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Journal articles on the topic '3-a] penta cyclic phenothiazine'

Author: Grafiati

Published: 7 June 2025

Last updated: 2 August 2025

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1

Odin, E.M., S.A. Egu, and K.J. Okere. "Palladium Catalyzed Anilino Analogues of Angular Penta-Cyclic Phenothiazines: Novel Human Cholinesterases Inhibitors." Pharmaceutical and Chemical Journal 7, no. 2 (2020): 43–53. https://doi.org/10.5281/zenodo.13952327.

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The synthesis of novel 8-chloro12H- 5,14- di hydro- quinoxalino [2,3, a] – penta cyclic phenothiazine (16) and its anilino derivatives (18 a-h) are reported. The preparation followed the water-mediated catalyst pre-activation method as reported by Buchwald and co-workers. Structures were established by analytical and spectral data. The compounds (18 a-h) were evaluated for inhibitory potency against Acetylcholineesterase (AChE) and Butyrylchlolinesterase (BChE). The tested pentacyclic phenothiazines showed IC<sub>50</sub> values for both AChE and BChE in the range of 1.26 nM to 84.69 nM.

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2

Argiropoulos, G., LW Deady, and M. Dorkos. "Synthesis and Further Ring-Forming Reactions of a New 3-Amino-isoquinoline-4-carbaldehyde." Australian Journal of Chemistry 44, no. 3 (1991): 481. http://dx.doi.org/10.1071/ch9910481.

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The synthesis of 3-amino-6-(p- methylphenoxy )isoquinoline-4-carbaldehyde in two steps from the corresponding ethyl ester is reported. Further ring annulations by Friedlander synthesis are described to give, for example, new tetra- and penta -cyclic systems ( benzo [f] pyrimido [4,5-b][1,8] naphthyridine and benz [f] indolo [3,2-b][1,8] naphthyridine ).

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3

Ghalia, Mohamed H., Mohamed Abd El-Hamid, Mohamed A. Zweil, Abd El-Galil E. Amr, and Shimaa A. Moafi. "Synthesis and Reactions of New Chiral Linear and Macrocyclic Tetraand Penta-peptide Candidates." Zeitschrift für Naturforschung B 67, no. 8 (2012): 806–18. http://dx.doi.org/10.5560/znb.2012-0116.

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9a A series of linear and macrocyclic pentapeptide derivatives have been prepared via the coupling of pyridine-2,6-dicarboxylic acid (1) or pyridine-2,6-dicarbonyl dichloride (2) with appropriate amino acid methyl esters. The coupling of 1or 2with aminoacid methyl esters gave the corresponding pyridine dipeptide methyl esters 3, which were hydrolyzed with sodium hydroxide to the corresponding acids 4. The latter compounds 4were coupled with other amino acid methyl esters to afford the corresponding tetrapeptide esters 5, which were hydrolyzed with sodium hydroxide to the corresponding acids 6.

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4

Seo, Hyowon, Difan Zhang, and T. Alan Hatton. "Experimental and Virtual Screening of Phenazine and Phenothiazine Derivatives in Aqueous Solution for Electrochemical Carbon Capture." ECS Meeting Abstracts MA2023-01, no. 27 (2023): 1772. http://dx.doi.org/10.1149/ma2023-01271772mtgabs.

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Molecular redox-active compounds, including quinone and aza-aromatics, have emerged as tools for capturing carbon dioxide using renewable electricity. Given the vast and highly diverse chemical space of the candidate compounds, accessing their electrochemical properties in a rapid way is attractive for both experimental and virtual screening approaches. Here we present a study on the experimental screening of a series of commercial redox-active compounds. Phenazine and phenothiazine dyes have been experimentally tested for applications in electrochemical carbon capture, for which they are find

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5

Madar, Suresh F., Avinash C. Mendhe, Ahmedraza Mavazzan, et al. "Novel Phenothiazine and Coumarin based Sensitizers: Design, Synthesis and Photoelectrochemical Application by Anchoring on CdS Nanowires." Asian Journal of Chemistry 36, no. 5 (2024): 1142–50. http://dx.doi.org/10.14233/ajchem.2024.31400.

