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Total 140 records

    Chiral recognition by proton transfer reactions with optically active amines and alcohols

    , Article Chemical Communications ; Issue 23 , 2004 , Pages 2740-2741 ; 13597345 (ISSN) Bagheri, H ; Chen, H ; Cooks, R. G ; Sharif University of Technology
    Royal Society of Chemistry  2004
    Abstract
    A simple, rapid tandem mass spectrometric method for recognition of chiral molecules by proton transfer reactions with chiral sec-butylamines and sec-butanols is reported  

    A new protocol for the preparation of aminals from aromatic aldehydes and their facile conversion to phosphonates

    , Article Phosphorus, Sulfur and Silicon and the Related Elements ; Volume 179, Issue 1 , 2004 , Pages 89-96 ; 10426507 (ISSN) Karimi Dezfuli, M ; Saidi, M. R ; Sharif University of Technology
    2004
    Abstract
    A new and fast method for the preparation of aminals is reported from the reaction of aromatic aldehydes and secondary amines in the presence of potassium carbonate in high yields. The aminal can be converted to the corresponding iminum salt in reaction with acetyl chloride very easily and in very short time with high yield. Addition of trialkylphosphite, as one possible nucleophile, to the prepared iminium salt produces the α-amino phosphonate in very high yield  

    A simple one-pot three-component reaction for preparation of secondary amines and amino esters mediated by lithium perchlorate

    , Article Tetrahedron ; Volume 57, Issue 31 , 2001 , Pages 6829-6832 ; 00404020 (ISSN) Saidi, M. R ; Azizi, N ; Zali Boinee, H ; Sharif University of Technology
    2001
    Abstract
    The one-pot synthesis of several secondary amines and secondary amino esters are reported. Treatment of aldehydes (aliphatic or aromatic) with (trimethylsilyl)alkylamines, in the presence of 5 M lithium perchlorate in diethyl ether gives intermediate imines. Reaction of these intermediate imines with different nucleophiles and functionalized organozinc reagents, BrZnCH2COOR, produce a variety of secondary amines and N-alkyl- or N-arylamino esters in good yields. © 2001 Elsevier Science Ltd. All rights reserved  

    One-pot reductive amination of aldehydes by the dihydropyridine in water

    , Article Scientia Iranica ; Volume 19, Issue 6 , December , 2012 , Pages 1591-1593 ; 10263098 (ISSN) Ghafuri, H ; Hashemi, M. M ; Sharif University of Technology
    2012
    Abstract
    An efficient, highly chemoselective and simple synthesis of secondary amines via reductive amination of aldehydes, aromatic amines and inexpensive and easily accessible Diethyl 2,6-dimethyl-1,4-dihydro-3,5-pyridinedicarboxylate (DHP) in the presence of catalytic amounts of p-toluenesulfonic acid (PTSA) in water in good to excellent yields is reported  

    Structural relevance of N2O2-donor naphthodiaza-crown macrocyclic ligands to selective fluorescence signaling behavior towards aliphatic tertiary amines

    , Article Journal of Photochemistry and Photobiology A: Chemistry ; Volume 314 , 2016 , Pages 42-51 ; 10106030 (ISSN) Ghanbari, B ; Zarepour Jevinani, M ; Sharif University of Technology
    Elsevier  2016
    Abstract
    A series of N2O2-donor naphthodiaza-crown macrocyclic ligands, L1-L5, were synthesized and characterized by IR, 1H and 13C NMR spectroscopy, mass spectrometry as well as microanalysis. Preliminary observations employing UV-vis spectrophotometry of L3 in ethanol revealed that triethylamine (TEA) has a significant blue-shift effect on the entire of the spectra. Then, the detection of aliphatic and aromatic amines by L3 were followed by monitoring of fluorescence quenching of the resulting adducts in terms of their binding with L1-L5. Both steady-state and time-resolved spectroscopic measurements in the... 

