An Easy and Efficient Method for the Synthesis of Quinoxalines Using Recyclable and Heterogeneous Nanomagnetic‐Supported Acid Catalyst under Solvent‐Free Condition

2018 ◽  
Vol 3 (18) ◽  
pp. 5228-5232 ◽  
Author(s):  
Kachigere B. Harsha ◽  
Shobith Rangappa ◽  
Habbanakuppe D. Preetham ◽  
Toreshettahally R. Swaroop ◽  
Maryam Gilandoust ◽  
...  
Keyword(s):  
Efficient Method ◽  
Acid Catalyst ◽  
Solvent Free ◽  
Free Condition ◽  
Solvent Free Condition

scholarly journals An Efficient Method for Synthesis of N-tert-Butyl Amides Using Oxalic Acid Dihydrate in Solvent-Free Condition

2014 ◽  
Vol 2014 ◽  
pp. 1-4
Author(s):  
Masoud Mokhtary ◽  
Seyedeh Khadijeh Nasernezhad
Keyword(s):  
Oxalic Acid ◽  
Efficient Method ◽  
Butyl Acetate ◽  
Solvent Free ◽  
Free Condition ◽  
Oxalic Acid Dihydrate ◽  
Tert Butyl ◽  
Solvent Free Condition

An efficient method for the synthesis of N-tert-butyl amides by reaction of nitriles with tert-butyl acetate or tert-butanol is described using oxalic acid dihydrate in solvent-free condition. The result showed that tert-butyl acetate served as a relatively better source of tert-butyl carbocation than tert-butanol.

ChemInform Abstract: A New Solid Acid Catalyst FeCl3/Bentonite for Aldol Condensation under Solvent-Free Condition.

ChemInform ◽  
2016 ◽  
Vol 47 (26) ◽  
Author(s):  
I. Muthuvel ◽  
S. Dineshkumar ◽  
K. Thirumurthy ◽  
S. Rajasri ◽  
G. Thirunarayanan
Keyword(s):  
Solid Acid ◽  
Aldol Condensation ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Solvent Free ◽  
Free Condition ◽  
Solvent Free Condition

Facile transesterification of β-ketoesters under solvent-free condition using borate zirconia solid acid catalyst

2004 ◽  
Vol 5 (7) ◽  
pp. 353-357 ◽  
Author(s):  
B.R. Madje ◽  
P.T. Patil ◽  
S.S. Shindalkar ◽  
S.B. Benjamin ◽  
M.S. Shingare ◽  
...  
Keyword(s):  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Solvent Free ◽  
Free Condition ◽  
Solvent Free Condition

scholarly journals Synthesis and Characterization of Novel Biginelli Dihydropyrimidinone Derivatives Containing Imidazole Moiety

2019 ◽  
Vol 2019 ◽  
pp. 1-7 ◽  
Author(s):  
Mashooq Ahmad Bhat ◽  
Mohamed A. Al-Omar ◽  
Ahmed M. Naglah ◽  
Atef Kalmouch ◽  
Abdullah Al-Dhfyan
Keyword(s):  
Acetic Acid ◽  
Elemental Analysis ◽  
Efficient Method ◽  
Glacial Acetic Acid ◽  
Solvent Free ◽  
Synthesis And Characterization ◽  
Spectroscopic Methods ◽  
Free Condition ◽  
Solvent Free Condition

Enaminone, (2E)-1-[4-(1H-imidazol-1-yl) phenyl]-4-methylpent-2-en-1-one (II) was synthesized by refluxing 1-[4-(1H-imidazol-1-yl) phenyl] ethan-1-one (I) with dimethylforamide dimethylacetal (DMF–DMA) under solvent-free condition for 12 hours. Finally, the dihydropyrimidinone derivatives containing imidazole moiety (1–15) were obtained by reacting enaminone, (2E)-1-[4-(1H-imidazol-1-yl) phenyl]-4-methylpent-2-en-1-one (II) with urea and different substituted benzaldehydes in the presence of glacial acetic acid. Dihydropyrimidinone derivatives containing imidazole moiety were synthesized in excellent yield by means of a simple and efficient method. All the compounds were confirmed by elemental analysis. The structures of all the compounds were confirmed by modern spectroscopic methods.

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