- Organocatalytic combinatorial synthesis of quinazoline, quinoxaline and bis(indolyl)methanes
-
Aims and Objective: An efficient and practical procedure for the synthesis of heterocyclic compounds such as quinazolines, quinoxalines and bis(indolyl)methanes was developed using 3,5-bis(trifluoromethyl) phenyl ammonium hexafluorophosphate (BFPHP) as a novel organocatalyst. Materials and Methods: All of the obtained products are known compounds and identified by IR, 1HNMR, 13CNMR and melting points. Result: Various products were obtained in good to excellent yields under reaction conditions Conclusion: The BFPHP organocatalyst demonstrates a novel class of non-asymmetric organocatalysts, which has gained much attention in green chemistry.
- Badri, Rashid,Khaksar, Samad,Malamiri, Fatemeh,Tahanpesar, Elham
-
-
- Chemoselective synthesis of bis(indolyl)methanes using sulfonic acid-functionalized chitosan
-
Abstract: Herein, we describe the electrophilic substitution reaction of indole with aldehydes and ketone using sulphonic acid functional group containing chitosan for the synthesis of bis(indolyl)methanes. The reaction is chemoselective affording a produ
- Kumar, Amit,Patel, Chetananda,Patil, Pooja,Vyas, Shivam,Sharma, Abha
-
p. 3095 - 3104
(2019/10/19)
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- Green and efficient synthesis of aryl/alkylbis(indolyl)methanes using Expanded Perlite-PPA as a heterogeneous solid acid catalyst in aqueous media
-
Expanded Perlite-Polyphosphoric acid (EP-PPA) as a novel, efficient, recyclable and eco-benign heterogeneous catalyst has been applied for the green and rapid synthesis of aryl/alkylbis(indolyl)methanes, in water, in good to excellent yields. The catalyst
- Esmaielpour, Marzieh,Akhlaghinia, Batool,Jahanshahi, Roya
-
p. 313 - 328
(2017/03/23)
-
- Mn(pbdo)2Cl2/MCM-41 as a green catalyst in multi-component syntheses of some heterocycles
-
Mn(pbdo)2Cl2/MCM-41 as a solid acid catalyst was used as an efficient, green, reusable catalyst for an improved and rapid one-pot multi-component reaction in the synthesis of bis-(4-hydroxycoumarin), bis(indolyl)methane, and 4H-benzo
- Heravi, Majid M.,Daraie, Mansoureh
-
p. 2979 - 2988
(2016/04/05)
-
- Starch as a green source for Fe3O4@carbon core-shell nanoparticles synthesis: A support for 12-tungstophosphoric acid, synthesis, characterization, and application as an efficient catalyst
-
12-Tungstophosphoric acid (PW) immobilized on carbon-coated Fe3O4 nanoparticles (Fe3O4@C-PW) was prepared through a combination of hydrothermal and chemical co-precipitation. The intermediate carbon layer, which was produced from starch as a green material, protects the magnetic core and also improves the dispersion and catalytic activity of the nanoparticles. Characterization of this catalyst was investigated by high resolution transmission electron microscopy (HRTEM), Fourier transform infrared spectroscopy (FT-IR), vibrating sample magnetometry, and the acidic properties were studied by NH3-temperature programmed desorption and potentiometric titration. The HRTEM image showed that the catalyst had a well-defined core-shell structure with an average particle size of 50 nm. The characterization data derived from FT-IR reveal that basic structure and geometry of the Keggin anion are preserved after synthesis of Fe3O4@C-PW. The as-prepared Fe3O4@C-PW was used as a nanocatalyst for the synthesis of various bis(indolyl)methanes and β-functionalized indoles in water. The catalyst can be recovered simply using an external magnetic field and reused several times without appreciable loss of its catalytic activity.
