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Fe/Al-MCM-41: An Efficient and Reusable Catalyst for the Synthesis of Quinoxaline Derivatives
Heravi, Majid. M.,Hosseini, Mariam,Oskooie, Hossein A.,Baghernejad, Bita Korean Chemical Society 2011 대한화학회지 Vol.55 No.2
Fe/Al-MCM-41을 촉매로 사용하여, 1,2-diamines과 1,2-dicarbonyl 화합물을 축합반응을 통하여 quinoxaline 계 화합물을 좋은 수율로 합성하였다. Fe/Al-MCM-41was found to be an effective catalyst for the synthesis of quinoxaline derivatives from the condensation of the 1,2-diamines and 1,2-dicarbonyl compounds in good yields. The catalyst is recyclable and reusable.
Sodium Silicate-catalyzed Multicomponent Synthesis of Pyridine Dicarbonitriles
Heravi, Majid M.,Khorshidi, Maliheh,Beheshtia, Yahia. Sh.,Baghernejad, Bita Korean Chemical Society 2010 Bulletin of the Korean Chemical Society Vol.31 No.5
Pyridine dicarbonitriles have been synthesized good yields via a one-pot multi.component reaction of aldehyde, malononitrile, and thiol in the presence of sodium silicate as a catalyst in ethanol.
Sodium Silicate-catalyzed Multicomponent Synthesis of Pyridine Dicarbonitriles
Majid M. Heravi,Maliheh Khorshidi,Sh. Beheshtia,Bita Baghernejad 대한화학회 2010 Bulletin of the Korean Chemical Society Vol.31 No.5
Pyridine dicarbonitriles have been synthesized good yields via a one-pot multi–component reaction of aldehyde,malononitrile, and thiol in the presence of sodium silicate as a catalyst in ethanol.
Brønsted Acidic Ionic Liquids as Efficient Catalysts for Clean Synthesis of Carbamatoalkyl Naphthols
Niloofar Tavakoli-Hoseini,Majid M. Heravi,Fatemeh F. Bamoharram,Abolghasem Davoodnia 대한화학회 2011 Bulletin of the Korean Chemical Society Vol.32 No.3
Under mild conditions and without any additional organic solvent, synthesis of carbamatoalkyl naphthols could be carried out in the present of two halogen-free Brønsted acidic ionic liquids, 3-methyl-1-(4-sulfonic acid)butylimidazolium hydrogen sulfate and N-(4-sulfonic acid)butylpyridinium hydrogen sulfate. A wide range of aromatic aldehydes easily undergo condensation with β-naphthol and methyl or benzyl carbamate to afford the desired products of good purity in excellent yields. The present methodology offers several advantages such as a simple procedure with an easy work-up, short reaction times, and excellent yields. The catalysts could be recycled and reused for several times without substantial reduction in their catalytic activities.
Brønsted Acidic Ionic Liquids as Efficient Catalysts for Clean Synthesis of Carbamatoalkyl Naphthols
Tavakoli-Hoseini, Niloofar,Heravi, Majid M.,Bamoharram, Fatemeh F.,Davoodnia, Abolghasem Korean Chemical Society 2011 Bulletin of the Korean Chemical Society Vol.32 No.3
Under mild conditions and without any additional organic solvent, synthesis of carbamatoalkyl naphthols could be carried out in the present of two halogen-free Br${\phi}$nsted acidic ionic liquids, 3-methyl-1-(4-sulfonic acid)butylimidazolium hydrogen sulfate and N-(4-sulfonic acid)butylpyridinium hydrogen sulfate. A wide range of aromatic aldehydes easily undergo condensation with $\beta$-naphthol and methyl or benzyl carbamate to afford the desired products of good purity in excellent yields. The present methodology offers several advantages such as a simple procedure with an easy work-up, short reaction times, and excellent yields. The catalysts could be recycled and reused for several times without substantial reduction in their catalytic activities.
Zeinali-Dastmalbaf, Mohsen,Davoodnia, Abolghasem,Heravi, Majid M.,Tavakoli-Hoseini, Niloofar,Khojastehnezhad, Amir,Zamani, Hassan Ali Korean Chemical Society 2011 Bulletin of the Korean Chemical Society Vol.32 No.2
A green and efficient method for the synthesis of 3,4-dihydropyrimidin-2(1H)-ones and -thiones through one-pot three-component reaction of ethyl acetoacetate, an aryl aldehyde, and urea or thiourea in acetonitrile using silica gel-supported polyphosphoric acid (PPA-$SiO_2$) as catalyst is described. Compared to the classical Biginelli reaction conditions, the present methodology offers several advantages such as high yields, relatively short reaction times, mild reaction condition and a recyclable catalyst with a very easy work up.
ALI AYATI,ALI AHMADPOUR,FATEMEH F. BAMOHARRAM,MAJID M. HERAVI,HAMED RASHIDI 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2012 NANO Vol.7 No.1
Preparation of gold nanoparticles by chemical reduction method using Preyssler heteropolyacid was investigated. The experimental conditions have been optimized using Taguchi robust design method with L9 orthogonal array. Particle size of the gold nanoparticles was considered as the property in the optimization. Amounts of Preyssler heteropolyacid, pH and irradiation time were selected as the main parameters. The result of Taguchi analysis has shown that in this process, the preyssler acid amount is the most influencing parameter on the size of gold nanoparticle. Also, the effects of different parameters are in order to: Preyssler acid amount > pH > irradiation time (negligible). This method showed that decreasing Preyssler amount and increasing pH of solution lead to formation of smaller nanoparticles. Finally, the prepared nanoparticles at optimum condition with a size of about 6.42 were characterized by using Dynamic Light Scattering (DLS) method, transmission electron microscopy (TEM), and UV-Vis spectroscopy.
Masoumeh Zakeri,Mohamed Mahmoud Nasef,Ebrahim Abouzari-Lotf,Arezoo Moharami,MAJID M. HERAVI 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.29 No.-
Green approaches to the synthesis of spiro-4H-pyrans are reported based on the one-pot and three-component condensation via a domino Knoevenagel/Michael/cyclization sequence. These approachesinvolve evaluation of the activity of several organocatalysts in water as a reaction media and also undersolvent-free in both microwave irradiation and ball milling conditions. Extensive experiments werecarried out to optimize the reaction parameters including type and amount of catalyst, reactiontemperature and time. Microwave irradiation in presence of 4-dimethylaminopyridine (DMAP) wasobserved as the best procedure with good yields, short reaction time, environmental friendliness, andconvenient operation.