Rostami, M.,
Khosropour, A.R.,
Mirkhani, V.,
Mohammadpoor baltork, I.,
Moghadam, M.,
Tangestaninejad, S. Publication Date: 2011
Comptes Rendus Chimie (18781543)14(10)pp. 869-877
Di[1,6-bis(3-methylimidazolium-1-yl)hexane] decatungstate dihydrate ([C-6(MIm)(2)](2) W10O32. 2H(2)O) as a new family of polyoxometalate-based dicationic ionic liquids (POM-DIL) is synthesized and employed as a novel and powerful heterogeneous catalyst in the synthesis of 4-arylidene-2-phenyl-5(4)-oxazolones (azlactones) under ultrasound-assisted solvent-free condition. On the basis of the results, the products were obtained in excellent yields under mild condition. Utilization of easy work-up and purification make it very interesting from an economic perspective. Moreover, a recycling study confirmed that the catalyst can be reused multiple times without significant loss of its activity. (C) 2011 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.
Publication Date: 2006
Journal of Chemical Research (03082342)(1)pp. 29-31
Efficient solvent-free oxidation of alcohols, deprotection and oxidative deprotection of trimethylsilyl ethers and oxidative deprotection of oximes using tris [trinitratocerium (IV)] paraperiodate (TTCPP) is reported.
Mohammadpoor baltork, I.,
Moghadam, M.,
Tangestaninejad, S.,
Mirkhani, V.,
Khosropour, A.R.,
Mirjafari, A. Publication Date: 2011
Comptes Rendus Chimie (16310748)14(6)pp. 568-579
A simple, green and chemoselective method for methoxymethylation and ethoxymethylation of primary and secondary alcohols using a Lewis acidic room temperature ionic liquid, [C4mim][InCl4], as catalyst and reaction medium under ambient temperature, microwave and ultrasonic irradiations is reported. In this catalytic system, the corresponding MOM-and EOM-ethers are obtained in excellent yields and in short reaction times. Furthermore, this catalytic system was used for mild and efficient transformations of these protected alcohols to their corresponding acetates and trimethylsilyl ethers under thermal conditions and microwave and ultrasonic irradiations. © 2010 Académie des sciences. Published by Elsevier Masson SAS. All rights reserved.
Publication Date: 2010
Journal of the Iranian Chemical Society (1735207X)7(3)pp. 673-677
The use of ultrasonic irradiation for the selective synthesis of sulfone in the oxidation of sulfides with NaIO4 catalyzed by Mn(Salophen) supported on chloromethylated polystyrene-bound imidazole, [Mn(Salophene)-PSI], is reported. This heterogeneous catalyst efficiently catalyzed selective oxidation of sulfides to sulfones under ultrasonic irradiation and no sulfoxide was detected in the reaction mixture.
Publication Date: 2016
Journal Of The Iranian Chemical Society (1735207X)13(6)pp. 1061-1067
Effective epoxidation of alkenes using sodium periodate was accomplished with Manganese (III) tetrakis(p-sulfonatophenyl)porphyrin, [C44H26N4O12S4Na4], supported on ionic liquids-modified silica, Im-SiO2, under ultrasonic irradiation conditions is reported. This heterogeneous catalyst, [Mn(TPPS)@SiO2-Im] was characterized by elemental analysis, scanning electron microscopy (SEM), FT-IR and UV–Vis spectroscopic methods. The synthesized hybrid catalyst was applied for efficient epoxidation of various alkenes with sodium periodate in acetonitrile under ultrasonic irradiation conditions. This solid catalyst can be easily recovered by simple filtration and reused several time without apparent loss of its catalytic activity. © 2016, Iranian Chemical Society.
