Relevant bibliographies by topics / Methyl-thiophene

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Academic literature on the topic 'Methyl-thiophene'

Author: Grafiati
Published: 5 June 2025
Last updated: 1 August 2025

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Journal articles on the topic "Methyl-thiophene"

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Bar, Sukanta. "Regioselective Synthesis of 5-Propyl-2-((trityloxy)methyl)thiophene-3-carbaldehyde." Molbank 2021, no. 4 (2021): M1289. http://dx.doi.org/10.3390/m1289.

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5-propyl-2-((trityloxy)methyl)thiophene-3-carbaldehyde was synthesized by using the concept of chemo- and regioselective Br/Li exchange reaction from 3-bromo-5-propyl-2-((trityloxy)methyl)thiophene. This is a five-step protocol starting from thiophene with an overall yield of 33%. These lithium/halogen exchange reactions were carried out at −78 °C to rt over the period of 1 to 18 h depending on the reactivity of electrophiles.
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Mahyavanshi, Jyotindra, Snehal Lokhandwala, Jayesh Pandya, and Jigar Patel. "Synthesis, Structural Determination, Docking Study and Bioactivity of Novel Thiophene Derivatives." Asian Journal of Chemistry 36, no. 6 (2024): 1321–26. http://dx.doi.org/10.14233/ajchem.2024.31509.

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The present study reveals 4-methyl-3-(propylamino)thiophene-2-carboxylic acid (Articaine acid) as precursor derivative to synthesize novel thiophene compounds to evaluate their biological activity. The synthesized compounds were subjected to comprehensive characterization techniques including mass spectra, NMR and IR spectroscopy, confirming their structural integrity. Their antimicrobial activity was assessed via minimum inhibitory concentration (MIC) assay against selected bacterial strains. The results emphasize the potential therapeutic applications of these thiophene analogues as efficaci
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Widany, J., G. Daminelli, A. Di Carlo, and P. Lugli. "Density-functional Based Tight-binding Calculations on Thiophene Polymorphism." VLSI Design 13, no. 1-4 (2001): 393–97. http://dx.doi.org/10.1155/2001/93289.

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Total energy calculations based on a density-functional tight-binding scheme have been performed on polymorphic modifications of various thiophene crystals. The investigated structures include sulphanyl-substituted quater-thiophene and methyl-substituted sexithiophene, in the monoclinic and triclinic modifications. Attention has been focused on the intermolecular interaction between the molecular units. Despite the similarities in the backbone geometries, the strength and nature of intermolecular interaction differs largely in the various polymorphs. Sulphur atoms belonging to the thiophene ri
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Rajni Swamy, V., P. Gunasekaran, R. V. Krishnakumar, N. Srinivasan, and P. Müller. "Crystal structure of [4-(2-methoxyphenyl)-3-methyl-1-phenyl-6-trifluoromethyl-1H-pyrazolo[3,4-b]pyridin-5-yl](thiophen-2-yl)methanone." Acta Crystallographica Section E Structure Reports Online 70, no. 9 (2014): o974—o975. http://dx.doi.org/10.1107/s1600536814017437.

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The title compound, C26H18F3N3O2S, a 2-methoxy-substituted derivative, is closely related to its 4-methyl- and 4-chloro-substituted analogues and yet displays no structural relationships with them. The thiophene ring is disorder free and the –CF3group exhibits disorder, respectively, in contrast and similar to that observed in the 4-methyl- and 4-chloro-substituted derivatives. The torsion angle which defines the twist of the thiophene ring is −69.6 (2)° (gauche) in the title compound, whereas it is anticlinal in the 4-methyl- and 4-chloro-substituted derivatives, with respective values of 99.
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Fu, Ying Long, Xue Li, and Gang Liu. "Synthesis and Application of 1-[2-Methyl-5-Phenyl-3-Thiophene]-2-[2-Methyl-5-Phenyl-(4-Vinyl)-3-Thiophene]Perfluorocyclopentene." Applied Mechanics and Materials 662 (October 2014): 87–90. http://dx.doi.org/10.4028/www.scientific.net/amm.662.87.