- Rafiee, Ezzat,Khodayari, Maryam
-
p. 3523 - 3536
(2016/04/05)
-
- Synthesis and characterization of Polyindole and its catalytic performance study as a heterogeneous catalyst
-
The catalytic performance study of polyindole as a heterogeneous catalyst is reported for the synthesis of 3,3'-arylmethylene-bis-1H-Indole derivatives using various substituted aldehydes and indole under reflux reaction condition with good to excellent y
- Chhattise, Prakash,Handore, Kalpana,Horne, Amit,Mohite, Kakasaheb,Chaskar, Atul,Dallavalle, Sabrina,Chabukswar, Vasant
-
p. 467 - 475
(2016/03/16)
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- 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)
-
- Development of Br?nsted-lewis acidic solid catalytic system of 3-methyl-1-sulfonic acid imidazolium transition metal chlorides for the preparation of bis(indolyl)methanes
-
Three new heterogeneous catalysts of 3-methyl-1-sulfonic acid imidazolium transition metal chlorides [Msim][X] (where X=[FeCl4]-, [ZnCl3]-,[CuCl2]-) were synthesized containing both Lewis and Br?nsted acidic sites. These s
- Gogoi, Pinky,Dutta, Arup Kumar,Sarma, Parishmita,Borah, Ruli
-
p. 133 - 139
(2015/05/05)
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- Development of Br?nsted-Lewis acidic solid catalytic system of 3-methyl-1-sulfonic acid imidazolium transition metal chlorides for the preparation of bis(indolyl)methanes
-
Three new heterogeneous catalysts of 3-methyl-1-sulfonic acid imidazolium transition metal chlorides [Msim][X] (where X = [FeCl4]-, [ZnCl3]-, [CuCl2]-) were synthesized containing both Lewi
- Gogoi, Pinky,Dutta, Arup Kumar,Sarma, Parishmita,Borah, Ruli
-
p. 133 - 139
(2015/05/04)
-
- A domino electro-oxidative synthesis of 3,3′-bis(indolyl)methane nanoparticles
-
An effective route for electro-oxidative synthesis of 3,3′-bis(indolyl)methane nanoparticles has been described via a domino multi-component reaction between various alcohols and indole derivatives in an undivided cell under constant potential conditions in CH3CN at room temperature. The mechanistic aspect of this electro-oxidative condensation has also been studied by UV-Vis spectra and cyclic voltammograms. The nanostructure of the products has been confirmed by scanning electron microscopy. Graphical abstract: [Figure not available: see fulltext.]
- Nikoofar, Kobra,Ghanbari, Khadijeh
-
p. 2021 - 2027
(2015/11/24)
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- In situ generation of Iron(iii) dodecyl sulfate as Lewis acid-surfactant catalyst for synthesis of bis-indolyl, tris-indolyl, Di(bis-indolyl), Tri(bis-indolyl), tetra(bis-indolyl)methanes and 3-alkylated indole compounds in water
-
Iron(iii) dodecyl sulfate as Lewis acid-surfactant catalyst was prepared in situ and effectively used in the synthesis of bis(indolyl)methanes and Michael reactions of indoles with α,β-unsaturated carbonyl compounds in water. Also, this method was used for the synthesis of 1,1,3-tri-indolyl compounds, producing good to excellent yield at room temperature.
