Log in

Relevant bibliographies by topics / Sulphonic acid derivatives / Journal articles

To see the other types of publications on this topic, follow the link: Sulphonic acid derivatives.

Journal articles on the topic 'Sulphonic acid derivatives'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Sulphonic acid derivatives.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Sakhare, N. D., S. J. Takate, J. R. Deshmukh, D. P. Waghmode, and S. D. Mhaske. "An Efficient Synthesis of Quinoline Derivatives using Polymer-Supported Sulphonic Acid via Friendlier Pathway: A Green Protocol." Asian Journal of Chemistry 37, no. 4 (2025): 789–94. https://doi.org/10.14233/ajchem.2025.33390.

Full text

Abstract:

An efficient method for synthesizing quinoline derivatives (3a-l) was reported using polyethylene glycol-based sulphonic acid (PEG-SA) and polystyrene-supported polyethylene glycol-based sulphonic acid (PS-PEG-SA) as recyclable catalysts via a friendlier reaction pathway. This strategy is more environmentally sustainable than traditional methods for synthesizing quinoline derivatives, yielding favorable yields and facilitating ease of operation under mild reaction conditions. In presence of PEG-SA/PS-PEG-SA catalyst, carbonyl compounds with an active α-methylene group were added to 2-aminophen

APA, Harvard, Vancouver, ISO, and other styles

2

Poomathi, Nataraj, Sivakalai Mayakrishnan, Doraiswamy Muralidharan, Rajagopal Srinivasan, and Paramasivan T. Perumal. "Reaction of isatins with 6-amino uracils and isoxazoles: isatin ring-opening vs. annulations and regioselective synthesis of isoxazole fused quinoline scaffolds in water." Green Chemistry 17, no. 6 (2015): 3362–72. http://dx.doi.org/10.1039/c5gc00006h.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

El-Dossoki, Farid I. "Protonation and Solvation Thermodynamics of Some Naphthol Derivatives in KCl Aqueous Solution of Different Ionic Strengths." Journal of Chemistry 2016 (2016): 1–8. http://dx.doi.org/10.1155/2016/7234320.

Full text

Abstract:

The acid-base properties of naphthalen-1-ol (L1), naphthalene-1,5-diol (L2), and 4-amino-3-hydroxynaphthalene-1-sulphonic acid (L3) were characterized from pH-metric measurements in pure water and in different concentrations (0–4 mol kg−1) of aqueous KCl solutions at the temperature range ofT= (293.15 to 213.15) K at 5 K intervals. The results reveal that naphthalen-1-ol and naphthalene-1,5-diol molecules have two ionisable protons (of the hydroxyl groups) while 4-amino-3-hydroxynaphthalene-1-sulphonic acid has three ionisable protons (hydrogen ion of the hydroxyl group, SO3H, andNH3+). Modeli

APA, Harvard, Vancouver, ISO, and other styles

4

Jayanthi, Murugan, Perumal Venkatesh, and Sathiravada Veeraswamy Thirunavukkarasu. "A novel and efficient synthesis of 1, 2, 3,4-tetrahydropyrimidine carboxamide derivatives by Biginelli reaction and their in vitro antibacterial activity." Biomedicine 42, no. 2 (2022): 280–85. http://dx.doi.org/10.51248/.v42i2.884.

Full text

Abstract:

Introduction and Aim: An efficient aspect of two step synthesis of tetrahydro pyrimidine carboxamide derivatives were developed by Biginelli reaction. The two-step synthesized 1,2,3,4-tetrahydropyrimidinecarboxamide compounds were evaluated by In-vitro studies like antifungal and bacterial activities. Few compounds were shown excellent zone of inhibition against fungal and Microbial activities. In this study showed significant effect of antifungal and bacterial action against tetrahydro pyrimidine derivatives. Materials and Methods: In this procedure to synthesize 1,2,3,4-tetrahydropyrimidinec

APA, Harvard, Vancouver, ISO, and other styles

5

Alshabanah, Latifah A., Laila A. Al-Mutabagani, Sobhi M. Gomha, Hoda A. Ahmed, Saheed A. Popoola, and Mohamed Shaban. "Novel sulphonic acid liquid crystal derivatives: experimental, computational and optoelectrical characterizations." RSC Advances 11, no. 45 (2021): 27937–49. http://dx.doi.org/10.1039/d1ra02517a.

Full text

Abstract:

A novel liquid crystal homologous series based on the benzene sulphonic acid moiety, namely (E)-4-((4-((4-(alkoxy)benzoyl)oxy)benzylidene)amino)benzenesulfonic acid (Sn), was synthesized and examined via different experimental and theoretical measurements.

APA, Harvard, Vancouver, ISO, and other styles

6

Singh, Vineet Kumar, and Amrita Parle. "Synthesis, Characterization and Antioxidant Activity of 2-Aryl Benzimidazole Derivatives." Asian Journal of Pharmaceutical Research and Development 8, no. 2 (2020): 35–44. http://dx.doi.org/10.22270/ajprd.v8i2.582.

Full text

Abstract:

Objective: To synthesize benzimidazole derivatives, characterize them by 1HNMR and ATIR techniques and evaluate their antioxidant activity. Methods: In the present study 19 benzimidazole derivatives were synthesized by reacting O-phenylenediamine as the primary reactant with different aromatic aldehydes and benzoic acids. Reactions were monitored using thin layer chromatography technique, and the newly synthesized derivatives were characterized by ATIR and 1HNMR techniques. The antioxidant assay was performed using ABTS [2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid)] method and

APA, Harvard, Vancouver, ISO, and other styles

7

Amin, Shaista, and Amrita Parle. "SYNTHESIS, CHARACTERIZATION AND ANTIOXIDANT ACTIVITY OF 2-ARYL BENZOTHIAZOLE DERIVATIVES." International Journal of Current Pharmaceutical Research 10, no. 5 (2018): 3. http://dx.doi.org/10.22159/ijcpr.2018v10i5.29685.