Publication Date: 2010
Polyhedron (02775387)29(1)pp. 212-219
Tin(IV)tetraphenylporphyrinato tetrafluoroborate, [SnIV(TPP)(BF4)2], was used as an efficient catalyst for trimethylsilylation of alcohols and phenols with hexamethyldisilazane (HMDS). High-valent [SnIV(TPP)(BF4)2] catalyzes trimethylsilylation of primary, secondary and tertiary alcohols as well as phenols, and the corresponding TMS-ethers were obtained in high yields and short reaction times at room temperature. While, under the same reaction conditions [SnIV(TPP)Cl2] is less efficient to catalyze these reactions. One important feature of this catalyst is its ability in the chemoselective silylation of primary alcohols in the presence of secondary and tertiary alcohols and phenols. The catalyst was reused several times without loss of its catalytic activity. © 2009 Elsevier Ltd. All rights reserved.
Shaabani, A.,
Rahmati, A.,
Aghaaliakbari, B.,
Safaei-ghomi, J. Publication Date: 2006
Synthetic Communications (00397911)36(1)pp. 65-70
Trisubstituted imidazoles have been synthesized in very short reaction times with excellent yields in the presence of 1,1,3,3-N,N,N′,N′- tetramethylguanidinium trifluoroacetate as an ionic liquid at 100°C. The ionic liquid can be recycled for subsequent reactions without any appreciable loss of efficiency. Copyright © Taylor & Francis LLC.
Hojati, S.F.,
Mohammadpoor baltork, I.,
Maleki, B.,
Gholizadeh, M.,
Shafiezadeh, F.,
Haghdoust, M. Publication Date: 2010
Canadian Journal of Chemistry (00084042)88(2)pp. 135-141
A simple, facile, and efficient procedure for the synthesis of 2-arylthizolines and 2-arylimidazolines has been developed by the simple condensation of nitriles with 2-aminoethanethiol or ethylenediamine catalyzed by 1,3-dibromo-5,5-dimethylhydantoin under solvent-free conditions. Selective preparation of bisthiozolines and monoimidazolines from dinitriles and also selective conversion of arylnitriles to their corresponding 2-arylthiazolines or imidazolines in the presence of alkylnitriles can be considered as considerable advantages of this method.
Publication Date: 2000
Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry (03764699)39(11)pp. 863-866
The preparation of 1,4-dibenzyl-1,4-diazoniabicyclo[2.2.2]-octane chlorochromate 1 is described. With this reagent benzylic and allylic alcohols are selectively oxidized to their corresponding carbonyl compounds in excellent yields. Oximes, thiols and aromatic amines are also converted to their corresponding carbonyl compounds, disulfides and azo compounds efficiently.
Publication Date: 2008
Polyhedron (02775387)27(12)pp. 2612-2624
A wide variety of primary and secondary alcohols were efficiently converted to their corresponding methoxymethyl (MOM) and ethoxymethyl (EOM) ethers in the presence of catalytic amounts of supported H3PW12O40 on silica gel and zirconia at room temperature and under microwave irradiation at solvent-free conditions, whereas, phenols and tertiary alcohols remained intact under the same reaction conditions. Deprotection of these ethers to their parent alcohols was also achieved using these heterogeneous catalysts in ethanol, as a green solvent, under reflux conditions and microwave irradiation. Selective deprotection of primary and secondary MOM- and EOM-ethers in the presence of phenolic and tertiary ones, methyl and benzyl ethers, esters and trimethylsilyl ethers was achieved by these reagent systems. The present methodology offers several advantages such as short reaction times, high yields, simple procedure, heterogeneous reaction conditions, selectivity, non-toxicity and reusability of the catalysts. © 2008.
Publication Date: 2000
Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry (03764699)39(3)pp. 239-242
1-Benzyl-1-azonia-4-azabicyclo[2.2.2]octane tetrahydroborate (BAAOTB) 1 generated as white solid from commercially available DABCO and sodium borohydride is found to be a selective and versatile reducing agent. The reagent in t-butanol is very useful for reduction of imines, enamines, oximes, reductive amination of aldehydes and ketones and reductive methylation of amines.