- Veisi, Hojat,Maleki, Behrooz,Eshbala, Fereshteh Hosseini,Veisi, Hamed,Masti, Ramin,Ashrafi, Samaneh Sedigh,Baghayeri, Mehdi
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p. 30683 - 30688
(2014/08/05)
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- New magnetic nanocomposites of ZrO2-Al2O 3-Fe3O4 as green solid acid catalysts in organic reactions
-
A series of magnetic solid acid nano-catalysts were designed and prepared through a facile co-precipitate approach. The original nanocomposites ZrO 2-Al2O3-Fe3O4 were characterized by means of ICP-AES
- Wang, Anqi,Liu, Xiang,Su, Zhongxing,Jing, Huanwang
-
-
- Synthesis of pharmacologically active bis(indolyl) and tris(indolyl) derivatives using chlorotrimethylsilane
-
Chlorotrimethylsilane is found to be a comparatively fast and efficient catalyst for carrying out electrophilic substitution reactions of indoles with various aldehydes/ketones/triethylorthoformate, yielding excellent amount of bis(indolyl)methanes/tris(indolyl)methanes. The merits of this protocol are avoidance of any external energy source, minimal reaction time, simple and easy procedure and high yield under solvent free room temperature condition. The versatility of this method has been tested with various aldehydes/ketones and received satisfactory results. A simple, fast, efficient, cheap and versatile method for the synthesis of bis(indolyl)methanes and tris(indolyl)methanes under solvent free room temperature condition using chlorotrimethylsilane as a catalyst has been developed. Thus, we have demonstrated the utility of TMSCl not only as a protecting group but also as catalyst in electrophilic substitution reactions. Copyright
- Singh, Nongthombam G.,Kathing, Chingrishon,Rani, Jims W. S.,Nongkhlaw, Rishan L.
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p. 442 - 446
(2014/05/06)
-
- A practical synthesis of bis(indolyl)methanes catalyzed by BF 3·Et2O
-
Practical BF3·Et2O catalyzed reactions between indoles and a series of carbonyl compounds at room temperature are described, which afford bis(indolyl)methanes with isolated yields up to 96%.
- Xu, Xia-Fei,Xiong, Yan,Ling, Xue-Ge,Xie, Xi-Mi,Yuan, Jie,Zhang, Shu-Ting,Song, Zhong-Rong
-
supporting information
p. 406 - 410
(2014/03/21)
-
- Succinimide-N-sulfonic acid catalyzed synthesis of bis(indolyl)methane and coumarin derivatives under mild conditions
-
A mild and simple procedure is described for the synthesis of bis(indolyl)methane and coumarin derivatives using succinimide-N-sulfonic acid as an efficient, cheap, and reusable catalyst under mild conditions.
- Shirini, Farhad,Khaligh, Nader Ghaffari
-
p. 1890 - 1896
(2013/11/19)
-
- P-sulfonic acid calix[4]arene: An efficient reusable organocatalyst for the synthesis of bis(indolyl)methanes derivatives in water and under solvent-free conditions
-
In this work, a green, simple and highly efficient procedure for the synthesis of bis(indolyl)methanes is described. The condensation of indoles catalyzed by p-sulfonic acid calix[4]arene in water and under solvent-free conditions afford the title compoun
- Baghbanian, Seyed Meysam,Babajani, Yaser,Tashakorian, Hamed,Khaksar, Samad,Farhang, Maryam
-
p. 129 - 134
(2013/05/08)
-
- Rice-husk-supported FeCl3 nano-particles: Introduction of a mild, efficient and reusable catalyst for some of the multi-component reactions
-
Rice-husk-supported FeCl3 nano-particles (FeCl3-RiH) were prepared and used as an environmentally friendly catalyst in the synthesis of b-amino carbonyl compounds, 1,8- dioxo-octahydro xanthenes, and bis-indolyl methanes from simple and readily available precursor molecules.