Full text

Abstract:

Objective: To synthesize benzothiazole derivatives, characterize them by 1HNMR and ATIR techniques and evaluate for their antioxidant activity.Methods: In the present study 12 benzothiazole derivatives were synthesized by reacting 2-chloronitro benzene as the primary reactant with different aromatic aldehydes and benzoic acids. Reactions were monitored using thin layer chromatography technique, and the newly synthesized derivatives were characterized by ATIR and 1HNMR techniques. The antioxidant assay was performed using 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) or ABTS method an

APA, Harvard, Vancouver, ISO, and other styles

8

Hao Zang, Hao Zang, Qian Xu Qian Xu, Luyun Zhang Luyun Zhang, Guangqing Xia Guangqing Xia, and Jiaming Sun and Junyi Zhu Jiaming Sun and Junyi Zhu. "Synthesis and Biological Activities of Hydroxytyrosol Ester Derivatives." Journal of the chemical society of pakistan 42, no. 1 (2020): 109. http://dx.doi.org/10.52568/000610.

Full text

Abstract:

A series of hydroxytyrosol (HT) derivatives were synthesized by modification of alcohol hydroxyl group of HT, twenty-five target compounds were obtained and characterized by NMR and HRMS. The antioxidant activities of those compounds were evaluated in three different assays. Except 3e and 3y, all other compounds demonstrated significant 2,2and#39;-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) free radical cation scavenging activity ranging from IC50 3.4 to 24.4 μM, which were more potent than L-ascorbic acid (IC50=24.8 μM). Compounds 3b-3d, 3f-3k, 3m-3x were better than Trolox (18.

APA, Harvard, Vancouver, ISO, and other styles

9

Hao Zang, Hao Zang, Qian Xu Qian Xu, Luyun Zhang Luyun Zhang, Guangqing Xia Guangqing Xia, and Jiaming Sun and Junyi Zhu Jiaming Sun and Junyi Zhu. "Synthesis and Biological Activities of Hydroxytyrosol Ester Derivatives." Journal of the chemical society of pakistan 42, no. 1 (2020): 109. http://dx.doi.org/10.52568/000610/jcsp/42.01.2020.

Full text

Abstract:

A series of hydroxytyrosol (HT) derivatives were synthesized by modification of alcohol hydroxyl group of HT, twenty-five target compounds were obtained and characterized by NMR and HRMS. The antioxidant activities of those compounds were evaluated in three different assays. Except 3e and 3y, all other compounds demonstrated significant 2,2and#39;-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) free radical cation scavenging activity ranging from IC50 3.4 to 24.4 μM, which were more potent than L-ascorbic acid (IC50=24.8 μM). Compounds 3b-3d, 3f-3k, 3m-3x were better than Trolox (18.

APA, Harvard, Vancouver, ISO, and other styles

10

R. Harish Kumar, D., and M. D. Karvekar. "Synthesis of Benzofuran Derivatives and their Evaluation of Antimicrobial Activity." E-Journal of Chemistry 7, no. 2 (2010): 636–40. http://dx.doi.org/10.1155/2010/817480.

Full text

Abstract:

2-Acetyl benzofuran (1) was synthesized by refluxing salicylaldehyde and dry chloroacetone in presence of potassium carbonate. The product formed was reacted with 2-aminobenzothiazole with catalystp-toluene sulphonic acid to formN-[(1Z)-1-(benzofuran-2-yl)ethylidene]1,3-benzothiazol-2-amine (2). In cold condition, Staudinger reaction was carried out for compound (2) with various acid chlorides in presence of triethylamine to synthesize 4-[1-benzofuran-2-yl]-1-[1, 3-benzothiazol-2-yl]-4-methylazetidin-2-one (3a-3j). All the synthesized compounds were characterized on the basis of analytical dat

APA, Harvard, Vancouver, ISO, and other styles

11

Parveen, Mehtab, Mohammad Azeem, Azmat Ali Khan, et al. "One-Pot Synthesis of Benzopyrano-Pyrimidine Derivatives Catalyzed by P-Toluene Sulphonic Acid and Their Nematicidal and Molecular Docking Study." Catalysts 12, no. 5 (2022): 531. http://dx.doi.org/10.3390/catal12050531.

Full text

Abstract:

A cost-effective and environmentally benign benzopyrano-pyrimidine derivative synthesis has been established with the condensation of different salicylaldehyde derivatives, piperidine/morpholine with malononitrile, in the presence of a catalyst containing p-toluene sulphonic acid (PTSA) at 80 °C temperature. This procedure offers a new and enriched approach for synthesizing benzopyrano-pyrimidine derivatives with high yields, a straightforward experimental method, and short reaction times. The synthesized compounds were investigated for their nematocidal activity, and the result shows that amo

APA, Harvard, Vancouver, ISO, and other styles

12

J. R. Deshmukh, U. N. Chaudhar, N.D. Sakhare, A. M. Patil, and S. G. Sonkamble. "A REUSABLE PHTHALIMIDE-N-SULPHONIC ACID (PISA) CATALYZED SYNTHESIS OF 2,3-DIHYDROQUINAZOLINONE DERIVATIVES: AN ECO-FRIENDLY PROTOCOL." RASAYAN Journal of Chemistry 18, no. 01 (2025): 461–67. https://doi.org/10.31788/rjc.2025.1819187.

Full text

Abstract:

We have developed a convenient and efficient strategy for the preparation of 2,3-dihydroquinazolin- 4(1H)- one derivative (DHQ) from condensation of 2-aminobenzamide and various aldehydes using phthalimide-N-sulfonic acid (PISA) as a catalyst is described. The present method has some important features such as mild reaction conditions, short reaction times, less catalyst dosage, and high yields with the green aspects by avoiding toxic catalysts and solvents.

