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Thiophene Derivatives (thiophene + derivative)
Selected AbstractsChemInform Abstract: Synthesis of Fused Thiopyranthione and Thiophene Derivatives from 4,5-Dihydro-3-thiophene(and -3-furan)-carbonitriles Having an Active Methylene Group at C-2 Position.CHEMINFORM, Issue 33 2010Hiroshi Maruoka Abstract The title carbonitriles (III) are readily converted into novel fused thiopyranthione (V) and thiophene derivatives (VI). [source] ChemInform Abstract: Mannich Reactions of Annulated Thiophene Derivatives.CHEMINFORM, Issue 41 2009Xin Chen Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] Bi(OTf)3/[bmim]BF4 as Novel and Reusable Catalytic System for the Synthesis of Furan, Pyrrole and Thiophene Derivatives.CHEMINFORM, Issue 44 2004J. S. Yadav Abstract For Abstract see ChemInform Abstract in Full Text. [source] A New Simple Method for the Synthesis of Thiophene Derivatives , Generation of Thiocarbonyl Ylides from S-,-(Dimethylphenylsilyl)benzyl Acylates and Their Cycloaddition with Acetylenic Dipolarophiles.CHEMINFORM, Issue 5 2003Mitsuo Komatsu Abstract For Abstract see ChemInform Abstract in Full Text. [source] ChemInform Abstract: Regioselective Palladium-Catalyzed Cross-Coupling Reactions in the Synthesis of Novel 2,3-Disubstituted Thiophene Derivatives.CHEMINFORM, Issue 1 2002Raquel Pereira Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] Synthesis, Characterization, and Field-Effect Transistor Performance of Thieno[3,2-b]thieno[2,,3,:4,5]thieno[2,3-d]thiophene DerivativesADVANCED FUNCTIONAL MATERIALS, Issue 5 2009Ying Liu Abstract The synthesis, characterization, and field-effect transistor (FET) properties of a new class of thieno[3,2-b]thieno[2,,3,:4,5]thieno[2,3-d]thiophene derivatives are described. The optical spectra of their films show the presence of stronger interactions between molecules in the solid state. Thermal analyses reveal that the three materials are thermally stable and have no phase transitions at low temperature. The crystal structures are determined, and show ,-stacked structures and intermolecular S···S contacts. These organic materials exhibit p-type FET behavior with hole mobilities as high as 0.14,cm2,V,1,s,1 and an on/off current ratio of 106. These results indicate that thieno[3,2-b]thieno [2,,3,:4,5]thieno[2,3-d]thiophene, as a linear ,-conjugated system, is an effective building block for developing high-performance organic semiconductors. [source] ChemInform Abstract: One-Pot Synthesis of 2,3-Disubstituted Benzo[b]thiophene Derivatives from 2-Mercaptophenyl Ketones.CHEMINFORM, Issue 33 2008Kazuhiro Kobayashi Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] Synthesis of (Methyl 3-O-Benzyl-4,6-O-benzylidene-2-deoxy-,-D-altropyranosid-2-yl) thiophene Derivatives as Precursors of New Iso-C-nucleoside AnaloguesCHEMINFORM, Issue 37 2003Lidcay Herrera Abstract For Abstract see ChemInform Abstract in Full Text. [source] Asymmetrical Fluorene[2,3- b]benzo[d]thiophene Derivatives: Synthesis, Solid-State Structures, and Application in Solution-Processable Organic Light-Emitting DiodesCHEMISTRY - A EUROPEAN JOURNAL, Issue 33 2009Chunyan Du Abstract A series of novel asymmetrical fused compounds containing the backbone of fluorene[2,3- b]benzo[d]thiophene (FBT) were effectively synthesized and fully characterized. Single-crystal X-ray studies demonstrated that the length of the substituent side chains greatly affects the solid-state packing of the obtained fused compounds. DFT, photophysical, and electrochemical studies all showed that the FBTs have large band gaps, low-lying HOMO energy levels, and therefore good stability toward oxidation. Moreover, the substituents strongly influence the fluorescence properties of the resulting FBT derivatives. The di- n -hexyl compound exhibits intense fluorescence in solution with the highest quantum yield of up to 91,%. Solution-processed green phosphorescent organic light-emitting diodes with the di- n -butyl derivative as the host material exhibited a maximum brightness of 14,185,cd,m,2 and a luminescence efficiency of 12,cd,A,1. [source] Synthesis of trisubstituted thiophenes designed as progesterone receptor modulatorJOURNAL OF HETEROCYCLIC CHEMISTRY, Issue 5 2006Weiqin Jiang When a known 2-[4-morpholino]-3-aryl-5-substituted thiophene, which showed moderate activity as a progesterone antagonist, was superimposed with a potent steroidal progesterone antagonist Org-33628, it showed a fair alignment in most parts of the molecules. According to the molecular modelling, displacement of the morpholine oxygen atom in the thiophene derivative with a carbonyl group would provide a better alignment with the C-3 carbonyl in Org-33628. Thus, a series of novel trisubstituted thiophenes bearing a cyclic ketone moiety was synthesized. Although these compounds only showed weak activities as progesterone