- Shirini, Farhad,Akbari-Dadamahaleh, Somayeh,Mohammad-Khah, Ali
-
p. 945 - 955
(2013/10/22)
-
- Sulfonated rice husk ash (RHA-SO3H) as a highly efficient and reusable catalyst for the synthesis of some bis-heterocyclic compounds
-
Sulfonated rice husk ash (RHA-SO3H), a newly reported solid acid catalyst, was efficiently used for the synthesis of 4,4′-(arylmethylene)- bis-(3-methyl-1-phenyl-1H-pyrazol-5-ols), 3,3′-(arylmethylene)-bis-(4- hydroxycoumarins) and bis(indolyl)
- Seddighi, Mohadeseh,Shirini, Farhad,Mamaghani, Manouchehr
-
p. 24046 - 24053
(2013/11/19)
-
- Magnetic inorganic-organic hybrid nanomaterial for the catalytic preparation of bis(indolyl)arylmethanes under solvent-free conditions: Preparation and characterization of H5PW10V 2O40/pyridino-Fe3O4 nanoparticles
-
Magnetically separable inorganic-organic hybrid material H 5PW10V2O40/pyridino-Fe 3O4 (HPA/TPI-Fe3O4) nanoparticles provide an efficient and economic route for the synthesis of substituted bis(indolyl)methanes by the electrophilic substitution of indole with various aldehydes and ketones under solvent-free conditions with excellent yields in 5PW10V2O40 onto Fe3O 4 nanoparticles via the use of N-[3-(triethoxysilyl)propyl] isonicotinamide (TPI) linker. High catalytic activity and ease of recovery using an external magnetic field are additional eco-friendly attributes of this new catalytic system. The catalyst was recycled at least eight times without significant loss of catalytic activity. Characterization techniques such as XRD, SEM, and FTIR for HPA/TPI-Fe3O4 verified that the Keggin structure of tungsto-vanadophosphoric acid on the surface of pyridine modified Fe3O4 nanoparticles is retained.
- Tayebee, Reza,Amini, Mostafa M.,Abdollahi, Nasrin,Aliakbari, Azam,Rabiei, Sima,Ramshini, Hassan
-
-
- Nano n-propylsulfonated γ-Fe2O3 (NPS-γ-Fe2O3) as a magnetically recyclable heterogeneous catalyst for the efficient synthesis of 2-indolyl-1-nitroalkanes and bis(indolyl)methanes
-
Nano n-propylsulfonated γ-Fe2O3 (NPS-γ-Fe2O3) was used as a new magnetically recyclable heterogeneous catalyst for the efficient synthesis of indole derivatives, such as 2-indolyl-1-nitroalkanes and bis(indolyl)
- Sobhani, Sara,Jahanshahi, Roya
-
p. 1009 - 1015
(2013/06/27)
-
- One-pot tandem reactions for direct conversion of thiols and disulfides to sulfonic esters, alcohols to bis(indolyl)methanes and synthesis of pyrroles catalyzed by N-chloro reagents
-
A convenient synthesis of sulfonic esters from thiols and disulfides has been described. In situ preparation of sulfonyl chlorides from thiols is accomplished by oxidation with Chloramin-T, tetra-butylammonium chloride (t-Bu4NCl) and water. The sulfonyl chlorides are then further allowed to react with phenol derivatives in the same reaction vessel. Also, a facile synthesis of bis(indolyl)methanes from alcohols using TCCA/KBr/wet-SiO2, and N-substituted pyrroles by reaction of hexane-2,5-dione with primary amines has been accomplished under mild condition with excellent yields.
- Veisi, Hojat,Ataee, Meral,Fatolahi, Leila,Lotfi, Shahram
-
p. 111 - 117
(2013/07/26)
-
- Synthesis of bis(indolyl)methanes using silica gel as an efficient and recyclable surface
-
Here we describe a simple, clean, and efficient solvent-free protocol for the synthesis of bis(indolyl)methanes promoted by silica gel. The products were obtained in good to excellent yields through the reaction of indoles with cyclohexanone and a range o
- Mendes, Samuel R.,Thurow, Samuel,Fortes, Margiani P.,Penteado, Filipe,Lenard?o, Eder J.,Alves, Diego,Perin, Gelson,Jacob, Raquel G.