    An efficient method for the ring opening of epoxides with aromatic amines by Sb(III) chloride under microwave irradiation

    , Article Journal of Chemical Research ; Issue 4 , 2008 , Pages 220-221 ; 03082342 (ISSN) Ghazanfari, D ; Hashemi, M. M ; Mottaghi, M. M ; Foroughi, M. M ; Sharif University of Technology
    2008
    Abstract
    SbCl3 supported on montmorillonite K-10 is an efficient catalyst for the ring opening of epoxides with aromatic amines under solvent-free conditions and microwave irradiation to give the corresponding b-amino alcohols in high yields with high regioselectivity  

    LiClO4 accelerated Michael addition of amines to α,β-unsaturated olefins under solvent-free conditions

    , Article Tetrahedron ; Volume 60, Issue 2 , 2004 , Pages 383-387 ; 00404020 (ISSN) Azizi, N ; Saidi, M. R ; Sharif University of Technology
    Elsevier Ltd  2004
    Abstract
    Several primary and secondary amines were added to α,β- unsaturated esters, nitriles, amides, and ketones to give the corresponding saturated amines mediated by solid lithium perchlorate under solvent-free and environmentally friendly conditions at room temperature. © 2003 Elsevier Ltd. All rights reserved  

    Water promoted Michael addition of secondary amines: To α,β- unsaturated carbonyl compounds under microwave irradiation

    , Article Synthetic Communications ; Volume 30, Issue 4 , 2000 , Pages 643-650 ; 00397911 (ISSN) Matloubi Moghaddam, F ; Mohammadi, M ; Hosseinnia, A ; Sharif University of Technology
    Marcel Dekker Inc  2000
    Abstract
    A rapid Michael addition of secondary amines to α,β-unsaturated carbonyl compounds has been achieved in good to excellent yields in the presence of water under microwave irradiation. In the absence of water and under conventional method the reaction does not proceed or take place in very low yield after a long reaction time  

    Microwave-assisted aminomethylation of electron-rich compounds under solvent-free condition

    , Article Synthetic Communications ; Volume 30, Issue 1 , 2000 , Pages 69-72 ; 00397911 (ISSN) Mojtahedi, M. M ; Sharifi, A ; Mohsenzadeh, F ; Saidi, M. R ; Sharif University of Technology
    Marcel Dekker Inc  2000
    Abstract
    Electron-rich aromatic compounds react with formaldehyde and a secondary amine under solvent-free condition, in the presence of acidic alumina in a commercial microwave oven or at room temperature to produce aminomethylated products in good to excellent yields  

    Highly chemoselective reductive amination-coupling by one-pot reaction of aldehydes, HMDS and NaBH4

    , Article Tetrahedron Letters ; Volume 49, Issue 47 , 2008 , Pages 6682-6684 ; 00404039 (ISSN) Azizi, N ; Akbari, E ; Khejeh Amiri, A ; Saidi, M. R ; Sharif University of Technology
    2008
    Abstract
    An efficient and highly chemoselective synthesis of symmetrical secondary amines via reductive amination of aldehydes with inexpensive and commercially available HMDS and sodium borohydride in high to quantitative yields is reported. © 2008 Elsevier Ltd. All rights reserved  

    Michael Addition of Aromatic Amines and Synthesis Some Derivatives of Thiomorpholins

    , M.Sc. Thesis Sharif University of Technology Hosseyni, Morteza (Author) ; Mahmoudi Hashemi, Mohammad (Supervisor) ; Ziyaei Halimehjani, Azim (Supervisor)
    Abstract
    This project investigates on synthesis of β-amino carbonyl compounds with new approach to become closer to green chemistry principals.In this project, we investigated the synthesis of β-amino carbonyl compounds with aromatic amines and electron deficient alkenes in the Michael reaction using boric acid and glycerol in water as a green media. High yields of the products and easy handling are some advantages of this procedure. Also, we investigated the Michael reaction in different solvents and temperatures but gave better results in the aqueous media. Moreover, thiomorpholine derivatives were synthesized using this method to give excellent yield.
     

    Catalyst-free regioselective ring opening of epoxides with aromatic amines in water and solvent-free conditions

    , Article Journal of the Iranian Chemical Society ; Volume 10, Issue 1 , February , 2013 , Pages 7-11 ; 1735207X (ISSN) Ziyaei Halimehjani, A ; Gholami, H ; Saidi, M. R ; Sharif University of Technology
    2013
    Abstract
    Without using any catalysts, a variety of epoxides undergo ring-opening by aromatic amines to afford the corresponding 1,2-amino alcohols in high to excellent yields with good regioselectivity in the presence of water as solvent and under solvent-free conditions  

    Palladium immobilized onto functionalized magnetic nanoparticles as robust catalysts for amination and room-temperature ullmann homocoupling of aryl halides: a walk around the C−F bond activation

