ORIGINAL_ARTICLE
Synthesis of dihydropyridines and quinoxaline derivatives using 1-methyl-3-(2-(sulfooxy)ethyl)-1H-imidazol-3-ium chloride as a new, reusable and efficient Bronsted acidic ionic liquid catalyst
In this work, the efficiency, generality and applicability of new silica supported Brønsted acidic ionic liquid (BAIL) 1-methyl-3-(2-(sulfooxy)ethyl)-1H-imidazol-3-ium chloride as heterogeneous and green catalyst for organic transformations are studied. Herein, the following one-pot multi-component reactions in the presence of [Msei]Cl are investigated: (i) the synthesis of quinoxaline derivatives from phenylendiamine and 1,2-diketones in EtOH and under mild conditions (room temperature), (ii) the preparation of 1,4-dihydropyridines from one-pot multi component condensation of 1,3-dicarbonyl compounds(2 equiv.), NH4OAc (1.5 equiv.) and aldehydes (1 equiv.) under solvent-free conditions at moderate temperature (90 °C). High yields, relatively short reaction times, efficiency, generality, clean process, simple methodology, low cost, easy work-up, ease of preparation and regeneration of the catalyst and green conditions (in the synthesis of the quinoxaline derivatives) are advantages of the application of [Mesi]Cl as catalyst in the above organic reactions.
https://www.ajgreenchem.com/article_46496_cb0e6e23e271031d5624d18529f33e46.pdf
2017-07-01
1
15
10.22631/ajgc.2017.46496
Dihydropyridines
quinoxaline derivatives
Solid acid
Ionic Liquid
Green chemistry
Sami
Sajjadifar
ss.sajjadifar@gmail.com
1
Department of Chemistry, Payame Noor University, PO BOX 19395-4697 Tehran, Iran.
LEAD_AUTHOR
Sarvin
Mohammadi-Aghdam
sarvin.s108@gmail.com
2
Department of Chemistry, Payame Noor University, PO BOX 19395-4697 Tehran, Iran.
AUTHOR
[1]. Choudharym D., Paul S., Gupta R., Clark J.H. Green Chem, 2006, 8:479
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ORIGINAL_ARTICLE
Production of biodiesel from jatropha curcas oil using solid heterogeneous acid catalyst
Biodiesel produced by the transesterification of vegetable oils is a promising alternative fuel to diesel because of limited fossil fuel resources and environmental concerns. The use of heterogeneous catalysts greatly simplifies the technological process by facilitating the separation of the post-reaction mixture. The use of heterogeneous catalysts greatly simplifies the technological process by facilitating the separation of the post-reaction mixture. The purpose of the present work was to examine a heterogeneous catalyst, in particular, to produce methyl esters of jatropha curcas oil (JCO). In this study, the trans esterification of JCO with methanol was studied in a heterogeneous system, using Mg-Al hydrotalcites as solid base catalysts. The dependence of the conversion of JCO on the reactions variables such as the molar ratio of methanol/ oil, the amount of catalysts used, reaction temperatures and reaction times were performed. The conversion of 99% was achieved under the optimum reaction conditions.
