Results 161 to 170 of about 1,540 (187)

Organotellurium derivatives of dicarboxylic acids

Journal of Organometallic Chemistry, 1976
Abstract The freshly prepared sodium salts of ortho-phthalic acid and tetrabromo ortho-phthalic acid react with diaryltellurium dichlorides in chloroform to afford new dimeric organotellurium carboxylates, R2Te(C8X4O4)2 (X = H, Br). The new compounds contain fourteen membered rings and the detailed structure is discussed particularly in the light of ...
N. Dance, W.R. McWhinnie
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Aspects of Organoselenium and Organotellurium Chemistry

Phosphorus, Sulfur, and Silicon and the Related Elements, 2005
The Chemistry of several condensed selenophenes, and tellurophenes (1–4) will be presented. The synthesis of mixed selenium-tellurium fulvenes (5) and generation of 2,4-bis-methyleneditelluretane (6) will be discussed.
M. V. Lakshmikantham, Emad Aqad, Desikan Rajagopal, Michael P. Cava   +3 more
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ANTIBACTERIAL PROPERTIES OF ORGANOTELLURIUM COMPOUNDS

Problems of Biological, Medical and Pharmaceutical Chemistry
Introduction. Antimicrobial resistance in bacteria has become a global challenge for public health systems. Bacteria that pose the greatest threat to human health due to their increasing resistance to antibiotics include Escherichia coli, Staphylococcus aureus and Salmonella spp. The purpose of the work is to study the antibacterial properties of three
A.I. Israpilova, A.A. Adieva, A.M. Jafarova, G.M. Abakarov, I.V. Amirkhanova   +4 more
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Incorporation of organotellurium(IV) in polyoxometalates

Journal of Organometallic Chemistry, 2015
Abstract We report on the synthesis and solid-state characterization of two sandwich-type heteropoloytungstates containing three cyclobutyltellurium(IV) units, [(C4H8TeIV)3(XIIIW9O33)2]12− (X = As, 1; Sb, 2). Polyanions 1 and 2 were prepared by reaction of cyclobutyltellurium(IV)diiodide (C4H8TeI2) and the trilacunary, lone-pair-containing POM ...
Balamurugan Kandasamy, Bassem S. Bassil, Ali Haider, Jens Beckmann, Banghao Chen, Naresh S. Dalal, Ulrich Kortz   +6 more
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Addition of organotellurium trihalides to acetylenes

Organometallics, 1991
(p-Methoxyphenyl)tellurium trichloride reacts with terminal acetylenes to give 1-chloro-1-organyl-2-[dichloro(p-methoxyphenyl)telluro] ethenes of Z configuration in good yields. The Z stereochemistry of the addition products suggests that the reaction occurs through a four-centered cyclic transition state.
Joao V. Comasseto, Helio A. Stefani, Andre Chieffi, Julio Zukerman-Schpector   +3 more
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Fluorophore-tagged organotellurium and –antimony assemblies

Inorganica Chimica Acta, 2019
Abstract Diorganotellurium- and triorganoantimony dicarboxylates, [(p-MeOPh)2Te(RCOO)2] and [Ph3Sb(RCOO)2] (R = 9-C14H9 (1, 3), 9-C13H9O (2, 4)) have been synthesized and structurally characterized. The molecular structures of 1–4 show that (p-MeOPh)2Te/Ph3Sb moiety is covalently bonded with two oxygen atoms derived from two molecules of the ...
Ramalingam Thirumoorthi, Vadapalli Chandrasekhar   +1 more
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New Synthetic Reactions Using Some Organotelluriums

Phosphorus, Sulfur, and Silicon and the Related Elements, 1992
Abstract Organotelluriums exhibit versatile reactivities of great interest, which include abundunt potentialities to be utilized for organic synthesis. In this paper some new reactions and syntheses of organotelluriums are discussed.
Fumio Ogura, Tetsuo Otsubo, Yoshio Aso
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Role of Organotellurium Species in Tellurium Neuropathy

Neurochemical Research, 1998
Exposure of weanling rats to a diet containing 1% elemental tellurium causes segmental demyelination of peripheral nerve, and an inhibition of squalene epoxidase. This inhibition is thought to be the mechanism of action leading to demyelination. Tellurite appears to be the active inhibitory species in a cell-free system but the active species in vivo ...
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Organotellurium chemistry. The telluroxide elimination reaction

Journal of the Chemical Society, Chemical Communications, 1981
In an effort to clarify the nature of the organotelluroxide elimination reaction, dodecyl-(4-methoxy-phenyl)tellurium oxide and dioxide were thermolysed; mechanisms involvnig tellurenic acid for the oxide and a 1,2-oxygen shift for the dioxide are proposed.
Hosull Lee, Michael P. Cava
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Microwave-Assisted Group-Transfer Cyclization of Organotellurium Compounds

The Journal of Organic Chemistry, 2004
Primary- and secondary-alkyl aryl tellurides, prepared by arenetellurolate ring-opening of epoxides/ O-allylation, were found to undergo rapid (3-10 min) group-transfer cyclization to afford tetrahydrofuran derivatives in 60-74% yield when heated in a microwave cavity at 250 degrees C in ethylene glycol or at 180 degrees C in water. To go to completion,
Cecilia, Ericsson, Lars, Engman
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