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A new unsymmetrical photochromic diarylethene 1-(2-methyl-5-phenyl-3-thiophene)-2-[2-methyl-5-phenyl-(4-vinyl)-3-thiophene] perfluorocyclopentene (1o) has been synthesized, and its photochromic reactivity, fluorescent were also investigated. The results showed this compound exhibited reversible photochromism, undergoing reversible cyclization and cycloreversion reactions upon alternating irradiation with UV and visible light in solution,Diarylethene 1 changed the color from colorless to blue upon irradiation with 297 nm UV light, in which absorption maxima were observed at 596 nm in acetonitri
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Singh, Durga Prasad, Seema Pratap, Ray J. Butcher, and Sushil K. Gupta. "Methyl 2-(thiophene-2-carboxamido)benzoate." Acta Crystallographica Section E Structure Reports Online 68, no. 6 (2012): o1765. http://dx.doi.org/10.1107/s160053681202082x.

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The title compound, C13H11NO3S, was synthesized from methyl anthranilate, triethylamine and 2-thiophenoyl chloride in benzene. The molecular conformation is stabilized by an intramolecular N—H...O hydrogen bond. The dihedral angle between the rings is 2.74 (12)°. In the crystal, C—H...O interactions link neighbouring molecules into a three-dimensional network.
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Li, Rong, Yu Jiao Jiang, Fei Chen, Hong Lei Mao, Yong Hong Wang, and Guo Lun Zhong. "Synthesis and Luminescent Properties of Novel Polythiophene Derivatives with 1,3-Dioxane Group." Materials Science Forum 663-665 (November 2010): 268–71. http://dx.doi.org/10.4028/www.scientific.net/msf.663-665.268.

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Two novel polythiophenes with 1,3-dioxane group in the side chain named poly[3-(1,3-dioxane-2-ylethyl)thiophene] (PDT) and poly[3-(1,3-dioxane-2-ylethyl)-4-methyl- thiophene] (PDMT) were synthesized via oxidative polymerization firstly to form their precursor polymers and substitution secondly to obtain the target polymers in this paper. The chemical structures, molecular weights, thermal properties of the polymers were characterized by 1H NMR, FT-IR, GPC, and TGA respectively, indicating that both polymers had high molecular weight and good thermal stability. Meanwhile, the optical absorption
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Lin, Li Gang. "Preparation and Performance of Radiation Grafted Poly(methyl methacrylate)-Graft-Polyimide Pervaporation Membranes for Thiophene/Hydrocarbon Separation." Advanced Materials Research 287-290 (July 2011): 588–91. http://dx.doi.org/10.4028/www.scientific.net/amr.287-290.588.

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Radiation grafted poly(methyl methacrylate)-graft-polyimide membranes were prepared for thiophene/hydrocarbon separation. The effects of various grafting conditions such as reaction time, monomer concentration, diluting solvent and initiator amount on the grafting level were investigated. ATR-IR analyses verified the grafting process. Prepared graft modified membranes showed thiophene permselectivity for thiophene/hydrocarbon mixture on pervaporation. At 3.7 % of grafting rate, flux (1.79kg/(m2·h)) and sulfur enrichment factor (3.81) were obtained with 400μg/g feed sulfur content level.
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Irgashev, Roman A., Nadezhda S. Demina, Polina E. Bayankina, Nikita A. Kazin, and Gennady L. Rusinov. "An Effective Route to Dithieno[3,2-b:2′,3′-d]thiophene-Based Hexaheteroacenes." Synlett 32, no. 10 (2021): 1009–13. http://dx.doi.org/10.1055/a-1398-7237.