https://www.ajgreenchem.com/article_46511_3ce143e94e164fb3cd8ba8be9b0a31f4.pdf
2017-07-01
16
23
10.22631/ajgc.2017.46511
Biodiesel
Transesterification
solid base catalysts
Mg-Al hydrotalcites
jatropha curcas oil
Hadi
Jabbari
hadijabbari@yahoo.com
1
Department of Management, Payam Noor University, Tehran, Iran
LEAD_AUTHOR
Nader
Noroozi Pesyan
n.noroozi@urmia.ac.ir
2
Department of Organic chemistry, Faculty of chemistry, Urmia University, Urmia, 57159, Iran
AUTHOR
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ORIGINAL_ARTICLE
2,6-Pyridinedicarboxylic acid as an efficient and mild organocatalyst for the one-pot synthesis of xanthene derivative
Simple and efficient protocols have been developed for the one-pot synthesis of aryl-14H-dibenzo[a,j]xanthenes and 1,8-dioxo-octahydro-xanthenes. (i) A cost-effective, simple and convenient procedure for the synthesis of aryl-14H-dibenzo[a,j]xanthenes has been developed via a one-pot condensation from substituted benzaldehydes (1 equiv) and β-naphthol (2 equiv) in the presence of 2,6-pyridinedicarboxylic acid (2,6-PDCA) under solvent-free conditions. (ii) The one-pot condensation of substituted benzaldehydes (1 equiv) and 5,5-dimethyl-1,3-cyclohexanedione (dimedone) (2 equiv) in the presence of 2,6-pyridinedicarboxylic acid (2,6-PDCA) under solvent-free conditions leads to 1,8-dioxo-octahydro-xanthenes. In these protocols several advantages such as: Excellent yields, very short reaction times, easy work-up, simple methodology and ease of preparation and regeneration of the catalyst are offered. In these protocols several advantages such as: Excellent yields, very short reaction times, easy work-up, simple methodology and ease of preparation and regeneration of the catalyst are offered.
https://www.ajgreenchem.com/article_48679_01d910f4ef23de175d48167b51ea6ce1.pdf
2017-07-01
24
33
10.22631/ajgc.2017.92575.1005
2,6-PDCA
Organocatalyst
14-aryl-14H-dibenzo[a,j]xanthenes
1,8-dioxo-octahydro-xanthenes
Solvent-free conditions
Sobhan
Rezayati
sobhan.rezayati@gmail.com
1
Department of Chemistry, Payame Noor University, PO BOX 19395-4697 Tehran, Iran
LEAD_AUTHOR
Ehsan
Mirzajanzadeh
ehsan.m@yahoo.com
2
Department of Chemistry, Qaemshahr Branch, Islamic Azad University, Qaemshahr, Iran
AUTHOR
Hamed
Seifournia
hamed.seifournia@yahoo.com
3
Department of Chemistry, Qaemshahr Branch, Islamic Azad University, Qaemshahr, Iran
AUTHOR
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ORIGINAL_ARTICLE
Microwave-assisted multicomponent reaction for the synthesis of 2-amino-4H-chromene derivatives using ilmenite (FeTiO3) as a magnetic catalyst under solvent-free conditions
A green and highly efficient method has been developed for the synthesis of 2-amino-4H-chromene derivatives in the presence of FeTiO3 as magnetic catalyst via one-pot three-component condensation reaction of aromatic aldehydes, malononitrile and α- or β-naphthol without solvent under microwave irradiation. Mild reaction conditions, short reaction times, simple work-up, use of an economically convenient catalyst, and excellent product yields are the advantageous features of this method. The catalyst can be easily recovered by a simple magnetic separation and can be recycled six times with no significant loss of catalytic activity.
https://www.ajgreenchem.com/article_48570_9feda1eaf8db6576efedca84ec70f1bd.pdf
2017-07-01
34
40
10.22631/ajgc.2017.93142.1006
2-Amino-4H-chromenes
Ilmenite
Three-component reaction
Microwave irradiation
Saeid
Taghavi Fardood
saeidt64@gmail.com
1
Department of Chemistry, University of Zanjan, P.O. Box 45195-313, Zanjan, Iran
AUTHOR
Ali
Ramazani
aliramazani@yahoo.com
2
Department of Chemistry, University of Zanjan, P.O. Box 45195-313, Zanjan, Iran
LEAD_AUTHOR
Pegah
Azimzadeh Asiabi
3
Department of Chemistry, University of Zanjan, P.O. Box 45195-313, Zanjan, Iran
AUTHOR
Yousef
Bigdeli Fard
4
Department of Chemistry, Payame Noor University, PO BOX 19395-4697 Tehran, Iran
AUTHOR
Behrooz
Ebadzadeha
5