-
p. 5402 - 5406
(2012/10/29)
-
- Cobalt(II) sulfamate as an efficient catalyst for synthesis of bis(1H-Indol-3-yl)methanes
-
The catalytic activity of eleven metal sulfamates for synthesis of bis(1H-indol-3-yl)methanes was compared under the same condition, cobalt(II) sulfamate proved to be the best. Cobalt sulfamate catalyzing the electrophilic substitution reactions of indole
- Zhang, Yanan,Liu, Qing
-
experimental part
p. 5302 - 5304
(2012/09/21)
-
- Micelle promoted synthesis of bis-(indolyl)methanes
-
Abstract: Bis-(indolyl)methanes were synthesized by a simple, clean and highly efficient Tween-20 micelle promoted reaction of indole with aldehydes in water by the single step reaction. The absence of electrical double layer in the nonionic surfactant mi
- Kumar, Krishnammagari S.,Reddy, Chinnapareddy B.,Krishna, Balam S.,Srinivasulu, Kambam,Reddy, Cirandur S.
-
experimental part
p. 294 - 299
(2012/08/08)
-
- PEG-SO3H as a catalyst for the preparation of bis-indolyl and tris-indolyl methanes in aqueous media
-
A facile, efficient, and green synthesis of bis-indolyl and tris-indolyl methanes has been developed by one-pot condensation of indole with structurally diverse aldehydes and ketones in the presence of poly(ethylene glycol)-bound sulfonic acid as catalyst
- Rani, V. Jhansi,Vani, K. Veena,Rao, C. Venkata
-
experimental part
p. 2048 - 2057
(2012/06/01)
-
- An original route to newly-functionalized indoles and carbazoles starting from the ring-opening of nitrothiophenes
-
The multifaceted behavior of nitrobutadienes deriving from the initial ring-opening of nitrothiophenes finds a further clear-cut example in their Michael-type acceptor reactivity towards indole. Thus, depending on the starting diene, either newly-function
- Bianchi, Lara,Giorgi, Gianluca,MacCagno, Massimo,Petrillo, Giovanni,Scapolla, Carlo,Tavani, Cinzia
-
experimental part
p. 752 - 757
(2012/03/09)
-
- Efficient and solvent-free synthesis of bis-indolylmethanes using silica gel supported aluminium chloride as a reusable catalyst
-
Stable and non-hygroscopic silica gel supported aluminium chloride (SiO2-AlCl3), which is prepared easily from cheap and commercially available compounds was found to be an environmentally friendly heterogeneous catalyst for the cond
- Boroujeni, Kaveh Parvanak,Parvanak, Kamran
-
experimental part
p. 939 - 942
(2012/01/11)
-
- PEG-SO3H as a new, highly efficient and homogeneous polymeric catalyst for the synthesis of Bis(indolyl)methanes and 4, 4'-(Arylmethylene)- bis(3-methyl-1-phenyl-1hpyrazol-5-ol)s in water
-
In this work, a green, simple and highly efficient procedure for the synthesis of bis(indolyl)methanes and 4, 4'-(arylmethylene)-bis(3-methyl-1- phenyl-1H-pyrazol-5-ol)s [as an important class of bis(pyrazolyl)methanes] is described. The condensation of i
- Hasaninejad,Shekouhy,Zare,Hoseini Ghattali,Golzar
-
experimental part
p. 411 - 423
(2012/06/18)
-
- Melamine-formaldehyde resin supported H+ a mild and inexpensive reagent for synthesis of coumarins under mild conditions
-
Melamine-formaldehyde resin supported H+ is used as an efficient catalyst in the Pechmann condensation reaction of phenols with β-ketoesters, in solvent-free media leading to the formation of coumarin derivatives using conventional heating and
- Rezaei, Ramin,Dorosty, Leila,Rajabzadeh, Maryam,Khalifeh, Reza
-
experimental part
p. 1313 - 1316
(2012/01/06)
-
- Surfactant-assisted synthesis of bis(indolyl)methanes in water
-
An environmentally friendly synthesis method for bis(indolyl)methanes has been developed in the presence of sodium lauryl ether sulfate (SLES), electrophilic substitution reactions of indoles with aldehydes were accomplished in water as solvent at room te
- Kolvari, Eskandar,Zolfigol, Mohammad Ali,Banary, Hoda
-
experimental part
p. 1305 - 1308
(2012/01/30)
-
- Poly(N,N'-dichloro-N-ethyl-benzene-1, 3-disulfonamide) and N,N,N',N'-Tetrachlorobenzene-1,3-disulfonamide as novel catalytic reagents for synthesis of Bis-indolyl, Tris-indolyl, Di(bis-indolyl), Tri(bis-indolyl) and Tetra(bis-indolyl) methanes under solid-state, solvent and water conditions
-
Easy and rapid preparation of bis-indolyl, tris-indolyl, di(bis-indolyl), tri(bis-indolyl) and tetra(bis-indolyl) methanes from indole with various aldehydes and ketones using poly (N,N'-dichloro-N-ethyl-benzene-1,3- disulfonamide) [PCBS] and N,N,N',N'-tetrachlorobenzene-1,3-disulfonamide [TCBDA] as novel catalysts under various conditions are here described.