APA, Harvard, Vancouver, ISO, and other styles

13

Droogmans, Guy, Chantal Maertens, Jean Prenen, and Bernd Nilius. "Sulphonic acid derivatives as probes of pore properties of volume-regulated anion channels in endothelial cells." British Journal of Pharmacology 128, no. 1 (1999): 35–40. http://dx.doi.org/10.1038/sj.bjp.0702770.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Khalikov, D. Kh, V. V. Semenov, L. Kh Pliyeva, and I. Ya Kalontarov. "Complex formation of iodine and 1-anilinonaphthalene-8-sulphonic acid with polymeric derivatives of ethinyl piperidol." Polymer Science U.S.S.R. 30, no. 7 (1988): 1608–13. http://dx.doi.org/10.1016/0032-3950(88)90453-4.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Gillani1, Syeda Shaista, Ehsan Ilahi Qureshi, and Munawar Ali Munawar. "Synthesis of Direct dyes based on non-carcinogenic amines for leather and textile industry." Lahore Garrison University Journal of Life Sciences 1, no. 04 (2017): 284–305. http://dx.doi.org/10.54692/lgujls.2017.0104142.

Full text

Abstract:

ABSTRACT: A series of direct dyes based on 4,4'-diaminodiphenylamine-2'-sulphonic acid (1-5) have been synthesized to be used as potential alternative to benzidine ( human carcinogenic) and they are eco-friendly. Benzidine derivatives containing alkoxy groups ortho to an amino group of meta-phenyl diamine removed carcinogenicity. The Benzidine analogue was diazotized and coupled with widely used dye intermediate dye like FC acid to generate a group of direct dyes giving yellow, mustard, blue, purple and greenish black shades on cotton, leather and wool. Dye structures were confirmed by visible

APA, Harvard, Vancouver, ISO, and other styles

16

Martinez, J. R., and S. Barker. "Inhibition of 36Cl uptake by stilbene sulphonic acid derivatives and loop diuretics in rat submandibular salivary acini." Archives of Oral Biology 34, no. 7 (1989): 535–40. http://dx.doi.org/10.1016/0003-9969(89)90092-7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Panwar, Hemant, and Shishupal Singh. "SYNTHESIS AND CHARACTERIZATION OF 3-ARYL-5H,13AH-QUINOLINO(3,2-F) (1,2,4)TRIAZOLO(4,3-B)(1,2-DIAZA-4-SULPHO)AZEPINES: IN VITRO ANTIFUNGAL AND ANTIBACTERIAL ACTIVITY." Indonesian Journal of Chemistry 11, no. 2 (2011): 148–53. http://dx.doi.org/10.22146/ijc.21402.

Full text

Abstract:

3-Aryl-5H,13aH-quinolino(3,2-f)(1,2,4)triazolo(4,3-b)(1,2-diaza-4-sulpho)azepines [2a-i] have been prepared by the cyclisation of 5-aryl-4-amino-3-mercapto-1,2,4-triazole by reaction with 2-chloro-3-formylquinoline in catalytic presence of p-toluene sulphonic acid. All the synthesized compounds have been characterized by elemental and spectral (IR, 1H- NMR and Mass) analysis. Furthermore, all compounds were evaluated for their antibacterial and antifungal activities against selected panel of pathogenic strains. Ampicillin trihydrate and fluconazole were used as standard drugs for antibacterial

APA, Harvard, Vancouver, ISO, and other styles

18

Gümrükçüoğlu, Nurhan, and Bahar Bilgin Sökmen. "Synthesis of oxadiazole substituted new carbazole derivatives as antioxidant and antiurease agent." European Journal of Biological Research 12, no. 2 (2022): 181–89. https://doi.org/10.5281/zenodo.6612440.

Full text

Abstract:

Heterocyclic compounds containing nitrogen together with an oxygen atom in their structures are an important class of medicinal chemistry compounds due to their interesting diverse biological applications. Some compounds including carbazole ring, which are aromatic organic compounds in tricyclic structure, show biological activity in a wide spectrum. Oxadiazole compounds attract the attention of many chemists thanks to their antibacterial, antitumor, anticancer, anti-viral, antimicrobial, anti-HIV, antituberculosis and antioxidant properties. In this study, new oxadiazole substituted carbazole

APA, Harvard, Vancouver, ISO, and other styles

19

Castillo, José, Gladys Escalona Motta, Vesna A. Eterović, and P. A. Ferchmin. "Succinyl derivatives of N-tris (hydroxymethyl) methyl-2-aminoethane sulphonic acid: their effects on the frog neuromuscular junction." British Journal of Pharmacology 84, no. 2 (1985): 275–88. http://dx.doi.org/10.1111/j.1476-5381.1985.tb12912.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Szczęśniak-Sięga, Berenika M., Jadwiga Maniewska, Benita Wiatrak, Tomasz Janek, Paulina Nowotarska, and Żaneta Czyżnikowska. "Anti-Inflammatory Properties of Novel 1,2-Benzothiazine Derivatives and Their Interaction with Phospholipid Model Membranes." Membranes 14, no. 12 (2024): 274. https://doi.org/10.3390/membranes14120274.