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AbstractA series of 12H-[1]benzo[4′′,5′′]thieno[2′′,3′′:4′,5′]thieno[2′,3′:4,5]thieno[3,2-b]indoles were efficiently prepared in three steps starting from available benzo[b]thieno[2,3-d]thiophen-3(2H)-ones. These fused ketones were treated with the Vilsmeier reagent and hydroxylamine hydrochloride to give the corresponding 3-chlorobenzo[b]thieno[2,3-d]thiophene-2-carbonitriles, which then reacted with methyl sulfanylacetate to form methyl 3-aminobenzo[4′,5′]thieno[2′,3′:4,5]thieno[3,2-b]thiophene-2-carboxylates, in accordance with the Fiesselmann thiophene synthesis protocol. Finally, the desi
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Irgashev, Roman A., and Nikita A. Kazin. "Synthesis of Thieno[3,2-b]thiophenes from 2,5-Dicarbonyl 3-Nitrothiophenes via Nucleophilic Aromatic Substitution of the Nitro Group with Thiolates." Organics 5, no. 4 (2024): 507–19. http://dx.doi.org/10.3390/org5040027.

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In this study, we developed an efficient strategy for constructing thieno[3,2-b]thiophene molecules from 3-nitrothiophenes, containing carbonyl fragments at the C-2 and C-5 atoms, by nucleophilic aromatic substitution of the nitro group in these substrates. It was shown that the reaction of 3-nitrothiophene-2,5-dicarboxylates with thiophenols, thioglycolates and 2-mercaptoacetone in the presence of K2CO3 proceeds rapidly via nucleophilic displacement of the nitro group with the formation of 3-sulfenylthiophene-2,5-dicarboxylates. Further treatment of the resulting thiophene-2,5-dicarboxylates,
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Dissertations / Theses on the topic "Methyl-thiophene"

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SENE, CHEIKH. "Proprietes electrochimiques et photovoltaiques du poly(methyl-3 thiophene) electrolytique sur films polycristallins de sulfure de cadmium." Université Louis Pasteur (Strasbourg) (1971-2008), 1992. http://www.theses.fr/1992STR13155.

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Le poly(methyl-3 thiophene) a ete greffe sous la forme de couches minces par des techniques electrochimiques sur des electrodes polycristallines de sulfure de cadmium dope a l'aluminium cds(al). Les proprietes structurales, electroniques et electrochimiques ont ete analysees en fonction de divers parametres impliques dans la synthese. Le contact electronique issu de ce greffage conduit lorsque le poly(methyl-3 thiophene) est fortement dope, a une barriere de type schottky. Les proprietes de ces barrieres sont decrites. La photoreponse de ces dispositifs est determinee par les proprietes electr
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Yang, Florent. "Electrochemical modification of Si surfaces by methyl groups (CH 3, CD 3), ethynyl derivatives, pyrrole and thiophene." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2009. http://dx.doi.org/10.18452/16034.

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Silizium (Si) wird für eine breite Palette von Anwendungen wie z.B. in Solarzellen, Mikroelektronik, Biochips und so weiter eingesetzt. In dieser Arbeit wurden neue Hybridsysteme aus Si und organischen Molekülen, bezüglich der Oberflächenpassivierung des Halbleiters und der resultierenden elektronischen Eigenschaften untersucht. Insbesondere wurden Methyl-Gruppen (CH3 und CD3), Ethynyl-Derivate (H−C≡C-, CH3−C≡C-, und C6H5−C≡C-), sowie Pyrrol und Thiophen aus Grignardlösungen untersucht. Bezüglich Stabilität und Defektkonzentration konnte gezeigt werden, dass organisch modifizierte Si-Oberfläch
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Kerman, Ipek. "Synthesis And Characterization Of Poly(oxalic Acid Dithiophen-3-yl Methyl Ester) And Thiophene Ended Poly-&amp." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/2/12605014/index.pdf.