- Ghorbani-Vaghei, Ramin,Veisi, Hojat
-
experimental part
p. 193 - 201
(2010/09/03)
-
- Synthesis of diindolylmethanes (DIMs) catalyzed by silicotungstic acid by grinding method
-
The synthesis of diindolylmethanes (DIMs) via the condensation of indole and aromatic aldehydes catalyzed by silicotungstic acid was carried out in 68%~98% yields at room temperature within 1~5 min by grinding. This method provides several advantages such
- Li, Ji-Tai,Sun, Shao-Feng
-
experimental part
p. 922 - 926
(2011/12/01)
-
- Trichloroisocyanuric acid-catalyzed reaction of indoles: An expeditious synthesis of bis-indolyl, tris-indolyl, di(bis-indolyl), tri(bis-indolyl), and tetra(bis-indolyl)methane under solid-state conditions
-
Trichloroisocyanuric acid is found to be an efficient catalyst for the electrophilic substitution reaction of indole with aldehydes/ketones to afford the corresponding bis-indolyl, tris-indolyl, di(bis-indolyl), tri(bis-indolyl), and tetra(bis-indolyl)methanes under solid-state conditions by pulverization-activation method at room temperature with excellent yields. The remarkable features of this new procedure are high conversions, shorter reaction times, cleaner reaction profiles, and simple experimental and work-up procedures.
- Veisi, Hojat,Gholbedaghi, Reza,Malakootikhah, Javad,Sedrpoushan, Alireza,Maleki, Behrooz,Kordestani, Davood
-
experimental part
p. 1398 - 1405
(2011/03/21)
-
- Efficient synthesis of bis (indolyl) methanes catalyzed by (PhCH2PPh3)+Br3- under solvent-free conditions
-
Benzyltriphenylphosphonium tribromide (BTPTB) has been applied as an efficient catalyst for the preparation of bis (indolyl) methanes (BIMs) via electrophilic substitution of indoles with aldehydes in the absence of solvent.
- Shirini, Farhad,Langroodi, Mohaddeseh Safarpoor,Abedini, Masoumeh
-
experimental part
p. 1342 - 1345
(2011/10/08)
-
- Tetrabutylammonium tribromide as efficient catalyst in the synthesis of bis(indolyl)methanes
-
An efficient procedure has been developed for the synthesis of bis(indolyl)methane derivatives by condensation of aldehydes with indole in the presence of tetrabutylammonium tribromide as catalyst.