Full text

Abstract:

The design of novel anti-inflammatory drugs remains a critical area of research in the development of effective treatments for inflammatory diseases. In this study, a series of 1,2-benzothiazine was evaluated through a multifaceted approach. In particular, we investigated the potential interactions of the potential drugs with lipid bilayers, an important consideration for membrane permeability and overall pharmacokinetics. In addition, we evaluated their ability to inhibit cyclooxygenase 1 and cyclooxygenase 2 activity and selectivity using both a cyclooxygenase inhibition assay and molecular

APA, Harvard, Vancouver, ISO, and other styles

21

Elmi, Abdirahman, Fatouma Mohamed Abdoul-Latif, Rosella Spina, et al. "Aloe djiboutiensis: Antioxidant Activity, Molecular Networking-Based Approach and In Vivo Toxicity of This Endemic Species in Djibouti." Molecules 26, no. 10 (2021): 3046. http://dx.doi.org/10.3390/molecules26103046.

Full text

Abstract:

For the first time, the study of the antioxidant activity, the characterization of the phytoconstituants, and the evaluation of in vitro and in vivo toxicity of A. djiboutiensis leave and latex are performed. The antioxidant activity of both latex (ADL) and the methanolic extract of leaves (ADM) is determined using 1-diphenyl-2-picrylhydrazyl (DPPH), 2,2′-azino-bis 3-ethylbenzothiazoline-6-sulphonic acid (ABTS) scavenging radical methods and ferric reducing/antioxidant power (FRAP) assay. The phytochemical study of latex is done using Liquid Chromatography-Mass Spectrometry (LC-MS/MS) and a mo

APA, Harvard, Vancouver, ISO, and other styles

22

Yang, C. C., and L. S. Chang. "Studies on the status of lysine residues in phospholipase A2 from Naja naja atra (Taiwan cobra) snake venom." Biochemical Journal 262, no. 3 (1989): 855–60. http://dx.doi.org/10.1042/bj2620855.

Full text

Abstract:

Phospholipase A2 (PLA2) from Naja naja atra (Taiwan cobra) snake venom was subjected to lysine modification with trinitrobenzene sulphonic acid (TNBS), and two major trinitrophenylated (TNP) derivatives, TNP-1 and TNP-2, were separated by h.p.l.c. TNP-1 contained only one TNP group on Lys-6 and showed a marked decrease in enzymic activity, but still retained 45% of the lethal toxicity. Both Lys-6 and Lys-65 were modified in TNP-2, and modification of Lys-65 caused a further reduction of the lethal toxicity to 12.6%. However, the antigenicity of both TNP-1 and TNP-2 remained unchanged. The reac

APA, Harvard, Vancouver, ISO, and other styles

23

Stalmach, Angélique, William Mullen, Chifumi Nagai, and Alan Crozier. "On-line HPLC analysis of the antioxidant activity of phenolic compounds in brewed, paper-filtered coffee." Brazilian Journal of Plant Physiology 18, no. 1 (2006): 253–62. http://dx.doi.org/10.1590/s1677-04202006000100018.

Full text

Abstract:

Caffeoyl-, feruloyl- and dicaffeoylquinic acids (chlorogenic acids) in infusions from green and medium roasted coffee beans were identified and quantified by reverse phase HPLC with photodiode array and MS³ detection prior to assessment of the antioxidant activity using an HPLC system with post-column on-line antioxidant detection based on 2,2'-azinobis-3-ethylbenzothiazoline-6-sulphonic acid radical scavenging activity. Caffeoylquinic acids were the most abundant antioxidants and roasting induced isomerisation with a decline in 5-O-caffeoylquinic acid and concomitant increases in the 3- and 4

APA, Harvard, Vancouver, ISO, and other styles

24

Madelaine-Dupuich, C., J. Azema, B. Escoula, I. Rico, and A. Lattes. "Analysis of N-acyl aminonaphthalene sulphonic acid derivatives with potential anti-human immunodeficiency virus activity by thin-layer chromatography a." Journal of Chromatography A 653, no. 1 (1993): 178–80. http://dx.doi.org/10.1016/0021-9673(93)80409-2.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Moghanian, Hassan, Akbar Mobinikhaledi, and Maryam Deinavizadeh. "Efficient, one-pot synthesis of xanthene derivatives using boron sulphonic acid as a solid heterogeneous catalyst under solvent-free conditions." Research on Chemical Intermediates 41, no. 7 (2014): 4387–94. http://dx.doi.org/10.1007/s11164-014-1537-5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Koudjina, Simplice, John A. Agwupuye, Terkumbur E. Gber, et al. "Mechanistic Molecular Insights and Quantum Biological Properties of Methyl-Imidazole Derivatives as Potential Anticancer Agents." Asian Journal of Chemistry 37, no. 5 (2025): 1211–23. https://doi.org/10.14233/ajchem.2025.33290.

Full text

Abstract:

Methyl-imidazole derivatives are attracting considerable scientific attention because of their extensive and significant bioactivities. Hence, this work focuses on the investigation of the geometry, frontier molecular orbitals (FMOs), HOMO-LUMO energy gap, molecular docking, bioavailability, ADMET and pharmacokinetic properties of 1-(4-methoxyphenyl)-2,4,5-trimethyl-1H-imidazole (M1), 4-(4,5-dimethyl-1H-imidazol-1-yl)benzenesulfonic acid (M2), N-hydroxy-N-(4-(2,4,6-trimethyl-1H-imidazol-1-yl)phenyl)hydroxylamine (M3) and 2,4,5-trimethyl-1H-imidazole (M4) respectively, utilizing DFT at 6-311++g

APA, Harvard, Vancouver, ISO, and other styles

27

ABBAS, MUREED, SHUMAILA KIRAN, GHULAM HUSSAIN, TAHSIN GULZAR, and MIRZA NADEEM AHMAD. "Synthesis and characterization of novel resorcinol based trisazo reactive dye ligand and its different metal complexes for cotton dyeing." Industria Textila 73, no. 04 (2022): 460–67. http://dx.doi.org/10.35530/it.073.04.202251.

