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Mostrando ítems 31-40 de 94
Síntese de Calcogenofenos e Isoquinolinas via Reações de Ciclização Intramolecular
(Universidade Federal de Santa MariaBRQuímicaUFSMPrograma de Pós-Graduação em Química, 2013-11-26)
In the first part of this work, a series of selenophenes and tellurophenes were prepared starting from of (Z)-chalcogenoenynes, by employing FeCl3 diorganyl dichalcogenide-mediated intramolecular cyclization. In general, ...
Estudo da reatividade de Fenilcalcogenolatos de Índio(III)
(Universidade Federal de Santa MariaBRQuímicaUFSMPrograma de Pós-Graduação em Química, 2011-03-02)
Indium(III) benzenechalcogenolates (chalcogen = sulfur, selenium) prepared from elemental indium and diphenyl dichalcogenide provide an alternative synthetic route to produce carbon-chalcogen bonds. These compounds promote ...
Síntese e avaliação biológica de compostos derivados da 5’-arilcalcogenil-3’-amino-timidina
(Universidade Federal de Santa MariaBrasilQuímicaUFSMPrograma de Pós-Graduação em QuímicaCentro de Ciências Naturais e Exatas, 2020-11-06)
Organochalcogen compounds have been the subject of several studies regarding their
biological potential in various applications, such as antitumor, antiviral, anti-inflammatory, and
antioxidant. Regarding the last, we ...
Avaliação toxicológica de organocalcogênios em eritrócitos humanos
(Universidade Federal de Santa MariaBRBioquímicaUFSMPrograma de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica, 2009-07-18)
The interest in organochalcogen chemistry, biochemistry and pharmacology has increased in the last two decades mainly due to the fact that a variety of organochalcogen compounds possess biological activity and due the use ...
AGEING EFFECTS IN Ag-Ge-Se BULK GLASSES
(Natl Inst R&d Materials Physics, 2013-11)
Glasses of composition Agx(Ge0.25Se0.75)100-xand Agx(Ge0.25Se0.75)100-xdoped with 0.5 at% of 57Fe were analyzed with the aim to evaluate if their structure evidences any effect of ageing, for thousands of hours at room ...
Practical synthesis of chiral beta-telluro amines by ring-opening reaction of aziridines
(ELSEVIER SCIENCE SA, 2009)
A set of chiral beta-tellurium amines and their selenium and sulfur-containing derivatives have been efficiently synthesized in good to excellent yields via the ring-opening reaction of chiral aziridines by chalcogen ...
Hypervalent organochalcogenanes as inhibitors of protein tyrosine phosphatases
(ROYAL SOC CHEMISTRY, 2011)
A series of organochalcogenanes was synthesized and evaluated as protein tyrosine phosphatases (PTPs) inhibitors. The results indicate that organochalcogenanes inactivate the PTPs in a time- and concentration-dependent ...
Electronic and optical properties of low-dimensional group-IV monochalcogenides
(2020-09-28)
The group-IV monochalcogenides are a set of binary materials M X composed by a group-IV element (M = Sn or Ge) and a chalcogen (X = S or Se). Strong anisotropy is one of the most interesting facets of these materials, ...