD), field emission scanning electron microscopy (FE-SEM), FT-IR spectroscopy, thermal gravimet-ric analysis (TGA), pH analysis and Hammett acidity function. Nano-WO3-supported sulfonic acid isused as an efficient and recyclable catalyst for some organic reactions such as synthesis of 1,8-dioxo-octahydroxanthene, tetrahydrobenzoxanthene and benzimidazolo quinazolinone derivatives. All of thereactions are very fast and the yields are excellent. The used catalyst was easily separated and reused for 10 runs without appreciable loss of its catalytic activity.
- Amoozadeh, Ali,Rahmani, Salman
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