Full text

Abstract:

The goal of this study was to create a new trisazo reactive dye ligand from 6-nitro-2-aminophenol-4-sulphonic acid, resorcinol derivative, and vinyl sulphone para ester, as well as their metal complexes with Fe (II), Ni (II), Cu (II), and Zn (II). The diazotization of 6-nitro-2-aminophenol-4-sulphonic acid was followed by coupling to resorcinol in an alkaline medium for the synthesis of a mono-azo dye ligand. To make reactive dye, diazotized vinyl sulphone para ester was coupled with 6-nitro-2-aminophenol-4-sulphonic acid resorcinol derivative in an alkaline medium. Metal complexes of reactive

APA, Harvard, Vancouver, ISO, and other styles

28

Okoli, Bamidele, та Johannes Modise. "Investigation into the Thermal Response and Pharmacological Activity of Substituted Schiff Bases on α-Amylase and α-Glucosidase". Antioxidants 7, № 9 (2018): 113. http://dx.doi.org/10.3390/antiox7090113.

Full text

Abstract:

The emphasis of previous studies has targeted the development of insulin mimic with little attention given to the development of metabolic enzyme inhibitors. Our focus is to synthesise nine o-hydroxy and p-nitro-azomethine analogues, investigate their digestive enzyme inhibitory capacity, as well as the antioxidant and antimicrobial activities. The substituted Schiff bases were analysed using thermal gravimetric analyser (TGA), X-ray diffractometer (XRD), nuclear magnetic resonance spectroscopy (NMR), elemental analyser, and Fourier-transform infrared spectroscopy (FT-IR). Determination of syn

APA, Harvard, Vancouver, ISO, and other styles

29

Leporini, Mariarosaria, Monica Rosa Loizzo, Rosa Tundis, Chiara La Torre, Alessia Fazio, and Pierluigi Plastina. "Non-Pungent n-3 Polyunsaturated Fatty Acid (PUFA)-Derived Capsaicin Analogues as Potential Functional Ingredients with Antioxidant and Carbohydrate-Hydrolysing Enzyme Inhibitory Activities." Antioxidants 8, no. 6 (2019): 162. http://dx.doi.org/10.3390/antiox8060162.

Full text

Abstract:

N-Eicosapentaenoyl vanillylamine (EPVA) and N-docosahexaenoyl vanillylamine (DHVA), derived from n-3 polyunsaturated eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), respectively, were studied for their potential antioxidant and carbohydrate-hydrolysing enzyme inhibitory activities together with capsaicin and the corresponding n-3 polyunsaturated fatty acids (PUFAs). The antioxidant potential was evaluated by 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay, 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid (ABTS) assay, β-carotene bleaching test, and ferric reducing ability power (F

APA, Harvard, Vancouver, ISO, and other styles

30

Gola, Agnieszka, Magdalena Sacharczuk, and Witold Musiał. "Synthesis of AMPSA Polymeric Derivatives Monitored by Electrical Conductivity and Evaluation of Thermosensitive Properties of Resulting Microspheres." Molecules 24, no. 6 (2019): 1164. http://dx.doi.org/10.3390/molecules24061164.

Full text

Abstract:

Four stimuli-responsive polymers of N-isopropylacrylamide (NIPA) and 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPSA) and crosslinked derivatives by N,N′-methylene bisacrylamide (MBA) were synthesized: PNA, PAMPSA, PNAM, PAMPSAM. The effect of the cross-linker and methyl sulphonic acid (-CH3-SO3H) group on particle size, aggregation and volume phase transition temperature (VPTT) was investigated. Polymeric particles were synthesized via the surfactant free precipitation polymerization (SFPP) at 70 °C in the presence of cationic initiator 2,2′-azobis[2-methylpropionamidine] dihydrochloride

APA, Harvard, Vancouver, ISO, and other styles

31

Rosero, Johanna C., Silvia Cruz, Coralia Osorio, and Nelson Hurtado. "Analysis of Phenolic Composition of Byproducts (Seeds and Peels) of Avocado (Persea americana Mill.) Cultivated in Colombia." Molecules 24, no. 17 (2019): 3209. http://dx.doi.org/10.3390/molecules24173209.

Full text

Abstract:

The byproducts (seeds and peels) of an avocado cultivated in the south of Colombia were extracted with aqueous acetone and their antioxidant properties were measured with ABTS (2,2′-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) and DPPH (2,2-diphenyl-1-picrylhydrazyl) assays, and total polyphenol content was determined by Folin–Ciocalteu method. A bioguided fractionation was performed, first by SPE (solid phase extraction) on Amberlite XAD-7, and then by size exclusion chromatography on Sephadex LH-20. The polyphenolic-rich extracts and their fractions were analyzed by ultra-performance l

APA, Harvard, Vancouver, ISO, and other styles

32

Szabados-Furjesi, Peter, David Pajtas, Aliz Barta, et al. "Synthesis, in Vitro Biological Evaluation, and Oxidative Transformation of New Flavonol Derivatives: The Possible Role of the Phenyl-N,N-Dimethylamino Group." Molecules 23, no. 12 (2018): 3161. http://dx.doi.org/10.3390/molecules23123161.

Full text

Abstract:

Six new flavonols (6a–f) were synthesized with Claisen–Schmidt and Suzuki reactions and they were fully characterized by spectroscopic methods. In order to evaluate their antioxidant activities, their oxygen radical absorption capacity and ferric reducing antioxidant power were measured, along with their free radical scavenging activity against 2,2’-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) and 2,2-diphenyl-1-picrylhydrazylradicals. In addition, their cytotoxicity on H9c2 cardiomyoblast cells was also assessed by a 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay. Co

APA, Harvard, Vancouver, ISO, and other styles

33

Julianus Sohilait, Hanoch, and Healthy Kainama. "Free Radical Scavenging Activity of Essential Oil of Eugenia caryophylata from Amboina Island and Derivatives of Eugenol." Open Chemistry 17, no. 1 (2019): 422–28. http://dx.doi.org/10.1515/chem-2019-0047.