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Synthesis and characterization of thiophene ended poly-&amp<br>#949<br>-caprolactone (PCL) and oxalic acid dithiophen-3-yl methyl ester (ODME) and their copolymers with both pyrrole and thiophene were achieved. Chemical structure of the precursor polymer and monomer were investigated Redox behavior of polymer and monomers were determined by Cyclic Voltammetry (CV). Structural characterization of samples were carried out by 1H, 13C Nuclear Magnetic Resonance (NMR) and Fourier Transform Infrared Spectroscopy (FTIR). Conductivities of the films were measured by using four probe technique. Therma
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DIENG, MOUSTAPHA. "Contribution a l'elaboration de films de poly(methyl-3 thiophene) de haute qualite sur electrodes semiconductrices ii-vi dopees : application photovoltaique." Université Louis Pasteur (Strasbourg) (1971-2008), 1997. http://www.theses.fr/1997STR13015.

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Les films de poly(methyl-3 thiophene), pmet sont electropolymerises sur ito et sur des semiconducteurs sous forme de films minces (sulfure de cadmium non dope et dope avec differents cations al#3#+, as#3#+, sb#3#+, ni#2#+ et cu#2#+). Dont leurs proprietes intrinseques sont analysees par differentes methodes physiques: microscopie electronique a balayage (meb), diffraction x et spectroscopie a dispersion d'energie (eds). Les roles des differents parametres de synthese tels que la nature de l'anion dopant, l'epaisseur du film, le solvant et la nature du substrat sur les modifications optiques et
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Fabre, Bruno. "Synthèse et étude de films de polymères conducteurs électroniques dopés par des hétéropolyanions : application à la réduction électrocatalytique de NO2- et à la détection du NO in vivo." Université Joseph Fourier (Grenoble ; 1971-2015), 1994. http://www.theses.fr/1994GRE10158.

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Ce travail est consacre a la synthese, la caracterisation physico-chimique et l'application de films de polymeres conducteurs electroniques (pce) incluant des heteropolyanions (hpa). Ces entites minerales, connues pour leurs remarquables proprietes redox, sont immobilisees en tant qu'anion dopant lors de la synthese electrochimique des pce. Dans un premier temps, nous montrons qu'une electrode modifiee par un film de poly(3-methyl thiophene) dope par un hpa de structure de keggin xm#1#2o#4#0#n#- (x = p, si ; m = w, mo et n = 3, 4) presente l'electroactivite des deux partenaires. La reponse ele
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"SYNTHESIS AND CHARACTERIZATION OF POLY(OXALIC ACID DITHIOPHEN-3-YL METHYL ESTER) AND THIOPHENE ENDED POLY-&#949." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/2/12605014/index.pdf.

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Yang, Florent [Verfasser]. "Electrochemical modification of Si surfaces by methyl groups (CH3, CD3), ethynyl derivatives, pyrrole and thiophene / von Florent Yang." 2008. http://d-nb.info/1000370526/34.

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Singh, Kshetrimayum Jugeshwar. "NMR Relaxation And Charge Transport In Conducting Polymers." Thesis, 2009. https://etd.iisc.ac.in/handle/2005/916.

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Conducting and semiconducting polymers, consisting of delocalized π-electrons, have been studied for the past three decades. These materials have shown novel physical properties with interesting applications in batteries, detectors, light emitting diodes, field effect transistors, solar cells, biosensors etc. Nevertheless the charge transport properties are yet to be understood in detail due to the complexity of the system, especially due to the interplay of quasi-one dimensionality (q-1D), disorder, localization and electron-electron interactions(EEI). A combined investigation of both conduct
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Singh, Kshetrimayum Jugeshwar. "NMR Relaxation And Charge Transport In Conducting Polymers." Thesis, 2009. http://hdl.handle.net/2005/916.

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Conducting and semiconducting polymers, consisting of delocalized π-electrons, have been studied for the past three decades. These materials have shown novel physical properties with interesting applications in batteries, detectors, light emitting diodes, field effect transistors, solar cells, biosensors etc. Nevertheless the charge transport properties are yet to be understood in detail due to the complexity of the system, especially due to the interplay of quasi-one dimensionality (q-1D), disorder, localization and electron-electron interactions(EEI). A combined investigation of both conduct
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Book chapters on the topic "Methyl-thiophene"

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Winkelmann, Jochen. "Diffusion coefficient of tetrahydro-thiophene-1,1-dioxide in 1-methyl-naphthalene." In Diffusion in Gases, Liquids and Electrolytes. Springer Berlin Heidelberg, 2018. http://dx.doi.org/10.1007/978-3-662-54089-3_314.