Department of Chemistry, University of Zanjan, P.O. Box 45195-313, Zanjan, Iran
AUTHOR
[1]. Kazemizadeh A.R., Ramazani A. Curr. Org. Chem., 2012, 16:418
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ORIGINAL_ARTICLE
Synthesis of polyol esters by p-toluenesulfonic acid catalyst as synthetic lubricant oils
Esterification and transesterification reactions usually carry out in hydrocarbon solvents, such as toluene. Homogeneous acid catalysts such as, sulfuric acid, methane sulfonic acid, and p-toluene sulfonic acid are the most conventional catalysts for this purpose. Application of these catalysts causes some difficulties such as corrosion, and environment probleA most effective and less energy demanding method of producing fatty esters, polyol esters , by esterifying fatty acids, with a pentaerythritol and trimethylolpropan alcohols in the presence of an acid Catalyst at elevated temperature wherein an azeotroping agent , particularly toluene, is used to facilitate continuous removal of water by distillation, formed as a by-product during the esterification reaction.The esterification reaction is completed within 5 hours, pentaerythritol and trimethylolpropan esters was produced .ms
https://www.ajgreenchem.com/article_48527_6174387956bdbae47b175de809869ee8.pdf
2017-07-01
41
45
10.22631/ajgc.2017.89392.1002
Polyol Esters
Pentaerythritol ester
Trimethylolpropan ester
Synthetic oil
Hadi
jabbari
hadijabbari@yahoo.com
1
Department of Management, Payam Noor University, Tehran, Iran
LEAD_AUTHOR
Nader
Noroozi Pesyan
nnp304@yahoo.com
2
Department of Organic chemistry, Faculty of chemistry, Urmia University, Urmia, 57159, Iran
AUTHOR
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ORIGINAL_ARTICLE
H-mordenite zeolite as an efficient, rapid and recyclable catalyst for chemoselective synthesis of 1,1-diacetates under solvent-free conditions
In this investigation H-Mordenite Zeolite has been shown to be an efficient, rapid, green, stable, Chemoselective and recyclable catalyst for the synthesis of 1, 1- diacetates (acylals) of various aromatic aldehydes under solvent- free conditions at room temperature. The main advantages of this protocol include low catalyst loading, shorter reaction time, excellent yields, eco-friendly, mild-condition, easy work-up procedures and reusable catalyst. This method must be useful in future for the synthesis of similar derivatives. The synthesized zeolite was characterized by various techniques via X-ray diffraction (XRD), Scanning Electronic microscopy (SEM), Fourier transform-infrared (FTIR spectroscopy) and Brunauer–Emmett–Teller (BET) surface area analysis. The synthesized reaction products were characterized by FTIR and 1H-NMR technique. Further investigation of the application of H-MOR zeolite for other reactions is ongoing in our laboratory.
https://www.ajgreenchem.com/article_49085_a08543b6b43b06956d4aee5f6d8bc939.pdf
2017-07-01
46
55
10.22631/ajgc.2017.92530.1003
H-mordenite Zeolite 1
1-diacetates
Aldehydes
Solvent-free conditions
Sami
Bhat
profsamibhat92@gmail.com
1
School of Studies in Chemistry, Jiwaji, University, Gwalior (M.P.)-474011 India
LEAD_AUTHOR
Rawoof Ahmad
Naikoo
naikraouf90@gmail.com
2
School of Studies in Chemistry, Jiwaji, University, Gwalior (M.P.)-474011 India
AUTHOR
Rayees
Ahmad Bhat
rayeesbinahad@gmail.com
3
School of Studies in Chemistry, Jiwaji, University, Gwalior (M.P.)-474011 India
AUTHOR
Manzoor Ahmad
Malla
manzoorju@gmail.com
4
School of Studies in Chemistry, Jiwaji, University, Gwalior (M.P.)-474011 India
AUTHOR
Radha
Tomar
professorsradhatomar@gmail.com
5
School of Studies in Chemistry, Jiwaji, University, Gwalior (M.P.)-474011 India
AUTHOR
Neeraj Kumar
Gatum
neerajkumar@gmail.com
6
School of Studies in Chemistry, Jiwaji, University, Gwalior (M.P.)-474011 India
AUTHOR
Kautilya Rao
Tiwari
kutilyatiwari@gmail.com
7
School of Studies in Chemistry, Jiwaji, University, Gwalior (M.P.)-474011 India
AUTHOR
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