Full text

Abstract:

AbstractEssential oil from Eugenia caryophylata was normally used to heal many different deseaces. Various chemical compositions of essential oil distilled and steamed of Moluccas Eugenia caryophylata has been investigated by many different researchers. Even though an intensive research has been carried out of the local chemotypes, a very detail study has not been fully investigated to find out the complete chemical compounds from the plant essential oil and its content associated with their biological activities. In present paper, we assess the free radical scavenging of E. caryophylata colle

APA, Harvard, Vancouver, ISO, and other styles

34

Cerulli, Antonietta, Natale Badalamenti, Francesco Sottile, et al. "Phytochemical Profile and Functional Properties of the Husk of Argania spinosa (L.) Skeel." Plants 14, no. 15 (2025): 2288. https://doi.org/10.3390/plants14152288.

Full text

Abstract:

Due to the limited scientific exploration of Argania spinosa (L.) skeel husk, this study presents the first investigation of the metabolite profile of methanol and acetone extracts analyzed by liquid chromatography coupled with electrospray ionization and high-resolution multistage mass spectrometry (LC-ESI/HRMSMS). A total of 43 compounds, including hydroxycinnamic acid and flavonoid derivatives, saponins, and triterpenic acids, were identified, some of which have not been previously reported in this species. The total phenols (TPC) and flavonoids (TFC) content were spectrophotometrically det

APA, Harvard, Vancouver, ISO, and other styles

35

Fatisa, Yuni, Noval Herfindo, Fadila Aisyah, et al. "Efficient Synthesis using One-Pot Method and In Silico Analysis of Pyridazinone Derivatives as Inhibitor for Aldose Reductase Enzymes." Trends in Sciences 22, no. 4 (2025): 9396. https://doi.org/10.48048/tis.2025.9396.

Full text

Abstract:

This research aims to synthesize a series of pyridazinone derivatives (4a-4d, 5, 6a-6d), investigate their activities against the aldose reductase enzyme, and analyze their pharmacology profiles. Substituted-acetophenone were reacted with glyoxylic acid and hydrazine through a one-pot process using a heating reactor to obtain compounds 4a - 4d. Meanwhile, compounds 5 and 6a - 6d using a stirring technique, were synthesized combining compound 4d with p-chloro benzene sulphonic acid for compound 5 and combining compounds 4a - 4d with ethyl chloro acetate to produce compounds 6a - 6d. The MOE 202

APA, Harvard, Vancouver, ISO, and other styles

36

Rowe, F. M., Esther Levin, A. C. Burns, J. S. H. Davies та W. Tepper. "A New Reaction of Certain Diazosulphonates derived from β-Naphthol-1-sulphonic Acid leading to the Preparation of Phthalazine, Phthalazone, and Phthalimidine Derivatives". Journal of the Society of Dyers and Colourists 42, № 8 (2008): 242–48. http://dx.doi.org/10.1111/j.1478-4408.1926.tb01391.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Osman, Shahirah Atiqah, Norhani Norhani Abdullah, and Syahida Ahmad. "Antioxidant activity and phytochemical components of <i>Jatropha curcas</i> Linn. root extract." Journal of Biochemistry, Microbiology and Biotechnology 5, no. 2 (2017): 2–7. http://dx.doi.org/10.54987/jobimb.v5i2.340.

Full text

Abstract:

Jatropha curcas Linn. is a multipurpose plant in the Euphorbiaceae family. Numerous reportshave indicated the antioxidant properties of phenolics and flavonoids present in J. curcas rootmethanolic extract. In the present study, 80% methanolic extract of J. curcas root was preparedand used for extraction of bioactive compounds with five solvents (hexane, chloroform, ethylacetate, n-butanol and water) by liquid-liquid fractionation. The fractions were evaluated fortotal phenolic content (TPC), total flavonoid content (TFC) and antioxidant activities by usingthe 2-2â€™-diphenyl-1-picrylhydrazyl (

APA, Harvard, Vancouver, ISO, and other styles

38

Crocetti, Letizia, Gabriella Guerrini, Maria Paola Giovannoni, et al. "New Panx-1 Blockers: Synthesis, Biological Evaluation and Molecular Dynamic Studies." International Journal of Molecular Sciences 23, no. 9 (2022): 4827. http://dx.doi.org/10.3390/ijms23094827.

Full text

Abstract:

The channel protein Panx-1 is involved in some pathologies, such as epilepsy, ischemic stroke, cancer and Parkinson’s disease, as well as in neuropathic pain. These observations make Panx-1 an interesting biological target. We previously published some potent indole derivatives as Panx-1 blockers, and as continuation of the research in this field we report here the studies on additional chemical scaffolds, naphthalene and pyrazole, appropriately substituted with those functions that gave the best results as in our indole series (sulphonamide functions and one/two carboxylic groups) and in Panx

APA, Harvard, Vancouver, ISO, and other styles

39

Mistry, Rakesh N., and K. R. Desai. "Studies on Synthesis of Some Novel Heterocyclic Chalcone, Pyrazoline, Pyrimidine - 2 - One, Pyrimidine - 2 - Thione,para-Acetanilide Sulphonyl and Benzoyl Derivatives and their Antimicrobial Activity." E-Journal of Chemistry 2, no. 1 (2005): 30–41. http://dx.doi.org/10.1155/2005/953107.