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Weng, Ng Seik, Chen Wei, V. G. Kumar Das, Yap Chee Keong,, and Ray J. Butcher. "Crystal structure of tri-n-butyltin(IV) N-methyl-N-phenyldithiocarbamylacetate, (n-C4H9)3SnOC(O)CH2SC(S)N(CH3) (C6Hs)." In Chemistry and Technology of Silicon and Tin. Oxford University PressOxford, 1992. http://dx.doi.org/10.1093/oso/9780198555803.003.0052.

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Abstract Triorganotin carboxylate esters display several structural variations: triphenyltin thiophene-2-carboxylate is a monomeric molecule, triphenyltin pyridine- 3-carboxylate a flat, pyridyl-bridged polymer and triphenyltin 8-quinolyloxyacetate a water-coordinated, hydrogen-bonded helical chain; the carboxyl oxygen is not involved in either intra- or intermolecular coordination to tin in the three compounds. On the other hand, triphenyltin chloroacetate and triphenyltin 3-benzoylpropionate are carboxylate-bridged, a feature common to triorganotin esters whose carboxylate group is an acetat
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UEHARA, Kaku, Akira MAEKAWA, and Makoto TANAKA. "PHOTOVOLTAIC CELLS BESED ON POLY (3-METHYL THIOPHENE)/ORGANIC DYE JUNCTION." In Clean and Safe Energy Forever. Elsevier, 1990. http://dx.doi.org/10.1016/b978-0-08-037193-1.50047-1.

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Taber, Douglass. "Best Synthetic Methods: Functional Group Protection." In Organic Synthesis. Oxford University Press, 2011. http://dx.doi.org/10.1093/oso/9780199764549.003.0012.

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Benzyl esters are easily deprotected by hydrogenolysis. It is often observed, however, as exemplified by the conversion of 1 to 2 reported (Adv. Synth. Catal. 2008, 350, 406) by Hironao Sajiki of Gifu Pharmacutical University, that alkene hydrogenation can be carried out selectively. Fernando Albericio of the University of Barcelona has developed (Tetrahedron Lett. 2008, 49, 3304) a family of thiophene-based esters 3 that can be removed with acid in the presence of t-butyl esters, and that are stable to the removal of FMOC groups. Vassiliki Theodorou of the University of Ioannina has found (Tet
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Conference papers on the topic "Methyl-thiophene"

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Komura, Tatsushi, Kannappan Santhakumar, Palanisamy Kumar, Paik-Kyun Shin, Kenzo Kojima, and Shizuyasu Ochiai. "Evaluation of the characteristics of the organic thin film solar cell fabricated by poly[4,8-bis(2-ethylhexyloxy)-benzo[1,2-b:4,5-b']dithiophene-2,6-diyl-alt-(4-octanoyl-5-fluoro-thieno[3,4-b]thiophene-2-carboxylate)-2,6-diyl]/[6,6]-phenyl-C71-butyric acid methyl ester." In SPIE Organic Photonics + Electronics, edited by Zakya H. Kafafi, Christoph J. Brabec, and Paul A. Lane. SPIE, 2012. http://dx.doi.org/10.1117/12.928681.

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Reports on the topic "Methyl-thiophene"

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Synthesis of 6-Methyl-9-n-propyldibenzo thiophene-4-ol ammended to 6-Methyl-9-(1-methylethyl)-dibenzo thiophene-4-ol. Quarterly technical progress report No. 6, October 28, 1991--January 26, 1992. Office of Scientific and Technical Information (OSTI), 1992. http://dx.doi.org/10.2172/10158452.

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