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Novel metal-free organic dyes (E)-2-cyano-3-(10-(prop-2-yn-1-yl)-10H-phenothiazin-3-yl)acrylic acid (PPC) and (E)-2-cyano-3-(10-((1-((7-methyl-2-oxo-2H-chromen-4-yl)methyl)-1H-1,2,3-triazol-4-yl)methyl)-4a,10a-dihydro-10H-phenothiazin-3-yl)acrylic acid (PCTC) was synthesized and then anchored to 1D cadmium sulfide nanowires (1D CdS NWs) for application in photoelectrochemical dye-sensitized solar cell (DSSC). The 1D CdS nanowires were interconnected into a nanonetwork using solution chemistry in a straightforward and efficient manner. The UV-visible spectroscopy, cyclic voltammetry and density

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6

Keruckiene, Rasa, Simona Vekteryte, Ervinas Urbonas, et al. "Synthesis and properties of quinazoline-based versatile exciplex-forming compounds." Beilstein Journal of Organic Chemistry 16 (May 28, 2020): 1142–53. http://dx.doi.org/10.3762/bjoc.16.101.

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Three compounds, bearing a quinazoline unit as the acceptor core and carbazole, dimethyldihydroacridine, or phenothiazine donor moieties, were designed and synthesized in two steps including a facile copper-catalyzed cyclization and a nucleophilic aromatic substitution reaction. The photophysical properties of the compounds, based on theoretical calculations and experimental measurements, as well as the electrochemical and thermal properties, are discussed. The synthesized compounds form glasses with glass-transition temperatures ranging from 116 °C to 123 °C. The ionization potentials estimat

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7

Nhari, Laila M., Reda M. El-Shishtawy, Qiuchen Lu, Yuanzuo Li, and Abdullah M. Asiri. "Novel Triarylamine-Based Hole Transport Materials: Synthesis, Characterization and Computational Investigation." Materials 14, no. 11 (2021): 3128. http://dx.doi.org/10.3390/ma14113128.

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Three novel triarylamine-based electron-rich chromophores were synthesized and fully characterized. Compounds 1 and 2 were designed with electron-rich triphenylamine skeleton bearing two and four decyloxy groups namely, 3,4-bis(decyloxy)-N,N-diphenylaniline and N-(3,4-bis(decyloxy)phenyl)-3,4-bis(decyloxy)-N-phenylaniline, respectively. The well-known electron-rich phenothiazine was introduced to diphenylamine moiety through a thiazole ring to form N,N-bis(3,4-bis(decyloxy)phenyl)-5-(10H-phenothiazin-2-yl)thiazol-2-amine (Compound 3). These three novel compounds were fully characterized and th

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8

Lawrence, William D., Mark R. Deziel, Paul J. Davis, Marion Schoenl, Faith B. Davis, and Susan D. Blas. "Thyroid hormone stimulates release of calmodulin-enhancing activity from human erythrocyte membranes in vitro." Clinical Science 84, no. 2 (1993): 217–23. http://dx.doi.org/10.1042/cs0840217.

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1. Thyroid hormone (L-thyroxine, 10−10mol/l) incubated in vitro with human erythrocyte membranes induced the release of a soluble calmodulin-like material, the 3′:5′-cyclic nucleotide phosphodiesterase-stimulating activity of which was at least six-fold greater than its concentration measured by a specific calmodulin radioimmunoassay. 2. The material had the characteristics of calmodulin in that it stimulated both phosphodiesterase and erythrocyte Ca2+-ATPase activities, cross-reacted with and was neutralized by anti-calmodulin antibody, was adsorbed by phenothiazine-Sepharose and was heat-sta

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9

Andrieux, Claude P., Pierre Audebert, and Jean Michel Savéant. "Studies of modified electrodes starting from pyrrole monomers derivatized by anthraquinone, phenothiazine or anthracene moieties on the nitrogen or in the 3-position. Syntheses, cyclic voltammetry and a study of charge-transfer reactions." Synthetic Metals 35, no. 1-2 (1990): 155–58. http://dx.doi.org/10.1016/0379-6779(90)90039-n.