- Kundu,Islam,Hajra,Majee
-
scheme or table
p. 126 - 128
(2010/06/19)
-
- Highly efficient method for synthesis of bis(indolyl)methanes catalyzed by FeCl3-based ionic liquid
-
Asimple and highly efficient green protocol for synthesis of bis(indolyl)methanes was carried out by the reaction of indole with aldehydes and ketones in the presence of FeCl3-based ionic liquid. These liquids serve as efficient media as well a
- Veisi, Hojat,Hemmati, Saba,Veisi, Hamed
-
experimental part
p. 240 - 245
(2009/12/03)
-
- Bulk and supported tungstophosphoric acid as friendly, efficient, recyclable catalysts for the synthesis of bis-indolylmethanes under solvent-free conditions
-
The treatment of indole with structurally diverse aldehydes in the presence of catalytic amount of inorganic-supported polyoxometalates, heterogeneous, reusable and efficient catalysts at room temperature gave the corresponding bisindolylmethanes in excel
- Aliyan, Hamid,Fazaeli, Razieh,Naghash, Hamid Javaherian,Massah, Ahmad Reza,Momeni, Ahmad Reza,Iravani, Zohreh
-
experimental part
p. 325 - 331
(2010/08/05)
-
- An eco-friendly procedure for the efficient synthesis of bis(indolyl)methanes in aqueous media
-
A new, convenient and high yielding procedure for the preparation of bis(indolyl)methanes in water by electrophilic substitution reaction of indoles with different carbonyl compounds in the presence of a catalytic amount of [Cu(3,4-tmtppa)](MeSO4/su
- Sobhani, Sara,Safaei, Elham,Hasaninejad, Ali-Reza,Rezazadeh, Soodabeh
-
experimental part
p. 3027 - 3031
(2009/12/01)
-
- Antimony(III) sulfate catalyzed condensation reaction of indoles with carbonyl compounds
-
Antimony sulfate was found to be on effective catalyst for the condensation reaction of indoles with carbonyl compounds at room temperature. This catalyst is inexpensive, easily available and it was also found that this catalyst could be recovered quantitatively and reused without much loss of catalytic activity.
- Srinivasa, Aswathanarayana,Varma, Putta Prabhakar,Hulikal, Vijaykumar,Mahadevan, Kittappa M.
-
p. 111 - 115
(2008/09/21)
-
- Efficient synthesis of bis- and tris-indolylalkanes catalyzed by a Bronsted acid-surfactant catalyst in water
-
A simple and efficient synthesis of bis- and tris-indolylalkanes from carbonyls (aldehydes/ketones) and indoles with excellent yields in the presence of dodecylsulphonic acid (DSA) in water at room temperature is described. The catalyst is also applicable
- Hazarika, Parasa,Sharma, Saikat Das,Konwar, Dilip
-
p. 2870 - 2880
(2008/12/22)
-
- Synthesis of 3-substituted indoles promoted by pulverization-activation method catalyzed by Bi(NO3)3·5H2O
-
(Chemical Equation Presented) A new, facile, efficient, "green" and chemoselective procedure for the synthesis of indole derivatives has been developed with pulverization-activation method catalyzed by Bi(NO 3)3·5H2O (PAMC- Bi(NO3) 3·5H2O) through grinding of indoles with aldehydes or Michael acceptors in the presence of catalytic amounts of Bi(NO 3)3·5H2O under solvent-free conditions.
