scholarly journals Synthesis of Chlorinated 3,5 Diaryl 2 Pyrazrolines

2021 ◽  
pp. 476-479
Author(s):  
Pratiksha S. Rathod ◽  
Shilpa G. Chavan
Keyword(s):  
1H Nmr ◽  
Elemental Analysis ◽  
Heterocyclic Compounds ◽  
Mass Spectra ◽  
Biological Activities ◽  
Research Activity ◽  
Biological Screening ◽  
Pharmaceutical Applications

Pyrazolines are important nitrogen containing 5-membered heterocyclic compounds. Various, pyrazoline derivatives have been found to possess considerable biological and pharmaceutical applications as activities, which stimulated the research activity in this field. The chlorinated 3,5-diary-l-2-pyrazolines has been synthesized by reaction of appropriately substituted chloro chalcones and mono-substituted hydrazine’s have been synthesized. These compounds were characterized using IR, 1H-NMR and Mass spectra and Elemental analysis. They possess some potent biological activities. Therefore, biological screening of novel compounds has been also done.

Synthesis and Anticonvulsant Activity of 3-(alkylamino, alkoxy)-1,3,4,5- Tetrahydro-2H-benzo [b] azepine-2-one Derivatives

2018 ◽  
Vol 17 (6) ◽  
pp. 448-457 ◽  
Author(s):  
Xia Huang ◽  
Tie Chen ◽  
Rong-Bi Han ◽  
Feng-Yu Piao
Keyword(s):  
1H Nmr ◽  
Elemental Analysis ◽  
13C Nmr ◽  
Anticonvulsant Activity ◽  
Mass Spectra ◽  
Maximal Electroshock ◽  
Test Compound ◽  
Maximal Electroshock Test ◽  
Mes Test ◽  
Structure Activity

Background & Objective: A series of novel 3-Substituted-1,3,4,5-Tetrahydro-2H-benzo [b] azepine-2-one Derivatives (4, 5, 7, 10, 12, 5a-j, 8a-e) were synthesized from 1,2,3,4-Tetrahydro-1- naphthalenone. The structures of these compounds were confirmed by IR, 1H NMR, 13C NMR, MASS spectra and elemental analysis. Their anticonvulsant activity was evaluated by the maximal electroshock (MES) test, subcutaneous pentylenetetrazol (scPTZ) test, and their neurotoxicity was evaluated by the rotarod neurotoxicity test. Compound 4 showed the maximum anticonvulsant activity against the maximal electroshock test (ED50=26.4, PI =3.2) and against the subcutaneous pentylenetetrazol test (ED50=40.2, PI =2.1). Conclusion: Possible structure-activity relationship was discussed.

scholarly journals Green Synthesis andIn VitroBiological Evaluation of Heteroaryl Chalcones and Pyrazolines of Medicinal Interest

2013 ◽  
Vol 2013 ◽  
pp. 1-4 ◽  
Author(s):  
Vishal Banewar
Keyword(s):  
Green Synthesis ◽  
Elemental Analysis ◽  
Broad Spectrum ◽  
Spectroscopic Data ◽  
Heterocyclic Compounds ◽  
Biological Activities ◽  
Biological Evaluation ◽  
Active Compounds

Pyrazolines are well known and important nitrogen containing 5-membered heterocyclic compounds. In the present investigation, a series of various heteroaryl chalcones and pyrazolines were synthesized by condensing formylquinolines with diverse ketones. The newly synthesized 2-pyrazolines were characterized on the basis of elemental analysis and spectroscopic data. All of the newly synthesized target compounds were selected by the NCI forin vitrobiological evaluation. These active compounds exhibited broad spectrum of various biological activities. Most of the compounds showed potent activity.

scholarly journals SYNTHESIS AND BIOLOGICAL ACTIVITIES EVALUATION OF SOME NEW SPIRO 1,2,4-TRIAZOLE DERIVATIVES HAVING SULFONAMIDE MOIETY

2015 ◽  
Vol 23 (23) ◽  
pp. 49-59
Author(s):  
Hany M. Dalloul ◽  
Khaled El-nwairy ◽  
Ali Z. Shorafa ◽  
Ahmed Abu Samaha
Keyword(s):  
1H Nmr ◽  
Elemental Analysis ◽  
13C Nmr ◽  
Sulfonic Acid ◽  
Spectroscopic Data ◽  
Biological Activities ◽  
Cyclic Ketones ◽  
Triazole Derivatives ◽  
Toluene Sulfonic Acid

A series of new spiro 1,2,4-triazoles V-IXa-j were synthesized by the reaction of appropriate amidrazones IV with cyclic ketones in the presence of p-toluene sulfonic acid as a catalyst. The structures of the synthesized compounds have been confirmed by the elemental analysis and spectroscopic data (IR, 1H NMR, 13C NMR and MS). The microbial features of the synthesized compounds were studied using well-established methods from the literature.

