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    Efficient synthesis of novel 3-substituted coumarin-3-carboxamide

    , Article Journal of the Korean Chemical Society ; Vol. 58, Issue. 2 , 20 April , 2014 , pp. 186-192 ; ISSN: 2234-8530 (Online) Sheikhhosseini, E ; Balalaie, S ; Bigdeli, M. A ; Habibi, A ; Moghaddam, H. P ; Sharif University of Technology
    Abstract
    A series of novel pseudopeptides contained coumarin skeleton were synthesized through the Ugi-four-component reaction. The 3-substituted coumarin-3-carboxamides were formed through reaction of benzaldehyde derivatives, anilines, coumarin-3- carboxylic acid and isocyanides with high yields and high bond-forming efficiency at room temperature. These novel amidated coumarins exhibit brilliant fluorescence in range of 535-547 nm in chloroform  

    Convenient synthesis of chlorohydrins from epoxides using zinc oxide: Application to 5,6-epoxysitosterol

    , Article Heteroatom Chemistry ; Volume 20, Issue 3 , 2009 , Pages 157-163 ; 10427163 (ISSN) Matloubi Moghaddam, F ; Saeidian, H ; Mirjafary, Z ; Jebeli Javan, M ; Moridi Farimani, M ; Seirafi, M ; Sharif University of Technology
    2009
    Abstract
    Efficient synthesis of protected and unprotected chlorohydrins has been achieved by ring opening of epoxides with acetyl/benzoyl chloride and TMSCl using a catalytic amount of ZnO as a reusable catalyst. The applicability of ZnO is further extended by performing the cleavage of the natural product 5,6-epoxysitosterol with acetyl chloride. © 2009 Wiley Periodicals, Inc  

    A facile synthesis of bridged polycyclic naphthooxazocine skeletons: Eight-membered-ring constructions via tandem dinucleophilic addition of naphthalenols to quinolinium salts

    , Article Helvetica Chimica Acta ; Volume 94, Issue 1 , 2011 , Pages 142-147 ; 0018019X (ISSN) Matloubi Moghaddam, F ; Taheri, S ; Mirjafary, Z ; Saeidian, H ; Kiamehr, M ; Tafazzoli, M ; Sharif University of Technology
    2011
    Abstract
    The efficient synthesis of bridged polycyclic naphthooxazocines 3 via addition of naphthalenols 1 as a bis-nucleophile to N-alkylquinolinium salts 2 is described (Scheme 1 and Table 2). This new approach provides a powerful entry into polycyclic structures containing bicyclic N,O-acetals related to bioactive compounds  

    Synthesis of novel polycyclic indole-annulated thiopyranocoumarin derivatives via domino Knoevenagel-hetero-Diels-Alder reaction in aqueous media

    , Article Helvetica Chimica Acta ; Volume 93, Issue 5 , 2010 , Pages 964-973 ; 0018019X (ISSN) Matloubi Moghaddam, F ; Kiamehr, M ; Taheri, S ; Mirjafary, Z ; Sharif University of Technology
    Abstract
    An efficient synthesis of polycyclic indole derivatives is achieved via domino Knoevenagel - hetero-Diels - Alder reaction of O-acrylated salicylaldehyde derivatives with dihydroindole-2-thiones in H2O as solvent. The products are formed in good-to-excellent yields with high regio- and stereoselectivity  

    New smart carrageenan-based superabsorbent hydrogel hybrid: Investigation of swelling rate and environmental responsiveness

    , Article Journal of Applied Polymer Science ; Volume 117, Issue 6 , September , 2010 , Pages 3228-3238 ; 00218995 (ISSN) Salimi, H ; Pourjavadi, A ; Seidi, F ; Eftekhar Jahromi, P ; Soleyman, R ; Sharif University of Technology
    2010
    Abstract
    Synthesis of novel natural-based superabsorbents with improved properties is of prime importance in many applications. In this article we report an efficient synthesis of new polysaccharide-based superabsorbent hybrid composing carrageenan, acrylic acid, sodium acrylate, and 2-hydroxyethyl acrylate through homogenous solution polymerization process. Infrared spectroscopy and thermogravimetric analysis (TGA) were carried out to confirm the chemical structure of the hydrogel. Moreover, morphology of the samples was examined by scanning electron microscopy (SEM). To deeper studies on the structure-property relation in SAP hydrogels, three hydrogels with different acrylic acid/2-hydroxyethyl... 

    Rapid and efficient synthesis of colloidal gold nanoparticles by arc discharge method

    , Article Applied Physics A: Materials Science and Processing ; Volume 96, Issue 2 , 2009 , Pages 423-428 ; 09478396 (ISSN) Ashkarran, A. A ; Iraji zad, A ; Mahdavi, M ; Ahadian, M. M ; Hormozi nezhad, M. R ; Sharif University of Technology
    2009
    Abstract
    We report a simple, inexpensive and one-step synthesis route of colloidal gold nanoparticles using arc discharge between titanium electrodes in HAuCl 4 solution achieving long-time stability. Gold nanoparticles of 8 nm diameter were formed during reduction of HAuCl4 in the plasma discharge zone. The resulting nanoparticles were characterized using UV-Vis spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Optical absorption spectroscopy of as prepared samples at 15 A arc current in HAuCl4 solution shows a surface plasmon resonance around 550 nm. It was found that sodium citrate acts as a stabilizer and surface capping agent of the colloidal... 

    Efficient synthesis of novel coumarin-3-carboxamides (=2-oxo-2h-1- benzopyran-3-carboxamides) containing lipophilic spacers

    , Article Helvetica Chimica Acta ; Volume 95, Issue 3 , 2012 , Pages 528-535 ; 0018019X (ISSN) Balalaie, S ; Bigdeli, M. A ; Sheikhhosseini, E ; Habibi, A ; Moghadam, H. P ; Naderi, M ; Sharif University of Technology
    Abstract
    The novel coumarin-3-carboxamides (=2-oxo-2H-1-benzopyran-3-carboxamides) 5a-5g containing lipophilic spacers were synthesized through the Ugi-four-component reaction (Scheme 1). The reactions of aromatic aldehydes 1, 4,4'-oxybis[benzenamine] or 4,4'-methylenebis[benzenamine] as diamine 2, coumarin-3-carboxylic acid (=2-oxo-2H-benzopyran-3-carboxylic acid; 3), and alkyl isocyanides 4 lead to the desired substituted coumarin-3-carboxamides 5a-5g at room temperature with high bond-forming efficiency. These novel coumarin derivatives exhibit brilliant fluorescence at 544 nm in CHCl 3