- Khodaei, Mohammad M.,Mohammadpoor-Baltork, Iraj,Memarian, Hamid R.,Khosropour, Ahmad R.,Nikoofar, Kobra,Ghanbary, Parvin
-
p. 377 - 381
(2008/09/20)
-
- Catalyzed Reaction for Forming Indole-Based Compounds and Their Application in Anticancer Agents
-
The present invention discloses a method for forming indole-based compounds, wherein the method comprises a reaction of α,β-unsaturated ketone or aldehyde with indole or its derivative in the presence of at least one kind of Lewis acid. The Lewis acid com
- -
-
Page/Page column 4
(2008/12/06)
-
- Diammonium hydrogen phosphate as an efficient and inexpensive catalyst for the synthesis of bis(indolyl)methanes under solvent-free conditions
-
Bis(indolyl)methanes were synthesized by the reaction of indole derivatives and aromatic and aliphatic aldehydes in the presence of diammonium hydrogen phosphate as a solid catalyst under solvent-free conditions. This methodology offers significant improv
- Dabiri, Minoo,Salehi, Peyman,Baghbanzadeh, Mostafa,Vakilzadeh, Yasamin,Kiani, Shadi
-
p. 595 - 597
(2008/02/03)
-
- Copper nitrate trihydrate catalyzed efficient synthesis of bis(indolyl)methanes in acetonitrile at room temperature
-
(Chemical Equation Presented) A catalytic amount of easily available and inexpensive Cu(NO3)3.3H2O (10 mol%) enables electrophilic substitution reaction of indole with structurally divergent aldehydes in acetonitrile to af
- Nasreen, Aayesha,Varala, Ravi,Adapa, Srinivas R.
-
p. 983 - 987
(2008/04/05)
-
- Green protocol for synthesis of bis-indolylmethanes and bis-indolylglycoconjugates in the presence of iron(III) fluoride as a heterogeneous, reusable, and eco-friendly catalyst
-
An efficient method for the preparation of bis-indolylmethanes and bis-indolylglycoconjugates from carbonyl compounds with indoles in the presence of a catalytic amount of iron(iii) fluoride under solvent-free conditions is reported. The desired products
- Kamble, Vinod T.,Bandgar, Babasaheb P.,Suryawanshi, Satish B.,Bavikar, Sudhir N.
-
p. 837 - 840
(2007/10/03)
-
- Rare earth perfluorooctanoate [RE(PFO)3]-catalyzed condensations of indole with carbonyl compounds
-
New rare earth perfluorooctanoates [RE(PFO)3] were developed and applied to the condensation reactions of indole with carbonyl compounds at ambient temperature. It was found that these catalysts could be completely recovered and reused without
- Wang, Limin,Han, Jianwei,Tian, He,Sheng, Jia,Fan, Zhaoyu,Tang, Xiaoping
-
p. 337 - 339
(2007/10/03)
-
- CuBr2-catalyzed synthesis of bis(indolyl)methanes
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Copper(II) bromide is found to be an efficient catalyst for the electrophilic substitution reaction of indole with aldehydes to afford the corresponding bis(indolyl)-methanes in good yields. Copyright Taylor & Francis, Inc. 1997-2004.
- Mo, Li-Ping,Ma, Zi-Chuan,Zhang, Zhan-Hui
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p. 1997 - 2004
(2007/10/03)
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- Organic reactions in aqueous media: InF3 catalysed synthesis of bis(indolyl)methanes in water under mild conditions
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InF3 catalysed electrophilic substitution reactions of indoles with aldehydes and ketones are carried out in water to furnish the corresponding bis(indolyl)methanes in high yield under mild conditions.
- Bandgar,Shaikh
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- Hexamethylenetetraamine-bromine catalyzed rapid and efficient synthesis of bis(indolyl)methanes
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Highly rapid and convenient syntheses of bis(indolyl)methanes in excellent yields were carried out using the inexpensive and easily available catalyst, hexamethylenetetraamine-bromine (HMTAB). Mild reaction conditions, short reaction times, and excellent yields are important features of this method. Springer-Verlag 2004.
- Bandgar, Babasaheb P.,Bettigeri, Sampada V.,Joshi, Neeta S.
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p. 1265 - 1273
(2007/10/03)
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- Molecular iodine-catalyzed efficient and highly rapid synthesis of bis(indolyl)methanes under mild conditions
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Highly rapid and efficient electrophilic substitution reactions of indoles with various aldehydes and ketones were carried out using I2 in CH3CN to afford the corresponding bis(indolyl)methanes in excellent yields.
- Bandgar,Shaikh
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p. 1959 - 1961
(2007/10/03)
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