Full text

Abstract:

1, 2 - Dichloro benzene on chlorosulphonation by chlorosulphonic acid gives 1, 2 - [dichloro] - benzene sulphonyl chloride which on condensation withp–amino acetophenone gives 1-[acetyl] - 1’ , 2’ - [dichloro] - dibenz sulphonamide derivative. This derivative undergo condensation with 2,4- dichloro benzaldehyde gives 1- [3” - (sub. phenyl) - 2” - propene - 1” - one] - 1’ , 2’ - [dichloro] - dibenz sulphonamide derivative which on reaction with 99% hydrazine hydrate and glacial acetic acid gives 1-[acetyl]-3- [1’ , 2’ - (dichloro) - dibenz sulphonamide] -5 - [2” , 4” - dichloro phenyl] - 2 - py

APA, Harvard, Vancouver, ISO, and other styles

40

A., M. AHDEL-HALIM, M. ABDEL-AZIZ R., ABDEL-NASSER G. та I. HASHEM A. "Synthesis of New Derivatives of β-Lactam-containing Antibiotics formed with certain Sulphonyl Chlorides". Journal of Indian Chemical Society Vol. 73, Nov 1996 (1996): 584–86. https://doi.org/10.5281/zenodo.5917630.

Full text

Abstract:

Chemistry Department, Faculty of Education, Ain Shams University, Roxy. Cairo. Egypt Research Department. EI-Nasr Pharmaceutical Chemical Company, Abu Zabal, Egypt Chemistry Department Faculty of Science, Ain-Shams University. Abasia, Cairo, Egypt <em>Manuscript received 17 November 1994. accepted 4 April 1915</em> 6-Aminopenicillanic acid and 7-aminodeacetoxycephalosporanic acid react with a number or sulphonyl chloride derivatives, including 4-acetylaminohenzenesulphonyl  chloride, phenylacetic acid-4-sulphonyl chloride and uracil-5-sulphonyl chloride to form new family of com

APA, Harvard, Vancouver, ISO, and other styles

41

Tzankova, Diana, Hristina Kuteva, Emilio Mateev, et al. "Synthesis, DFT Study, and In Vitro Evaluation of Antioxidant Properties and Cytotoxic and Cytoprotective Effects of New Hydrazones on SH-SY5Y Neuroblastoma Cell Lines." Pharmaceuticals 16, no. 9 (2023): 1198. http://dx.doi.org/10.3390/ph16091198.

Full text

Abstract:

A series of ten new hydrazide–hydrazone derivatives bearing a pyrrole ring were synthesized and structurally elucidated through appropriate spectral characteristics. The target hydrazones were assessed for radical scavenging activity through 1,1-diphenyl-2-picrylhydrazyl (DPPH) and 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) tests, with ethyl 5-(4-bromophenyl)-1-(2-(2-(4-hydroxy-3,5-dimethoxybenzylidene)hydrazine-yl)-2-oxoethyl)-2-methyl-1H-pyrrole-3-carboxylate (7d) and ethyl 5-(4-bromophenyl)-1-(3-(2-(4-hydroxy-3,5-dimethoxybenzylidene) hydra zine-yl)-3-oxopropyl)-2-methyl

APA, Harvard, Vancouver, ISO, and other styles

42

Maccarrone, Mauro, Almerinda Di Venere, Guus van Zadelhoff, et al. "Further structural and functional properties of mini‒lipoxygenase, an active fragment of soybean lipoxygenase-1." Spectroscopy 18, no. 2 (2004): 331–38. http://dx.doi.org/10.1155/2004/467417.

Full text

Abstract:

Lipoxygenases (Loxs) form a homologous family of non-heme, non-sulfur iron containing lipid-peroxidizing enzymes, which catalyze the dioxygenation of polyunsaturated fatty acids to the corresponding hydroperoxy derivatives. Soybean lipoxygenase-1 (Lox-1) is widely used as a prototype for studying the structural and functional properties of lipoxygenases. Tryptic digestion of soybean Lox-1 is known to produce a 60 kDa fragment, termed “mini-Lox”, which shows enhanced catalytic efficiency and higher membrane binding ability than the native enzyme (M. Maccarrone, M.L. Salucci, G. van Zadelhoff, F

APA, Harvard, Vancouver, ISO, and other styles

43

Khongkarat, Phanthiwa, Preecha Phuwapraisirisan, and Chanpen Chanchao. "Phytochemical content, especially spermidine derivatives, presenting antioxidant and antilipoxygenase activities in Thai bee pollens." PeerJ 10 (May 25, 2022): e13506. http://dx.doi.org/10.7717/peerj.13506.

Full text

Abstract:

Background Bee pollen (BP) is full of useful nutrients and phytochemicals.Its chemical components and bioactivities depend mainly on the type of floral pollen. Methods Monofloral BP from Camellia sinensis L., Mimosa diplotricha, Helianthus annuus L., Nelumbo nucifera, Xyris complanata, and Ageratum conyzoides were harvested. Crude extraction and partition were performed to yield solvent-partitioned extracts of each BP. Total phenolic content (TPC) was assayed by the Folin-Ciocalteu method, while the flavonoid content (FC) was measured by the aluminium chloride colorimetric method. Antioxidant

APA, Harvard, Vancouver, ISO, and other styles

44

Kosakowska, Olga, Katarzyna Bączek, Jarosław L. Przybył, et al. "Antioxidant and Antibacterial Activity of Roseroot (Rhodiola rosea L.) Dry Extracts." Molecules 23, no. 7 (2018): 1767. http://dx.doi.org/10.3390/molecules23071767.

Full text

Abstract:

Roseroot (Rhodiola rosea L.) belongs to plants revealing adaptogenic properties, which are attributed to the presence of specific phenolic compounds and are reflected mainly as antioxidant activity. The aim of the present study was to determine the antioxidant and antibacterial activity of various products obtained from R. rosea (underground organs as well as their aqueous and ethanolic dry extracts) in relation to the chemical profiles of phenolic and essential oil compounds. The chemical profiles were determined by High-performance Liquid Chromatography with a diode-array detector (HPLC-DAD)

APA, Harvard, Vancouver, ISO, and other styles

45

Schwartz, RS, JA Olson, C. Raventos-Suarez, et al. "Altered plasma membrane phospholipid organization in Plasmodium falciparum-infected human erythrocytes." Blood 69, no. 2 (1987): 401–7. http://dx.doi.org/10.1182/blood.v69.2.401.bloodjournal692401.

