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Revisiting the addition reaction of TeCl4 to alkynes: the crystal structure and docking studies of 1-chloro-2-trichlorotelluro-3-phenyl-propen-2-ol
(Elsevier B.V., 2006-11-15)
Tellurium tetrachloride adds to alkynes via two pathways: a concerted syn addition, that yields Z-tri- and tetra-substituted alkenes or by an anti addition that yields E-alkenes. The mechanistic aspects of these divergent ...
Tellurium and precious-metal ore minerals at Mina Capillitas, Northwestern Argentina
(E Schweizerbartsche Verlags, 2004-05-01)
Mina Capillitas is an epithermal-type deposit located in Catamarca province of NW Argentina. Six separate stages of mineralization were identified in this complex Cu-Au-S-As-Sb-Pb-Zn association; the native elements (Au ...
Irreversible inhibition of human cathepsins B, L, S and K by hypervalent tellurium compounds
(WALTER DE GRUYTER & CO, 2009)
The inhibition of human cysteine cathepsins B, L, S and K was evaluated by a set of hypervalent tellurium compounds (telluranes) comprising both organic and inorganic derivatives. All telluranes studied showed a time-and ...
Copper catalyzed cross-coupling reactions of diaryl ditellurides with potassium aryltrifluoroborate salts
(Sociedade Brasileira de Química, 2009)
We present here results of the cross-coupling reaction of diaryl ditellurides with potassium aryltrifluoroborate salts using a catalytic amount of Cu(OAc)2 and bypiridine in DMSO/H2O under air atmosphere. This cross-coupling ...
Negishi cross-coupling of organotellurium compounds: synthesis of biaryls, aryl-, and diaryl acetylenes
(PERGAMON-ELSEVIER SCIENCE LTD, 2011)
A functional group tolerant palladium-catalyzed Negishi coupling of diaryl tellurides with organozinc has been developed. This methodology permits efficient preparation of biaryls, aryl acetylenes and diaryl acetylenes in ...
Antioxidant effect of functionalized alkyl-organotellurides: a study in vitro
(TAYLOR & FRANCIS LTD, 2010)
We evaluated the in vitro antioxidant effect of alkyl-organotellurides A-D on lipid peroxidation and protein carbonylation in rat liver homogenates. The thiol oxidase and thiol peroxidase-like activities of compounds were ...
Structure-activity relationships of hypervalent organochalcogenanes as inhibitors of cysteine cathepsins V and S
(PERGAMON-ELSEVIER SCIENCE LTD, 2011)
A new series of organotelluranes were synthesized and investigated, and the structure-activity relationships in cysteine proteases inhibition were determinated. It was possible to identify the relevance of structural ...
Theory of near-gap second harmonic generation in centrosymmetric magnetic semiconductors: Europium chalcogenides
(AMER PHYSICAL SOC, 2009)
Second harmonic generation is strictly forbidden in centrosymmetric materials, within the electric dipole approximation. Recently, it was found that the centrosymmetric magnetic semiconductors EuTe and EuSe can generate ...
Application of an Artificial Intelligence Technique to Improve Purification in the Zone Refining Process
(SpringerNew YorkEUA, 2010)