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10

Alqrad, Manea A. I., Dina S. El-Agamy, Sabrin R. M. Ibrahim та ін. "SIRT1/Nrf2/NF-κB Signaling Mediates Anti-Inflammatory and Anti-Apoptotic Activities of Oleanolic Acid in a Mouse Model of Acute Hepatorenal Damage". Medicina 59, № 7 (2023): 1351. http://dx.doi.org/10.3390/medicina59071351.

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Background and objectives: Oleanolic acid (OA) is a penta-cyclic triterpene with diverse bioactivities such as anticarcinogenic, antiviral, antimicrobial, hepatoprotective, anti-atherosclerotic, hypolipidemic, and gastroprotective. However, its effects on hepatorenal damage remain unclear. The protective activity of OA, separated from Viscum schimperi (Loranthaceae), against TAA (thioacetamide)-produced acute hepatic and renal damage was explored. Materials and Methods: Mice were treated with OA for 7 days before TAA (200 mg/kg, i.p.). Serum indices of hepatorenal injury, pathological lesions,

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11

Peng, Xiaolin, Yulin Wang, Yixian Huang, Sheng Zhang, Zhichao Jin, and Shi-Chao Ren. "N-Hetero cyclic carbene catalysis for facile access to Pentasubstituted 4-H Pyran derivatives." Synlett, January 24, 2024. http://dx.doi.org/10.1055/a-2253-4365.

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The synthesis of multi-substituted 4-H Pyrans derivatives has drawn considerable attention due to its wide application in agrochemicals, pharmaceuticals, and other functional molecules. Herein, we report an N-heterocyclic carbene (NHC)-catalyzed [3+3] annulation reactions between -ketone esters and enynals for quick access to penta-substituted 4-H Pyran derivatives via a regioselective activation of ynals. A series of 4-H Pyrans derivatives bearing various substituents were obtained in moderate to excellent yields. This method may find further applications in the synthesis of structurally div

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12

van der Does, Chris, Frank Braun, Hongcheng Ren, and Sonja-Verena Albers. "Putative nucleotide-based second messengers in archaea." microLife 4 (2023). http://dx.doi.org/10.1093/femsml/uqad027.

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Abstract Second messengers transfer signals from changing intra- and extracellular conditions to a cellular response. Over the last few decades, several nucleotide-based second messengers have been identified and characterized in especially bacteria and eukaryotes. Also in archaea, several nucleotide-based second messengers have been identified. This review will summarize our understanding of nucleotide-based second messengers in archaea. For some of the nucleotide-based second messengers, like cyclic di-AMP and cyclic oligoadenylates, their roles in archaea have become clear. Cyclic di-AMP pl

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13

Braun, Frank, Alejandra Recalde, Heike Bähre, Roland Seifert, and Sonja-Verena Albers. "Putative Nucleotide-Based Second Messengers in the Archaeal Model Organisms Haloferax volcanii and Sulfolobus acidocaldarius." Frontiers in Microbiology 12 (November 22, 2021). http://dx.doi.org/10.3389/fmicb.2021.779012.

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Research on nucleotide-based second messengers began in 1956 with the discovery of cyclic adenosine monophosphate (3′,5′-cAMP) by Earl Wilbur Sutherland and his co-workers. Since then, a broad variety of different signaling molecules composed of nucleotides has been discovered. These molecules fulfill crucial tasks in the context of intracellular signal transduction. The vast majority of the currently available knowledge about nucleotide-based second messengers originates from model organisms belonging either to the domain of eukaryotes or to the domain of bacteria, while the archaeal domain i

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14

Saunders, George, Sam Spring, Eleanor Jayawant, et al. "Synthesis and Functionalization of Azetidine‐Containing Small Macrocyclic Peptides." Chemistry – A European Journal, March 15, 2024. http://dx.doi.org/10.1002/chem.202400308.

