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.

scholarly journals Synthesis and Characterization of Some Novel Oxazine, Thiazine and Pyrazol Derivatives

2016 ◽  
Vol 13 (2) ◽  
pp. 244-252
Author(s):  
Baghdad Science Journal
Keyword(s):  
Acetic Acid ◽  
Ir Spectra ◽  
Glacial Acetic Acid ◽  
Basic Medium ◽  
Synthesis And Characterization ◽  
Pyrazole Derivatives ◽  
Phenyl Hydrazine ◽  
H Nmr ◽  
Ft Ir

In this paper, some chalcone derivatives (C1, C2) were synthesized based on the reaction of equal amount of substituted acetophenone and substituted banzaldehyde in basic medium. Oxazine and thiazine derivatives were prepared from the reaction of chalcones (C1-C2) with urea and thiourea respectively in a basic medium. Pyrazole derivatives were prepared based on the reaction of chalcones with hydrazine mono hydrate or phenyl hydrazine in the presence of glacial acetic acid as a catalyst. The new synthesized compounds were identified using various physical techniques like1 H-NMR and FT-IR spectra.

Synthesis and characterization of novel optically active poly(ester-imide-imine)s

e-Polymers ◽  
2009 ◽  
Vol 9 (1) ◽  
Author(s):  
Abdol Reza Hajipour ◽  
Parniyan Roosta ◽  
Saeed Zahmatkesh ◽  
Arnold E. Ruoho
Keyword(s):  
Amino Acids ◽  
Acetic Acid ◽  
Glacial Acetic Acid ◽  
Optically Active ◽  
Synthesis And Characterization ◽  
Interfacial Polycondensation ◽  
Thermal Stabilities ◽  
Amino Phenol ◽  
High Yields

Abstract N,N´-(3,3´,4,4´-Benzophenonetetracarboxylic)-3,3´,4,4´-diimido-di-Lamino acids (1a-1d) and N,N´-pyromelliticdiimido-di-L-amino acids (2a-2d) are prepared from the reaction of 3,3´,4,4´-benzenetetracarboxylic-3,3´,4,4´- dianhydride or pyromellitic dianhydride with the corresponding L-amino acids in a solution of glacial acetic acid/pyridine (3:2) at refluxing temperature. 4-(4-((4- Hydroxyphenylimino)methyl)benzylidene amino) phenol (3) is prepared from 4- amino phenol and terephthaldialdehyde in refluxing ethanol. Interfacial polycondensation method was used to prepare the corresponding polymers (PEII1-8) in two immiscible solvents (water/dichloromethane). The resulting poly(esterimide- imine)s (PEIIs) having good inherent viscosities (0.13-1.25 dl g-1), optical activity and thermal stabilities is obtained in high yields.

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.

SYNTHESIS AND CHARACTERIZATION OF D-XYLOFURANOSE-5-PHOSPHATE

1955 ◽  
Vol 33 (4) ◽  
pp. 711-715 ◽  
Author(s):  
J. L. Barnwell ◽  
W. A. Saunders ◽  
R. W. Watson
Keyword(s):  
Acetic Acid ◽  
Glacial Acetic Acid ◽  
Synthesis And Characterization ◽  
Infrared Analysis ◽  
Barium Salt ◽  
Diphenyl Phosphate ◽  
Mild Hydrolysis

Phosphorylation of 1,2-O-isopropylidene-D-xylose with diphenylphosphoro-chloridate yielded crystalline 1,2-O-isopropylidene-D-xylofuranose-5-diphenyl-phosphate. Subsequent hydrogenolysis in glacial acetic acid over Adams' catalyst quantitatively removed phenyl groups as shown by infrared analysis. Mild hydrolysis in acetic acid for two hours at 80 °C. removed the isopropylidene grouping, and D-xylose-5-phosphate was isolated as an amorphous barium salt. A yield of 81% of theoretical was obtained from 1,2-O-isopropylidene-D-xylose, or an over-all yield of 72% from xylose. The product was characterized through its amorphous barium, disodium, and dipotassium salts, and its crystalline dibrucine and distrychnine salts.

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

Graphitic carbon nitride supported neodymium oxide as an efficient recyclable nanocatalyst for one-pot synthesis of diazabenzo[a]anthraceneones

2021 ◽  
Author(s):  
soraya Rahmatinejad ◽  
Hossein Naeimi
Keyword(s):  
Carbon Nitride ◽  
Neodymium Oxide ◽  
Solvent Free ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
One Pot ◽  
Efficient Catalyst ◽  
Free Condition ◽  
Solvent Free Condition

In this research, neodymium oxide@graphitic-carbon nitride nanocomposite was prepared and used as an efficient catalyst for synthesis of some diazabenzo[a]anthraceneones under solvent-free condition. Characterization of Nd2O3@g-C3N4 nanocomposite was carried out...

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