Utility of Diketone in Heterocyclic Synthesis: Synthesis of New Substituted Pyrimidines and Fused Pyrimidine of Potential Biosignificant Interest

2018 ◽  
Vol 15 (8) ◽  
pp. 1171-1181 ◽  
Author(s):  
Mohamed A.M.A. Reheim ◽  
Ibrahim S.A. Hafiz ◽  
Hend S.E.A. Rady
Keyword(s):  
1H Nmr ◽  
Elemental Analysis ◽  
Nmr Spectra ◽  
Chemical Shifts ◽  
Biological Activities ◽  
1H Nmr Spectra ◽  
Internal Reference ◽  
Aluminum Sheets ◽  
Layer Chromatography

Aim and Objective: In this study, a new series of iminopyrimidine derivatives were synthesized from the reaction of the key intermediate 2-imino-6-phenyl-2,3-dihydropyrimidin-4(5H)-one 4 with a variety of electrophilic and nucleophilic reagents under a variety of mild conditions. The structures of the newly synthesized compounds were characterized on the basis of their elemental analysis and spectroscopic data. The antimicrobial activity of this series was evaluated in vitro and they showed either weak or moderate activities. Materials and Methods: All melting points were measured using Akofler Block instrument and are uncorrected. IR spectra (KBr) were recorded on FTIR 5300 spectrometer (υ, cm-1). The 1H NMR spectra were recorded on a Varian Gemini spectrometer. The 1H NMR spectra were run at 400 MHz and 13C NMR spectra were run at 100 MHz in DMSO-d6 as a solvent. The chemical shifts are expressed in parts per million (ppm) by using tetramethylsilane (TMS) as an internal reference. 1000 EX mass spectrometer at 70 eV. The purity of synthesized compounds was checked by Thin Layer Chromatography (TLC) (aluminum sheets) using n-hexane, ethyl acetate (7:3, V/V) eluent. Elemental analysis was carried out by the Microanalytical Research Center, Faculty of Science, and Microanalytical Unit, Faculty of Pharmacy, Cairo University, Egypt. Conclusion: In conclusion, compounds 4, 5 and 12 were used as efficient precursors for the synthesis of new heterocycles including 2-imino-2,3-dihydropyrimidine moiety with expected biological activities.

New Heterocyclic Compounds from 1,2,4-triazoles Class with Potential Cytotoxic Activity

2017 ◽  
Vol 68 (11) ◽  
pp. 2503-2508 ◽  
Author(s):  
Laura Ileana Socea ◽  
Stefania Felicia Barbuceanu ◽  
Bogdan Socea ◽  
Constantin Draghici ◽  
Theodora Venera Apostol ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Cytotoxic Activity ◽  
Spectral Data ◽  
1H Nmr ◽  
Elemental Analysis ◽  
13C Nmr ◽  
Heterocyclic Compounds ◽  
Cytotoxic Effect ◽  
13C Nmr Spectroscopy ◽  
New Compounds

Acylhydrazinecarbothioamides (2a,b) were synthesized by addition of 2-(5H-dibenzo[a,d][7]annulen-5-yl)acetohydrazide to different isothiocyanates. The new 1,2,4-triazol-3-thioles (3a,b) were synthesized by cyclization of new 2- acylhydrazinecarbothioamides (3a,b) in basic media. Alkylation of 1,2,4-triazole-3-thiols (3a-c) with ethyl bromide gave only S-substituted derivatives (4a-c). The structures of the synthesized compounds have been established on spectral data (IR, 1H-NMR and 13C-NMR spectroscopy) and elemental analysis. The cytotoxic effect of new compounds was evaluated using two alternative models on plant and invertebrate organisms.

scholarly journals Tetracyclic Heteroaromatic Systems-Synthesis of Ethoxycarbonylphenylpyrido[3',2':5,6] Thiopyranoquinolines

2021 ◽  
Vol 64 (3) ◽  
pp. 191-194
Author(s):  
Muhammad Naeem Khan ◽  
Misbahul Ain Khan ◽  
Noreen Aslam ◽  
Pir Bakhsh Khan ◽  
Ehsan ul Haq
Keyword(s):  
1H Nmr ◽  
Elemental Analysis ◽  
Mass Spectra ◽  
Ethyl Pyruvate ◽  
Analysis Data ◽  
Elemental Analysis Data