receptor antagonists, all target compounds are novel and are fully characterized. [source] Synthesis, Characterization, and Field-Effect Transistor Performance of Thieno[3,2-b]thieno[2,,3,:4,5]thieno[2,3-d]thiophene DerivativesADVANCED FUNCTIONAL MATERIALS, Issue 5 2009Ying Liu Abstract The synthesis, characterization, and field-effect transistor (FET) properties of a new class of thieno[3,2-b]thieno[2,,3,:4,5]thieno[2,3-d]thiophene derivatives are described. The optical spectra of their films show the presence of stronger interactions between molecules in the solid state. Thermal analyses reveal that the three materials are thermally stable and have no phase transitions at low temperature. The crystal structures are determined, and show ,-stacked structures and intermolecular S···S contacts. These organic materials exhibit p-type FET behavior with hole mobilities as high as 0.14,cm2,V,1,s,1 and an on/off current ratio of 106. These results indicate that thieno[3,2-b]thieno [2,,3,:4,5]thieno[2,3-d]thiophene, as a linear ,-conjugated system, is an effective building block for developing high-performance organic semiconductors. [source] An iterative strategy for the synthesis of oligothiophenes by catalytic cross-coupling reactionsHETEROATOM CHEMISTRY, Issue 2 2004Thomas Pinault An iterative strategy for the synthesis of new sulfur-functionalized oligothiophenes by Suzuki or Stille cross-coupling reactions was applied to the reaction of 4-bromo-tert-butylphenylthioether with thiophene derivatives. The planarity of the oligothiophenes obtained was confirmed by the single-crystal X-ray structure analysis of 2-(4,-tert-butylthiophenyl)thiophene, which shows a potentially large electronic conjugation length. © 2004 Wiley Periodicals, Inc. Heteroatom Chem 15:121,126, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/hc.10224 [source] Uses of 2-diazo-4,5,6,7-tetrahydrobenzo[b]thiophene derivatives in the synthesis of azoles, azines, and their fused derivativesHETEROATOM CHEMISTRY, Issue 2 2002Wagnat W. Wardakhan The reactions of 2-diazo-4,5,6,7-tetrahydrobenzo[b]thiophene derivatives with dimeric adducts 2a and 2b gave the hydrazone derivatives 3a and 3b, respectively. The reactivity of the latter products towards various chemical reagents was studied in order to provide azole and azine derivatives incorporating the thiophene ring, and most of them showed high antimicrobial activity. © 2002 Wiley Periodicals, Inc. Heteroatom Chem 13:108,115, 2002; Published online in Wiley Interscience (www.interscience.wiley.com). DOI 10.1002/hc.10003 [source] Synthesis of new 5-substitutedbenzo[b]thiophene derivativesJOURNAL OF HETEROCYCLIC CHEMISTRY, Issue 5 2001S. Pérez-Silanes Previous works of our group have dealt with the synthesis of 1-(aryl)-3-[4-(aryl)piperazin-1-yl]propane derivatives in the search for new and efficient antidepressants with a dual mode of action: serotonin reuptake inhibition and 5-HT1A receptor afinity [1-4]. From these studies we concluded that the 3-[4-(aryl)piperazin-1-yl]-1-(benzo[b]thiophen-3-yl)propane derivatives led to the best results. The continuation of this research project required the preparation of some new 3-acyl-5-substituted benzo[b]thiophenes with a wide variety of substituents at the 5 position, ranging from nitro to hydroxyl derivatives. To obtain these derivatives we acylated the corresponding 5-substituted benzo[b]thiophenes when it was possible. [source] Synthesis and Evaluation of Dual Wavelength Fluorescent Benzo[b]thiophene Boronic Acid Derivatives for Sugar SensingCHEMICAL BIOLOGY & DRUG DESIGN, Issue 4 2007Senol Akay Cell surface glycoproteins have been known to play very important roles in various physiologic and pathologic processes. Small molecule compounds capable of carbohydrate recognition can be very useful for the development of sensing, diagnostic, and therapeutic agents. Along this line, we are interested in developing water-soluble fluorescent boronic acid compounds for carbohydrate recognition. As such, a series of benzo[b]thiophene boronic acid derivatives have been synthesized and their fluorescent properties analyzed at physiologic pH. Benzo[b]thiophene derivatives were found to be a new type of fluorescent reporter compounds capable of dual fluorescent emission under physiologic pH conditions. Compounds 1, 3, 4, 5, and 6 showed unusual emission wavelength shifts upon binding of sugars. These boronic acids will be useful tools for building glycoprotein biosensors for biologic applications. [source] ChemInform Abstract: Synthesis of Fused Thiopyranthione and Thiophene Derivatives from 4,5-Dihydro-3-thiophene(and -3-furan)-carbonitriles Having an Active Methylene Group at C-2 Position.CHEMINFORM, Issue 33 2010Hiroshi Maruoka Abstract The title carbonitriles (III) are readily converted into novel fused thiopyranthione (V) and thiophene derivatives (VI). [source] | ||||||||||