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Aromatization of Hantzsch 1,4-dihydropyridines by hydrogen peroxide in the presence of cobalt(II) acetate
, Article Monatshefte fur Chemie ; Volume 134, Issue 1 , 2003 , Pages 107-110 ; 00269247 (ISSN) ; Ahmadibeni, Y ; Ghafuri, H ; Sharif University of Technology
2003
Abstract
Hydrogen peroxide readily oxidizes Hantzsch type 1,4-dihydropyridines in the presence of cobalt(II) acetate as catalyst at room temperature. No evidence of a dealkylation process for 4-alkyl 1,4-dihydropyridines has been observed
Room temperature catalytic aromatization of Hantzsch 1,4-dihydropyridines by sodium nitrite in the presence of acidic silica gel
, Article Monatshefte fur Chemie ; Volume 137, Issue 2 , 2006 , Pages 197-200 ; 00269247 (ISSN) ; Ghafuri, H ; Karimi Jaberi, Z ; Sharif University of Technology
2006
Abstract
Various alkyl, aryl, and heterocyclic Hantzsch 1,4-dihydropyridines were converted to the corresponding pyridines in excellent yields and short times using sodium nitrite in the presence of a catalytic amount of acidic silica gel at room temperature. © Springer-Verlag 2006
N-Chlorosuccinimide: A simple and efficient reagent for the preparation of symmetrical disulfides
, Article Journal of Sulfur Chemistry ; Volume 27, Issue 2 , 2006 , Pages 165-167 ; 17415993 (ISSN) ; Ghafuri, H ; Karimi Jaberi, Z ; Sharif University of Technology
2006
Abstract
The efficient oxidative coupling of thiols to disulfides with N-chlorosuccinimide (NCS) at room temperature is described. Simple workup, economical method, high yields of products are some advantages of this method. © 2006 Taylor & Francis
Silicon tetrachloride catalyzed aza-michael addition of amines to conjugated alkenes under solvent-free conditions
, Article Synlett ; Issue 3 , 2010 , Pages 379-382 ; 09365214 (ISSN) ; Baghi, R ; Ghafuri, H ; Bolourtchian, M ; Hashemi, M ; Sharif University of Technology
Abstract
The efficient and very simple conjugate addition of aromatic and aliphatic amines to α,β-unsaturated carbonyl compounds under solvent-free conditions in the presence of catalytic amount of silicon tetrachloride is reported. The reaction of aryl and alkyl amines with different Michael acceptors gave the corresponding Michael adducts with simple catalyst and good to excellent yields
Iron-catalyzed inexpensive and practical synthesis of N-substituted pyrroles in water
, Article Synlett ; Issue 14 , 2009 , Pages 2245-2248 ; 09365214 (ISSN) ; Khajeh Amiri, A ; Ghafuri, H ; Bolourtchian, M ; Saidi, M. R ; Sharif University of Technology
2009
Abstract
An operationally simple, practical, and economical protocol for iron(III) chloride catalyzed Paal-Knorr pyrrole synthesis in water in good to excellent yields has been developed. Several N-substituted pyrroles are readily prepared from the reaction of 2,5-dimethoxytetrahydrofuran and aryl/alkyl, sulfonyl and acyl amines under very mild reaction conditions. © Georg Thieme Verlag Stuttgart
Simple and practical protocol for the silylation of phenol derivatives using reusable NaHSO4 dispread on silica gel under neutral conditions
, Article Phosphorus, Sulfur and Silicon and the Related Elements ; Volume 182, Issue 1 , 2007 , Pages 175-179 ; 10426507 (ISSN) ; Ghafuri, H ; Mojahedi Jahromi, S ; Hashemi, M. M ; Sharif University of Technology
2007
Abstract
A simple and mild procedure for the trimethylsilylation of a wide variety of phenols with hexamethyldisilazane (HMDS) on the surface of silica gel dispersed with NaHSO4 at r.t. in a few minutes with excellent yields under neutral conditions is reported. This procedure also allows an excellent selectivity for the silylation of phenols in the presence of amine and CO 2H groups
Biocompatibility and hyperthermia efficiency of sonochemically synthesized magnetic nanoparticles
, Article SPIN ; Volume 9, Issue 2 , 2019 ; 20103247 (ISSN) ; Malaie Balasi, Z ; Ahadian, M. M ; Hatamie, S ; Shahsavari Alavijeh, M. H ; Ghafuri, H ; Sharif University of Technology
World Scientific Publishing Co. Pte Ltd
2019
Abstract
Hereby, a sonochemical method for synthesis of pure magnetic Fe3O4Onanoparticles (Fe3O4-NPs) in large scale is being introduced. Synthesis proceeds via simple approach, at room temperature, under sonication, using cheap reagents, green antioxidant-reductant reagent and without using inert gas purge as protective atmosphere condition. During this procedure, hydrogen gas releases continuously as valuable byproduct at the anaerobic step of reaction. Characterizations' results indicate that the final product is pure spherical Fe3O4-NPs, with narrow size distribution and about less than 32nm in mean diameter while more than 99% of particles size were less than 40nm. According to Vibrational...