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Cyclic peptides are increasingly important structures in drugs but their development can be impeded by difficulties associated with their synthesis. Here, we introduce the 3‐aminoazetidine (3‐AAz) subunit as a new turn‐inducing element for the efficient synthesis of small head‐to‐tail cyclic peptides. Greatly improved cyclizations of tetra‐, penta‐ and hexapeptides (28 examples) under standard reaction conditions are achieved by introduction of this element within the linear peptide precursor. Post‐cyclization deprotection of the amino acid side chains with strong acid is realized without degr

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15

Fan, Yaqin, Chunjiao Jiang, Yan Zhang, et al. "Pro-angiogenic New Chloro-Azaphilone Derivatives From the Hadal Trench-Derived Fungus Chaetomium globosum YP-106." Frontiers in Microbiology 13 (July 22, 2022). http://dx.doi.org/10.3389/fmicb.2022.943452.

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Five new chloro-azaphilones, chaetofanixins A–E (1–5), and five known analogs (6–10) were isolated and identified from the hadal trench-derived fungus Chaetomium globosum YP-106. The structure of chaetofanixin E (5) is unique and interesting, bearing a highly rigid 6/6/5/3/5 penta-cyclic ring system, which is first encountered in natural products. The structures of these compounds, including absolute configurations, were determined based on the spectroscopic analysis, electronic circular dichroism (ECD) calculations, and analysis of biogenetic origins. Compounds 1–7 significantly promoted angi

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16

Priya, C., S. Anuja, R. Suresh Babu, and S. Sriman Narayanan. "Development of an amperometric sensor for epinephrine determination using an Azure A/silver nanocluster modified electrode." Micro and Nano Systems Letters 11, no. 1 (2023). http://dx.doi.org/10.1186/s40486-023-00174-x.

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AbstractA novel electrochemical sensor was developed for the detection of Epinephrine (EP) utilizing Azure A (AzA), a phenothiazine dye, and citrate-capped silver nanoparticles. The interaction between Azure A and silver nanoparticles facilitated the formation of AzA/silver nanoclusters through a self-assembled approach. The morphological analysis of AzA/silver nanoclusters was conducted using field-emission scanning electron microscopy (FESEM). The nanoclusters were then immobilized on a graphite electrode via a simple drop-casting method, resulting in a modified electrode. The electrochemica

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17

Rasa, Simona, Ervinas, et al. "Synthesis and properties of quinazoline-based versatile exciplex-forming compounds." May 28, 2020. https://doi.org/10.3762/bjoc.16.101.

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Three compounds, bearing a quinazoline unit as the acceptor core and carbazole, dimethyldihydroacridine, or phenothiazine donor moieties, were designed and synthesized in two steps including a facile copper-catalyzed cyclization and a nucleophilic aromatic substitution reaction. The photophysical properties of the compounds, based on theoretical calculations and experimental measurements, as well as the electrochemical and thermal properties, are discussed. The synthesized compounds form glasses with glasstransition temperatures ranging from 116 °C to 123 °C. The ionization potentials

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18

Williams, Alexus, Keshawna Smith, Zarin Bhuiyan, Jasmine Phillips, Hua Zhao, and Takayuki Nitta. "Betulinic acid and its ionic derivatives impaired growth of prostate cancer cells without induction of GRP78 and CHOP." Current Issues in Pharmacy and Medical Sciences, December 31, 2022. http://dx.doi.org/10.2478/cipms-2022-0030.

