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Efficient and rapid route to thioamides via modified Willgerodt-Kindler reaction of quinaldine and picolines under microwave irradiation
, Article Journal of Sulfur Chemistry ; Volume 25, Issue 6 , 2004 , Pages 407-412 ; 17415993 (ISSN) ; Zali Boinee, H ; Taheri, S ; Sharif University of Technology
2004
Abstract
Various thioamides, especially thiobenzanilides and thioacetomorpholides, bearing a heterocycle ring were efficiently prepared by a modified Willgerodt-Kindler reaction of quinaldine and α- and γ-picoline with anilines and morpholine in the presence of sulfur, and a catalytic amount of DABCO under microwave irradiation
Microwave-Assisted conversion of nitriles to thioamides in solvent-free condition
, Article Synthetic Communications ; Volume 33, Issue 24 , 2003 , Pages 4279-4284 ; 00397911 (ISSN) ; Hojabri, L ; Dohendou, M ; Sharif University of Technology
2003
Abstract
Nitriles are efficiently transformed to thiomorpholides via the Willgerodt-Kindler reaction under microwave irradiation in solvent-free conditions
Microwave-induced Cannizzaro reaction over neutral γ-alumina as a polymeric catalyst [electronic resource]
, Article Reactive and Functional Polymers ; 01/2002; 51(1):49-53 ; Soleimanzadeh, B ; Marandi, G. B
Abstract
γ-Alumina is used to catalyze the Cannizzaro reaction in the absence of any base under microwave irradiation in high yields. In the case of terephthalaldehyde the reaction is carried out with high selectivity
Microwave assisted preparation of flavylium salts with perchloric acid impregnated on silica gel under solvent-free conditions
, Article Letters in Organic Chemistry ; Vol. 11, issue. 10 , 2014 , pp. 713-718 ; ISSN: 15701786 ; Foroushani, B. K ; Ghonouei, N ; Kalahroodi, E. L ; Sharif University of Technology
Abstract
Perchloric acid immobilized on silica gel (SiO2-HClO4) has been utilized as a mild and cheap reagent for onepot preparation of different varieties of flavylium salts via tandem reaction of different acetophenones with Salicylaldehydes under solvent-free conditions. Different reaction conditions such as conventional heating and microwave irradiation have been investigated. The corresponding flavylium salts have been prepared in high yields. The procedure is milder and more convenient than the known procedures
Synthesis of tetrahydrothiopyrano[2,3-b]indole [60]fullerene derivatives via hetero-diels–alder reaction of c60 and α,β-unsaturated indole-2-thiones
, Article Journal of Heterocyclic Chemistry ; Volume 54, Issue 2 , 2017 , Pages 911-915 ; 0022152X (ISSN) ; Ghanbari, B ; Behzadi, M ; Baghersad, M. H ; Sharif University of Technology
HeteroCorporation
2017
Abstract
Hetero-Diels–Alder reactions of [60]fullerene with α,β-unsaturated thio-oxindoles (3a, 3b, 3c), prepared from thio-oxindole 1 and heteroaromatic aldehydes (2a, 2b, 2c), to generate tetrahydrothiopyrano[2,3-b]indole [60]fullerene cycloadducts (5a, 5b, 5c) under thermal or microwave irradiation were described. The yields were improved, and the reaction time was decreased by conducting the reaction under microwave irradiation. © 2016 Wiley Periodicals, Inc
Red mud catalyzed one-pot synthesis of nitriles from aldehydes and hydroxylamine hydrochloride under microwave irradiation
, Article Arkivoc ; Volume 2007, Issue 15 , 2007 , Pages 162-170 ; 1551-7012 (ISSN) ; Azimi, N ; Mohammed Vali, M ; Eftekhari Sis, B ; Hashemi, M. M ; Baniasadi, M. H ; Teimouri, F ; Sharif University of Technology
Arkat
2007
Abstract
Red mud (RM) which emerges as a by-product from the alumina producing process has been used as an efficient catalyst for one-pot direct synthesis of nitrile compounds from aldehydes and hydroxylamine hydrochloride under microwave irradiation. ©ARKAT USA, Inc
Solvent-free synthesis of tri-substituted thiophenes via thio-Claisen rearrangement under microwave irradiation: A convenient route to novel tertiary 2-thienyl amines
, Article Journal of Sulfur Chemistry ; Volume 26, Issue 4-5 , 2005 , Pages 331-335 ; 17415993 (ISSN) ; Zali Boeini, H ; Zargarani, D ; Sharif University of Technology
2005
Abstract