Publication Date: 2012
Iranian Journal Of Chemistry And Chemical Engineering (10219986)31(1)pp. 1-8
1-Butyl-3-methylimidazolium bromide ([bmim]Br) as an ionic liquid promoted selectively oxidation of aliphatic and aromatic sulfides to the corresponding sulfoxides and the oxidative coupling of thiols to disulfides by NaBrO3 in excellent yields under neutral conditions.
Rastegari, F.,
Mohammadpoor baltork, I.,
Khosropour, A.R.,
Tangestaninejad, S.,
Mirkhani, V.,
Moghadam, M. Publication Date: 2015
RSC Advances (20462069)5(20)pp. 15274-15282
1-Methyl-3-(propyl-3-sulfonic acid)imidazolium triflate supported on magnetic nanoparticles ([HSO3PMIM]OTf-SiO2@MNPs) was prepared by immobilization of [HSO3PMIM]OTf onto the surface of silica-coated Fe3O4 nanoparticles and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), vibrating sample magnetometry (VSM), and FT-IR techniques. Efficient synthesis of mono- and bis-isobenzofuran-1(3H)-ones was performed in the presence of this catalyst under thermal conditions and MW irradiation. The catalyst could be easily separated by an external magnet and reused six times under thermal conditions and MW irradiation without significant loss of its activity. © 2015 The Royal Society of Chemistry.
Publication Date: 2011
Comptes Rendus Chimie (16310748)(10)
Di[1,6-bis(3-methylimidazolium-1-yl)hexane] decatungstate dihydrate ([C6(MIm)2]2W10O32. 2H2O) as a new family of polyoxometalate-based dicationic ionic liquids (POM-DIL) is synthesized and employed as a novel and powerful heterogeneous catalyst in the synthesis of 4-arylidene-2-phenyl-5(4)-oxazolones (azlactones) under ultrasound-assisted solvent-free condition. On the basis of the results, the products were obtained in excellent yields under mild condition. Utilization of easy work-up and purification make it very interesting from an economic perspective. Moreover, a recycling study confirmed that the catalyst can be reused multiple times without significant loss of its activity. © 2011 Académie des sciences. Published by Elsevier Masson SAS. All rights reserved.
Publication Date: 1996
Synthetic Communications (00397911)26(1)pp. 1-7
3-Carboxypyridinium chlorochromate(CPCC) is an inexpensive, easily prepared and stable reagent With this reagent oximes, phenylhydrazones, p-nitrophenylhydrazones, semicarbazones and azines are converted to their corresponding carbonyl compounds in good to excellent yields.
Karimi, F.,
Tighsazzadeh, B.,
Asadi, B.,
Mohammadpoor baltork, I.,
Layeghi, M.,
Mirkhani, V.,
Tangestaninejad, S.,
Moghadam, M. Publication Date: 2022
RSC Advances (20462069)12(34)pp. 22180-22187
An efficient and reusable catalyst, which is 3-(propylthio)propane-1-sulfonic acid immobillized on functionalized magnetic nanoparticles [PTPSA@SiO2-Fe3O4], has been synthesized. For the first time, it is highlighted under solvent-free conditions for the catalytic activity in multicomponent synthesis of dihydrotetrazolo[1,5-a]pyrimidines, dihydrotetrazolo[1,5-a]pyrimidine-6-carboxylates and tetrahydrotetrazolo[5,1-b]quinazolinones. The structure of the catalyst was well confirmed by characterization techniques, such as FT-IR, TGA, SEM-EDX, elemental mapping, TEM, VSM and elemental analysis. Besides, this unique catalyst was found to be effectual up to six cycles, which made it spotlighted. Recyclability of catalyst, excellent yield of the products, short reaction time and clean reaction profile are the advantages of the present protocol. © 2022 The Royal Society of Chemistry.
Publication Date: 2005
Canadian Journal of Chemistry (00084042)83(2)pp. 115-121
3-Carboxypyridinium chlorochromate (CPCC) in the presence of aluminium chloride is a very efficient reagent for the selective oxidation of sulfides to sulfoxide and sulfones in solution and under microwave irradiation. It is noteworthy that different functional groups including carbon-carbon double bonds, ketones, oximes, aldehydes, ethers, and acetals were tolerated under these reaction conditions. © 2005 NRC Canada.