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Abstract Prostate cancer (PCa) is the most common invasive malignancy for men in the USA. The incidence and mortality rates of PCa are significantly higher among African American men, as compared to those in Caucasian men. Betulinic acid (BA) is a penta-cyclic triterpenoid that is often found in the bark of several species of plants. It possesses a variety of biological activities, including anti-cancer activities. We examined the cytotoxic effects and endoplasmic reticulum (ER) stress induced by BA and its ionic derivatives with PCa cells derived from African Americans and Caucasian men. The

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19

Zhang, Jiawei, Huiqi Li, Zhiyuan Jiang, and Zhaoxiong Xie. "Size and Shape Controlled Synthesis of Pd Nanocrystals." Physical Sciences Reviews 3, no. 10 (2018). http://dx.doi.org/10.1515/psr-2017-0101.

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Abstract Palladium (Pd) has attracted substantial academic interest due to its remarkable properties and extensive applications in many industrial processes and commercial devices. The development of Pd nanocrystals (NCs) would contribute to reduce overall precious metal loadings, and allow the efficient utilization of energy at lower economic costs. Furthermore, some of the important properties of Pd NCs can be substantially enhanced by rational designing and tight controlling of both size and shape. In this review, we have summarized the state-of-the-art research progress in the shape and si

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20

Narra, Vamsi Krishna, Venkata Suman Krishna Jonnadula, Prakash Singh Surya та ін. "Donor-π-acceptor based stable porphyrin sensitizers for dye-sensitized solar cells: Effect of π-conjugated spacers". 3 березня 2017. https://doi.org/10.1021/acs.jpcc.6b12869.

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Porphyrins are major sensitizers in dye-sensitized solar cells (DSSC) results in very high power conversion efficiency, however, aggregation tendency and visible range absorption avoids realistic applications. Thus, designing of novel porphyrins based sensitizers are essential to resolve the current existing issues. In this context, seven D–π–A porphyrin dyes (<strong>LG1–LG7</strong>) engineered with 3-ethynyl phenothiazine tethered at the meso-position and π-spacers such as 4-ethynyl phenyl (<strong>LG1</strong>), 5-ethynylthiophene (<strong>LG2</strong>), 5-ethynyl f

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21

Al-Khazraji, Shaima Ibraheem, Luma S. Ahamed, and Rana Abid Ali. "Synthesis and Characterization of some new heterocyclic derivatives from aromatic carbonyl ‎compounds and carboxylic acids with Evaluation some of them for biological activity." Iraqi Journal of Science, April 30, 2024, 1855–69. http://dx.doi.org/10.24996/ijs.2024.65.4.6.

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In this research investigation, a total of eighteen diverse tetra- and penta-lateral cyclic compounds were synthesized. These included 1,3,4-thiadiazole, thiazolidin-4-one (via an alternative method), 1,2,4-triazole, carbothioamide, thiazole-4-one, azetidin-2-one, and oxazole. The synthesis procedure entailed a sequence of reactions. The thiazolidine-4-one 1 was obtained by reaction p-aminobenzoic acid with thiosemicarbazide, followed by treatment with p-tolualdehyde to produce Schiff base 2. Reaction Schiff base 2 with mercaptoacetic acid in dry benzene was carried out to produce thiazolidine

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22

sprotocols. "Stereo-separations of Peptides by Capillary Electrophoresis and Chromatography." December 31, 2014. https://doi.org/10.5281/zenodo.13666.

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Authors: Afzal Hussain, Iqbal Hussain, Mohamed F. Al-Ajmi & Imran Ali ### Abstract Small peptides (di-, tri-, tetra- penta- hexa etc. and peptides) control many chemical and biological processes. The biological importance of stereomers of peptides is of great value. The stereo-separations of peptides are gaining importance in biological and medicinal sciences and pharmaceutical industries. There is a great need of experimental protocols of stereo-separations of peptides. The various chiral selector used were polysaccharides, cyclodextrins, Pirkle’s types, macrocyclic antibiotics, crown eth

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