A solvent-free, solid-supported, and microwave-assisted thio-Claisen rearrangement of S-propargylated thioamides having an activated α-methylene group has been developed. The methodology could be used successfully for the synthesis of tri-substituted thiophenes and sulfur containing triarylamines. The reaction takes place in short time and in good isolated yield. © 2005 Taylor & Francis
Rapid and selective acetalization of aldehydes using anhydrous copper sulfate supported on silica gel (CuSO4/SiO2) under microwave irradiation in solvent-free conditions
, Article Letters in Organic Chemistry ; Volume 2, Issue 2 , 2005 , Pages 151-155 ; 15701786 (ISSN) ; Oskoui, A. A ; Boinee, H. Z ; Sharif University of Technology
2005
Abstract
CuSO4/SiO2 is found to be an efficient and selective medium for the acetalization of aldehydes in the presence of ketones in solvent-free conditions under microwave irradiation. © 2005 Bentham Science Publishers Ltd
Microwave-assisted methylation of carboxylic acids and phenolic compounds with dimethyl-carbonate under solvent-free condition
, Article Synthetic Communications ; Volume 34, Issue 22 , 2004 , Pages 4179-4188 ; 00397911 (ISSN) ; Saidi, M. R ; Sharif University of Technology
2004
Abstract
Phenolic compounds and carboxylic acids are methylated with dimethyl carbonate in the presence of a catalytic amount of BF3· OEt2, DBU, or KOH, in good to excellent yields under microwave irradiation and solvent-free conditions
Solid supported microwave-assisted Beckmann rearrangement of ketoximes in dry media
, Article Synthetic Communications ; Volume 34, Issue 11 , 2004 , Pages 2071-2075 ; 00397911 (ISSN) ; Rastegar Rad, A. A ; Zali-Boinee, H ; Sharif University of Technology
2004
Abstract
An AlCl3-ZnCl2 mixture supported on silica gel is found to be a new efficient medium for the Beckmann rearrangement in solvent-free conditions under microwave irradiation. The yields are good to excellent
Desulfurization of Tabas coal with microwave irradiation/peroxyacetic acid washing at 25, 55 and 85 °C
, Article Fuel ; Volume 83, Issue 7-8 , 2004 , Pages 943-949 ; 00162361 (ISSN) ; Rezai, B ; Vossoughi, M ; Osanloo, M ; Sharif University of Technology
2004
Abstract
Tabas coal sample from Iran was desulfurized with combination of microwave irradiation and peroxyacetic acid washing in a batch reactor. The effect of irradiation time and power, peroxyacetic acid reaction time and temperature and particle size on reduction of sulfur was investigated. For microwaved/acid washed samples, depending on desulfurization conditions, the reduction in pyritic, organic and total sulfur ranged from 26 to 91, 2.6 to 38.4 and 17 to 65%, respectively. Microwave irradiation had positive effect on desulfurization with peroxyacetic acid. For <300 μm size fraction, after irradiation, the reduction enhanced from 49.9 to 86.6% in pyritic sulfur, 23.8 to 35% in organic sulfur...
A novel one-pot synthesis of tetrasubstituted imidazoles under solvent-free conditions and microwave irradiation
, Article Tetrahedron Letters ; Volume 44, Issue 8 , 2003 , Pages 1709-1711 ; 00404039 (ISSN) ; Hashemi, M. M ; Akhbari, M ; Sharif University of Technology
2003
Abstract
The one-pot, three-component condensation of benzil, benzonitrile derivatives and primary amines on the surface of silica gel under solvent-free conditions and microwave irradiation provided tetrasubstituted imidazoles in high yields. © 2003 Elsevier Science Ltd. All rights reserved
A new protocol for O-methylation of phenolic compounds with trimethyl phosphite or trimethyl phosphate under solvent-free condition and microwave irradiation
, Article Phosphorus, Sulfur and Silicon and the Related Elements ; Volume 178, Issue 11 , 2003 , Pages 2343-2348 ; 10426507 (ISSN) ; Rajabi, F ; Sharif University of Technology
Taylor and Francis Ltd
2003
Abstract
A simple method for the preparation of industrially important alkyl aryl ethers is reported. Several phenolic compounds such as phenols, naphthols, and hydroxy coumarins were O-methylated with trimethyl phosphite or trimethyl phosphate under microwave irradiation and solvent-free condition in almost quantitative yields. Reaction of 2-naphthol with trimethyl phosphate gave mixture of 2-methoxynaphthalene and 1-methyl-2-methoxynaphthalene while the reaction with trimethyl phosphite gave mostly 2-methoxynaphthalene. This method is highly efficient for the methylating of phenolic compounds with very easy experimental procedure and environmental friendly conditions