Publication Date: 1997
Synthesis (00397881)(7)pp. 756-758
Primary and secondary trimethylsilyl and tetrahydropyranyl (THP) ethers are converted to their carbonyl compounds efficiently using 3- carboxypyridinium chlorochromate. Trimethylsilyl ethers are oxidized selectively in the presence of tetrahydropyranyl ethers.
Publication Date: 2000
Journal of Chemical Research (03082342)2000(1)pp. 40-41
A variety of Hantzsch 1,4-dihydropyridines are oxidized to their corresponding pyridines in excellent yields by 3-carboxypyridinium chlorochromate.
Sheibani, E.,
Heydari, M.,
Ahangar, H.,
Mohammadi, H.,
Fard, H.T.,
Taghavinia, N.,
Samadpour, M.,
Tajabadi, F. Publication Date: 2019
Solar Energy (0038092X)189pp. 404-411
Carbazole compounds are p-type hole-transporting materials (HTMs) useful for perovskite solar cells (PSCs). In this work, we developed a new class of carbazol based HTMs; non-fused 3-D asymmetric structures (S14 and S12) as HTM of PSCs. To the best of our knowledge, there is no report on non-fused HTMs with a high glass transition temperature (Tg = 165 °C), which reduces crystallization and suppresses grain boundaries in glassy film, resulting in long-term durability. Experimental results show that tuning the carbazole moiety in S14 structure has a constructive influence on geometrical alignment, hole mobility, hydrophobicity, stability as well as efficiency. The resultant power conversion efficiency (PCE) of devices were 15.31% and 11.85% for S14 and S12, respectively. Cell efficiency decreases during the first day for all devices. But after this time, the cell efficiency of the device fabricated with S14 remains constant until 1000 h at atmospheric condition without encapsulation while for devices fabricated by S12 and Spiro-OMeTAD the cell efficiency decreases to 75% and 69%. © 2019
Publication Date: 2022
Additive Manufacturing (22148604)58
Additive manufacturing technology is a growing field, which demands advanced chemistry and fabrication process if smart-materials are desired. Herein, the concept of jammed microgels designed with a new crosslinking method is introduced to be used in 3D-printing applications. Jammed microgels decorated with superficial hydrophobic segments and pure thermo-sensitive gelatin are applied as inks and exhibit shear-induced transition and fast recoverability, which are important for 3D-printing. The interaction of microgels within the as-extruded filaments and with the adjacent deposited layers guarantees shape-fidelity. After printing, a deep eutectic solvent (DES) formed from Arginine and Glycerol ([DES]Arg/Gly) is applied over the construct to trigger a chemical crosslinking reaction between epoxy and amine groups. The introduced [DES]Arg/Gly can play simultaneously two roles: (1) activator of covalent bond formation and (2) conducting agent. Generally, a variety of features including printability, rheological properties and shape-retention are dependent on the fraction of hydrophobic segments and the applied [DES]Arg/Gly concentration. Further, the main network percolation reaction follows a different strategy to achieve a sustainable printable system with biological, mechanical and physiological sustainability of the construct. These results open new possibilities to fabricate a wide range of adaptive platforms of smart materials with ease. © 2022 Elsevier B.V.