    , Article Asian Journal of Organic Chemistry ; Volume 7, Issue 4 , 2018 , Pages 802-809 ; 21935807 (ISSN) Matloubi Moghaddam, F ; Pourkaveh, R ; Karimi, A ; Ayati, E ; Sharif University of Technology
    Wiley-VCH Verlag  2018
    Abstract
    The first example of a heterogeneous catalytically active system for Buchwald–Hartwig and Ullmann homocoupling of unactivated aryl halides (fluorobenzene) is presented. The novel magnetic heterogeneous palladium catalyst was synthesized by immobilization of palladium ions onto an aminopyridine-functionalized Fe3O4. The catalyst was fully characterized by FTIR spectroscopy, temperature-programmed reduction, thermogravimetric analysis, CHN elemental analysis, transmission electron microscopy, field-emission scanning electron microscopy, X-ray diffraction, energy-dispersive X-ray spectroscopy, and atomic absorption spectroscopy. By using this catalyst system, various types of primary and... 

    Reductive amination of aldehydes with sodium borohydride and lithium aluminum hydride in the presence of lithium perchlorate

    , Article Journal of the Iranian Chemical Society ; Volume 4, Issue 2 , 2007 , Pages 194-198 ; 1735207X (ISSN) Saidi, M. R ; Brown, R. S ; Ziyaei Halimjani, A ; Sharif University of Technology
    Iranian Chemical Society  2007
    Abstract
    A one-pot high yielding reductive amination of aldehydes with primary and secondary amines using LiClO4/NaBH4 and LiClO 4/LiAlH4 as reducing agents in diethyl ether is described  

    KF/Al2O3-mediated N-alkylation of amines and nitrogen heterocycles and S-alkylation of thiols

    , Article Synthetic Communications ; Volume 36, Issue 23 , 2006 , Pages 3599-3607 ; 00397911 (ISSN) Matloubi Moghaddam , F ; DokhtTaimoory, S. M ; Ismaili, H ; Rezanejade Bardajee , G ; Sharif University of Technology
    2006
    Abstract
    KF/Al2O3 efficiently catalyzes N-alkylation of heterocyclic, primary, and secondary amines and S-alkylation of thiols with a variety of alkyl halides. The N-alkylation and S-alkylation adducts were produced in good to excellent yields and in short times. Copyright © Taylor & Francis Group, LLC  

    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) Matloubi Moghaddam, F ; 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  

    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) Matloubi Moghaddam, F ; 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  

    Oxidation of alcohols and primary aliphatic amines to carbonyl compounds using sodium hypochlorite adsorbed on montmorillonite K10

    , Article Journal of Chemical Research - Part S ; Issue 5 , 2000 , Pages 224-225 ; 03082342 (ISSN) Hashemi, M. M ; Beni, Y. A ; Sharif University of Technology
    Scientific Reviews Ltd  2000
    Abstract
    NaClO adsorbed on montmorillonite K10 converts alcohols and primary aliphatic amines into corresponding carbonyl compounds  

    Solid lithium perchlorate as a powerful catalyst for the synthesis of β-aminoalcohols under solvent-free conditions

    , Article Canadian Journal of Chemistry ; Volume 83, Issue 5 , 2005 , Pages 505-507 ; 00084042 (ISSN) Azizi, N ; Saidi, M. R ; Sharif University of Technology
    2005
    Abstract
    Lithium perchlorate catalyzed the ring opening of epoxides with amines to provide the corresponding β-aminoalcohols in excellent yields with high regioselectivity. The reaction proceeds rapidly under mild and neutral conditions and worked well with primary, secondary, aliphatic, aromatic, and hindered amines in short times at room temperature, in the absence of solvent. © 2005 NRC Canada  

    Highly efficient Michael addition reaction of amines catalyzed by silica-supported aluminum chloride

    , Article Synthetic Communications ; Volume 39, Issue 6 , 2009 , Pages 1109-1119 ; 00397911 (ISSN) Saidi, M. R ; Pourshojaei, Y ; Aryanasab, F ; Sharif University of Technology
    2009
    Abstract
    Aliphatic and aromatic amines undergo smooth nucleophilic addition to α,β-unsaturated compounds in the presence of a catalytic amount of silica-supported aluminum chloride at 60°C and under solvent-free conditions to produce the corresponding β-amino compounds in excellent yields. This method is simple and convenient and works efficiently under mild conditions. This catalyst can used again without losing its activity three times. Copyright © Taylor & Francis Group, LLC