Microwave-induced Cannizzaro reaction over neutral γ-alumina as a polymeric catalyst
, Article Reactive and Functional Polymers ; Volume 51, Issue 1 , 2002 , Pages 49-53 ; 13815148 (ISSN) ; Soleimanzadeh, B ; Marandi, G. B ; Sharif University of Technology
2002
Abstract
Microwave induced Cannizzaro reaction, which was performed in presence of neutral γ-alumina as a polymeric catalyst, was discussed. Cannizzaro reaction was carried out on alumina surface and other unknown products were also obtained. Solvent extraction method was utilized to isolate mild and selective benzyl alcohol and carboxylic acids
Microwave assisted reduction of Schiff bases by triethylammonium formate/formic acid system
, Article Journal of Chemical Research - Part S ; Issue 12 , 2001 , Pages 525-527 ; 03082342 (ISSN) ; Khakshoor, O ; Ghaffarzadeh, M ; Sharif University of Technology
2001
Abstract
Aryl schiff bases were efficiently reduced to the corresponding secondry amines by triethylammonium formate/formic acid system under microwave irradiation in solvent-free condition
Microwave-assisted one-pot synthesis of symmetrical 4H-pyran-4-ones
, Article Journal of the Brazilian Chemical Society ; Volume 18, Issue 5 , 2007 , Pages 1024-1027 ; 01035053 (ISSN) ; Bardajee, G. R ; Ismaili, H ; Sharif University of Technology
Sociedade Brasileira de Quimica
2007
Abstract
We report a simple, fast, efficient and benign procedure for solvent-free microwave-assisted one-pot synthesis of symmetrical 4H-pyran-4-ones in the presence of polyphosphoric acid or diphosphorous pentoxide. Various 4H-pyran-4-ones were prepared using this very simple and fast green protocol. ©2007 Sociedade Brasileira de Química
A mild and efficient oxidation of benzylic alcohols without solvent using iodic acid supported on wet montmorillonite K10 or silica gel under microwave irradiation
, Article Acta Chimica Slovenica ; Volume 52, Issue 1 , 2005 , Pages 86-87 ; 13180207 (ISSN) ; Rahimi, A ; Karimi Jaberi, Z ; Ahmadibeni, Y ; Sharif University of Technology
2005
Abstract
Iodic acid supported on wet silica gel and K10 clay are used for the efficient oxidation of benzylic alcohols under microwave irradiation and solvent free condition
Microwave-promoted pseudo-thia-Fries rearrangement of aryl benzylsulfonates; highly reactive benzyl cation generation
, Article Journal of Sulfur Chemistry ; Volume 25, Issue 2-3 , 2004 , Pages 125-130 ; 17415993 (ISSN) ; Hoor, A. A ; Dekamin, M. G ; Sharif University of Technology
2004
Abstract
Aryl benzylsulfonates undergo so-called pseudo-thia-Fries rearrangement under microwave irradiation. Benzylated phenolic compounds have been obtained with the loss of 'SO2' from the starting materials
Synthesis of 1,4-disubstituted 1,2,3-triazoles from aromatic α-bromoketones, sodium azide and terminal acetylenes via Cu/Cu(OTf)2-catalyzed click reaction under microwave irradiation
, Article Zeitschrift fur Naturforschung - Section C Journal of Biosciences ; Volume 68, Issue 4 , Apr , 2013 , Pages 391-396 ; 09395075 (ISSN) ; Oskooie, H. A ; Beheshtiha, Y. S ; Heravi, M. M ; Matloubi Moghaddam, F ; Koushki Foroushani, B ; Sharif University of Technology
2013
Abstract
Reaction of aromatic α-bromoketones, sodium azide and aromatic or aliphatic terminal acetylenes in the presence of Cu/Cu(OTf)2following the classical method (aqueous acetonitrile at room temperature) and under microwave irradiation (H2O at 85 °C) leads to 1,4-disubstituted 1,2,3-triazoles as the final products after simple filtration
Zirconium(IV) oxide chloride and anhydrous copper(II) sulfate mediated synthesis of 2-substituted benzothiazoles
, Article Heteroatom Chemistry ; Volume 17, Issue 2 , 2006 , Pages 136-141 ; 10427163 (ISSN) ; Ismaili, H ; Rezanejade Bardajee, G ; Sharif University of Technology
2006
Abstract
A simple, fast and efficient benign procedure has been developed for one-pot synthesis of 2-substituted benzothiazoles in the presence of zirconium(IV) oxide chloride octahydrate (ZrOCl2·8H 2O) and anhydrous copper(II) sulfate. The reaction of 2-aminothiophenol with aldehydes and anhydrides was carried out efficiently in solvent-free conditions with or without microwave irradiation, and adducts were produced in good to excellent yields. © 2006 Wiley Periodicals, Inc