Etminani-isfahani, N.,
Mohammadbagheri, Z.,
Rahmati, A. Publication Date: 2020
Carbohydrate Polymers (0144-8617)250
An efficient cellulosic superabsorbent based on a novel functional monomer 4-(6-aminohexyl) amino-4-oxo-2-butenoic acid (AHOB) and acrylic acid was successfully synthesized by free-radical solution polymerization and the effect of the AHOB monomer on the structure, morphology, thermal behavior and viscoelastic features of this superabsorbent was investigated by FTIR, SEM, TGA and rheology methods. Also, the influence of this monomer on the water absorption capacity in various pH and different saline solutions, kinetic behavior, water retention capacity and reusability of the superabsorbent was perused. The results of these experiments confirmed the significant role of the AHOB monomer in improving the properties of the superabsorbent. The excellent absorbency (800.37 g/g in distilled water and 78.02 g/g in 1 wt.% NaCl solution) and high water retention capacity of the prepared superabsorbent showed that it can be used as an efficient water-saving material for agricultural applications. © 2020 Elsevier Ltd
Zolfigol, M.A.,
Azarifar, D.,
Mallakpour, S.,
Mohammadpoor baltork, I.,
Forghaniha, A.,
Maleki, B.,
Abdollahi-alibeik, M. Publication Date: 2006
Tetrahedron Letters (00404039)47(5)pp. 833-836
4-(p-Chloro)phenyl-1,3,4-triazole-3,5-dione is used as an effective oxidizing agent for the oxidation of 1,3,5-trisubstituted pyrazolines to their corresponding pyrazoles under mild conditions with moderate to good yields at room temperature. © 2005 Elsevier Ltd. All rights reserved.
Sheikhi, M.,
Vakili, S.,
Karimi, N.,
Rafiemanzelat, F.,
Maleki, A.,
Taheri, A.,
Mohamadnia, Z.,
Ramazani, A. Publication Date: 2025
ACS Applied Polymer Materials (26376105)7(3)pp. 1717-1728
Soft robots with intelligent shape-changing capabilities and spatially controlled actuation are essential for enhancing their performance. Here, three-dimensional printing of self-healing, near-infrared light-responsive shape memory granular hydrogels (SLSH) was introduced. The hydrogels were formulated using four distinct microgels: β-cyclodextrin-functionalized microgels (CDMGs) and 1-adamantylamine-functionalized microgels (AMGs) to promote host-guest physical interactions for self-healing and shear-thinning properties; polydopamine-functionalized microgels (PMGs) for photothermal conversion and antibacterial activity; and microgels with epoxy groups (MG) to enable chemical cross-linking with Jeffamine, forming a shape memory framework. The shear-thinning, shape memory, and self-healing characteristics were influenced by physical interactions within the ink as well as the chemical bonds formed after postprinting treatment. The viscosity and yield strength of the inks showed an increasing trend with a higher fraction of CDMG and AMG, indicating stronger reversible attractions within the jammed assembly of particles. Upon irradiation with an intensity of 1000 mW·cm-2 for 2 min, the internal temperature of the hydrogels increased to 38.2-43.0 °C, depending on the hydrogel type. For SLSH70, a distinct melting peak was recorded at 35-41 °C, associated with the melting of crystalline domains of Jeffamine, which was essential for the thermal shape recovery of the construct. After 1 h of fixation, the hydrogels SLSH30, SLSH50, and SLSH70 demonstrated a shape-fixing efficiency of 98.22 ± 0.45, 99.38 ± 0.68, and 98.54 ± 0.26%, respectively, with shape recovery efficiency approaching approximately 100%. During the self-healing process, complete reattachment occurred after 24 h at 25 °C for SLSH30, while the other samples exhibited a weaker healing ability. Finally, the results of antibacterial investigations highlighted the synergistic effects of PMG’s inherent antibacterial properties and its photothermal activity within the bacterial environment. © 2025 American Chemical Society.
Zolfigol, M.A.,
Ghorbani choghamarani a., A.G.,
Shahamirian, M.,
Safaiee, M.,
Mohammadpoor baltork, I.,
Mallakpour, S.,
Abdollahi-alibeik, M. Publication Date: 2005
Tetrahedron Letters (00404039)46(33)pp. 5581-5584
4-Substituted 1,3,4-triazole-3,5-diones were used as effective and recyclable oxidizing agents for the oxidation of 1,4-dihydropyridines to the corresponding pyridine derivatives under mild conditions with good to excellent yields. © 2005 Elsevier Ltd. All rights reserved.