7-benzylideneamino-5H-thiochromeno[2,3-b]pyridin-5-ones and 9-benzylideneamino-5H-thio- chromeno[2,3-b]pyridin-5-ones, on reaction with ethyl pyruvate to afford 1-ethoxycarbonyl-3-phenyl-12H- pyrido[3',2':5,6]thiopyrano[3,2-f]quinoline-12-ones and 4-ethoxycarbonyl-2-phenyl-7H- pyrido[3',2':5,6]thiopyrano[3,2-h]quinoline-7-ones respectively by the two different methods. These products were precipitated by addition of ethanol, water (1:1), were purified by recrystalizing from appropriate solvents and were characterized from their IR, 1H-NMR, mass spectra and elemental analysis data.  

scholarly journals Synthesis, Identification and Biological Activity of New Heterocyclic Compounds from Reaction of New Schiff-Bases with Phathalic Anhydride

2020 ◽  
Vol 8 (1) ◽  
pp. 12-18
Author(s):  
Alya A. Dawood ◽  
Shireen R. Mmohammed ◽  
Mohammed Mahmoud
Keyword(s):  
Acetic Acid ◽  
Schiff Bases ◽  
Heterocyclic Compounds ◽  
Mass Spectra ◽  
Glacial Acetic Acid ◽  
Biological Activities ◽  
Condensation Reaction ◽  
Aromatic Aldehydes ◽  
Heterocyclic Ring ◽  
Second Step

Series of new Schiff bases and their derivatives (Oxazepine) have been synthesized during two steps. The first step synthesis of imines derivatives (1-10) by the condensation reaction of 1, 7-diaminohepatane and 1,8-diaminooctane with different substituted aromatic aldehydes by using glacial acetic acid as catalyst. The second step includes reaction of the prepared Schiff bases derivatives with phathalic anhydride in dry benzene to obtain   seven-membered heterocyclic ring derivatives (11-15).  The biological activities of some prepared compounds were also studied against different kinds of bacteria. The new derivatives were confirmed by suing a range of experimental techniques including 1HNMR, 13C NMR, IR and Mass spectra.

New heterocyclic compounds from 1,2,4-trizoles and 1,3,4-oxadiazoles class containing 5H-dibenzo[a,d][7]annulene moiety

2018 ◽  
Vol 68 (12) ◽  
pp. 2761-2764
Author(s):  
Laura Ileana Socea ◽  
Stefania Felicia Barbuceanu ◽  
Constantin Draghici ◽  
George Mihai Nitulescu ◽  
Gabriel Saramet ◽  
...  
Keyword(s):  
1H Nmr ◽  
Elemental Analysis ◽  
13C Nmr ◽  
Heterocyclic Compounds ◽  
Alkaline Media ◽  
Mercury Oxide ◽  
New Compounds

In this paper we present the synthesis of the new heterocyclic compounds with 5H-dibenzo[a,d][7]annulene moiety obtained by cyclization of 2-acylhydrazinecarbothioamides (2a,b). The acylhydrazinecarbothioamides were obtained by treating 2-(5H-dibenzo[a,d][7]annulen-5-yl)acetohydrazide (1) with 2,5-difluorophenyl or 3-bromophenyl isothiocyanates. 2-Amino-1,3,4-oxadiazoles (3a,b) were synthesized by cyclization of 2- acylhydrazinecarbothioamides in the presence of mercury oxide. The new 1,2,4-triazole-3-thioles (4a,b) were synthesized by cyclization, in alkaline media, of the corresponding acylhydrazinecarbothioamide. The structures of the new compounds synthesized were investigated by 1H-NMR, 13C-NMR, IR and elemental analysis.

scholarly journals Synthesis, Characterization and Biological Activity of (E)-9-Benzylidene-5-phenyl-5,6,7,8,9,10-hexahydro-[1,2,4]triazolo[3,4-ɑ]quinazoline

2020 ◽  
Vol 15 (3) ◽  
pp. 111-118
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Biological Activity ◽  
Carbonyl Compound ◽  
1H Nmr ◽  
Elemental Analysis ◽  
Heterocyclic Compounds ◽  
Bacterial Activity ◽  
Favorable Effect ◽  
Unsaturated Carbonyl Compound ◽  
Quinazoline Derivatives

Abstract: Novel quinazoline derivatives were synthesized viathe reaction of unsaturated carbonyl compound subsidiaries with 3-aminotriazole. These compounds are convenient and important intermediates for the synthesis of a rangeof useful and novel heterocyclic compounds. The structures of these compounds were characterized using elemental analysis and IR, 1H NMR and mass spectroscopic methods.They were also tested with respect to their anti-bacterial activity against two types of bacteria,Staphylococcus aureusand Pseudomonas aeruginosa. Significant anti-bacterial activity was observed,and the results indicate the favorable effect of electron-releasing substituents on anti-bacterial activity

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