Full text

Abstract:

The intraerythrocytic development of the malaria parasite is accompanied by distinct morphological and biochemical changes in the host cell membrane, yet little is known about development-related alterations in the transbilayer organization of membrane phospholipids in parasitized cells. This question was examined in human red cells infected with Plasmodium falciparum. Normal red cells were infected with strain FCR3 or with clonal derivatives that either produce (K+) or do not produce (K-) knobby protuberances on the infected red cells. Parasitized cells were harvested at various stages of par

APA, Harvard, Vancouver, ISO, and other styles

46

Goyal, Rakesh, Mukesh Sharma, Dharmendra Ahuja, and Anurekha Jain. "Synthesis and Evaluation of Aldehyde Derivatives of Sulfonyl Chloride Quinoxaline." Journal of Drug Delivery and Therapeutics 9, no. 4-A (2019): 921–27. http://dx.doi.org/10.22270/jddt.v9i4-a.3142.

Full text

Abstract:

In pyrazine mesomeric interaction between the protonated & neutral nitrogen atoms probably destabilizes the cation.N, N’-diprotonation is very easier for pyrazine Synthesis of 2, 3-diphenylquinoxaline by phenylene-diamine in 16 ml of rectified spirit was added & combine solution was warm in water bath for 30 min. added water until slight colorless persist & allow to cool recrystallize the product in ethanol. Synthesis of 2, 3-diphenylquinoxaline 7-sulfonylchloride (R) using chlorosulfonic acid under ice-cold condition, then Synthesis of 2-hydroxyphenyl-2,3-diphenylquinoxaline-7-sul

APA, Harvard, Vancouver, ISO, and other styles

47

Sytar, Oksana, Paulina Bośko, Marek Živčák, Marian Brestic, and Iryna Smetanska. "Bioactive Phytochemicals and Antioxidant Properties of the Grains and Sprouts of Colored Wheat Genotypes." Molecules 23, no. 9 (2018): 2282. http://dx.doi.org/10.3390/molecules23092282.

Full text

Abstract:

The grains and sprouts of colored wheat genotypes (having blue, purple and yellow colored grains) contain specific anthocyanidins, such as pelargonidin and cyanidin derivatives, that produce beneficial health effects. The objective of the presented study is to compare the antioxidant capacity and contents of bioactive phytochemicals in grains and sprouts of wheat genotypes that differ in grain color. The methods α, α-diphenyl-β-picrylhydrazyl (DPPH) and 2,2′-azino-bis (3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) scavenging activities, together with spectrophotometrical and high-performance

APA, Harvard, Vancouver, ISO, and other styles

48

Schwartz, RS, JA Olson, C. Raventos-Suarez, et al. "Altered plasma membrane phospholipid organization in Plasmodium falciparum-infected human erythrocytes." Blood 69, no. 2 (1987): 401–7. http://dx.doi.org/10.1182/blood.v69.2.401.401.

Full text

Abstract:

Abstract The intraerythrocytic development of the malaria parasite is accompanied by distinct morphological and biochemical changes in the host cell membrane, yet little is known about development-related alterations in the transbilayer organization of membrane phospholipids in parasitized cells. This question was examined in human red cells infected with Plasmodium falciparum. Normal red cells were infected with strain FCR3 or with clonal derivatives that either produce (K+) or do not produce (K-) knobby protuberances on the infected red cells. Parasitized cells were harvested at various stag

APA, Harvard, Vancouver, ISO, and other styles

49

Zailan, Nur Fatin Zalikha, Seri Narti Edayu Sarchio, and Masriana Hassan. "Evaluation of Phytochemical Composition, Antioxidant and anti-Diabetic Activities of Mitragyna speciosa Methanolic Extract (MSME)." LABORATORY R_T 18, s21 (2022): 93–100. http://dx.doi.org/10.47836/mjmhs.18.s21.15.

Full text

Abstract:

Introduction: The therapeutic potential of plant-based or herbal medicine has been widely embraced by the public as a prevention and remedy for many illnesses. Mitragyna speciosa is one of the medicinal plant that exhibit the opioid-like effects of analgesia. This study aimed to evaluate the phytochemical content, antioxidant activity, and alpha-amylase enzyme inhibition of Mitragyna speciosa methanolic extract (MSME). Methods: The phytochemical composition of MSME was analyzed for secondary metabolites using UHPLC-TWIMS-QTOF-MS/MS. The total phenolic content (TPC), total flavonoid content (TF

APA, Harvard, Vancouver, ISO, and other styles

50

Batinić, Petar, Aleksandra Jovanović, Dejan Stojković, et al. "Phytochemical Analysis, Biological Activities, and Molecular Docking Studies of Root Extracts from Paeonia Species in Serbia." Pharmaceuticals 17, no. 4 (2024): 518. http://dx.doi.org/10.3390/ph17040518.

Full text

Abstract:

Without being aware of their chemical composition, many cultures have used herbaceous peony roots for medicinal purposes. Modern phytopreparations intended for use in human therapy require specific knowledge about the chemistry of peony roots and their biological activities. In this study, ethanol–water extracts were prepared by maceration and microwave- and ultrasound-assisted extractions (MAE and UAE, respectively) in order to obtain bioactive molecules from the roots of Paeonia tenuifolia L., Paeonia peregrina Mill., and Paeonia officinalis L. wild growing in Serbia. Chemical characterizati

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!