Browsing CIQUS-Artigos by Title
Now showing items 118-137 of 378
-
Garment allergy caused by Disperse Blue 360: A new sensitizer
(Wiley, 2018-02-15)Disperse dyes are some of the most common causes of textile contact dermatitis. Current legislation does not help to identify the colorant used in a garment -
GATG Dendrimers and PEGylated Block Copolymers: from Synthesis to Bioapplications
(Springer, 2014)Dendrimers are synthetic macromolecules composed of repetitive layers of branching units that emerge from a central core. They are characterized by a tunable size and precise number of peripheral groups which determine ... -
A general route to chiral nanostructures from helical polymers: P/M switch via dynamic metal coordination
(Royal Society of Chemistry, 2017-05-16)A general method for the conversion of a polyphenylacetylene into its P or M helically oriented polymer, and into their corresponding P/M helical nanoparticles via dynamic metal coordination is presented. Addition of Mn+ ... -
A Global View on Block Copolymers
(MDPI, 2020)In this systematic review, a total of 45,143 publications on block copolymers, issued between 1952 and 2019, are analyzed in terms of number, source, language, institution, country, keywords, and block copolymer type, to ... -
Glycosyl Aldehydes: New Scaffolds for the Synthesis of Neoglycoconjugates via Bioorthogonal Oxime Bond Formation
(Georg Thieme Verlag, 2018-01-02)The straightforward preparation of glycosyl neoconjugates by oxime (or hydrazone) bond formation represents a key bioorthogonal tool in chemical biology. However, when this strategy is employed by reacting the reducing end ... -
Glycosylated Cell Penetrating Peptides, GCPPs
(Wiley, 2019-01-23)The cell membrane regulates the exchange of molecules and information with the external environment. However, this control barrier hinders the delivery of exogenous bioactive molecules that can be applied to correct cellular ... -
Gold(I)-catalyzed [2 + 2 + 2] cycloaddition of allenamides, alkenes and aldehydes: a straightforward approach to tetrahydropyrans
(Royal Society of Chemistry, 2015-03-02)Allenamides participate as two-carbon components in an intermolecular [2 + 2 + 2] cycloaddition with alkenes and aldehydes when treated with catalytic amounts of a phosphite gold complex. The reaction is highly regio- and ... -
Gold(I)-Catalyzed Enantioselective [2+2+2] Cycloadditions: An Expedient Entry to Enantioenriched Tetrahydropyran Scaffolds
(American Chemical Society, 2017-02-22)A straightforward and atom-economical enantioselective approach to highly substituted tetrahydropyrans is reported. The process, which consists of an intermolecular gold-catalyzed [2+2+2] cycloaddition between allenamides, ... -
Gold(I)-catalyzed enantioselective cycloaddition reactions
(Beilstein-Institut, 2013)In recent years there have been extraordinary developments of gold(I)-catalyzed enantioselective processes. This includes progress in the area of cycloaddition reactions, which are of particular interest due to their ... -
Gold(I)-Catalyzed Intermolecular Cycloaddition of Allenamides with α,β-Unsaturated Hydrazones: Efficient Access to Highly Substituted Cyclobutanes
(American Chemical Society, 2014-11-19)α,β-Unsaturated N,N-dialkyl hydrazones undergo a mild [2 + 2] cycloaddition to allenamides when treated with a suitable gold catalyst. The method, which represents the first application of N,N-dialkyl hydrazones in gold ... -
Gold(I)‐Catalyzed Cascade Cycloadditions between Allenamides and Carbonyl‐Tethered Alkenes: An Enantioselective Approach to Oxa‐Bridged Medium‐Sized Carbocycles
(Wiley, 2013)Gold standard: Allenamides react with aldehydes or ketones having γ, δ, or ε alkenyl groups, upon activation with suitable gold catalysts, to provide oxa-bridged systems containing seven- to nine-membered carbocycles, in ... -
Gold(I)‐Catalyzed Intermolecular [2+2] Cycloadditions between Allenamides and Alkenes
(Wiley, 2012)3‐(Propa‐1,2‐dien‐1‐yl)oxazolidin‐2‐one works as an efficient two‐carbon partner in a variety of intermolecular gold‐catalyzed [2+2] cycloadditions to alkenes. The transformation represents a simple and practical entry to ... -
Gold(I)–catalyzed enantioselective annulations between allenes and alkene-tethered oxime ethers: A straight entry to highly substituted piperidines and aza-bridged medium-sized carbocycles
(American Chemical Society, 2018)Piperidine scaffolds are present in a wide range of bioactive natural products and are therefore considered as highly valuable, privileged synthetic targets. In this manuscript, we describe a gold-catalyzed annulation ... -
High-affinity sequence-selective DNA binding by iridium(III) polypyridyl organometallopeptides
(Royal Society of Chemistry, 2016)We demonstrate the application of solid-phase peptide synthesis methods for the straightforward assembly of polynuclear Ir(III) organometallopeptides, and show that their oligoarginine derivatives exhibit high DNA binding ... -
Highlights from the 52nd EUCHEM conference on stereochemistry, Bürgenstock, Switzerland, May 2017
(Royal Society of Chemistry, 2017-08-24)The strong wind that was blowing in Brunnen on the 4th of May 2017 was prophetic of the storm of ideas and creativity that would later fall over the participants of the 52nd edition of the Bürgenstock conference. The ... -
Highly Enantioselective Cobalt‐Catalyzed (3+2) Cycloadditions of Alkynylidenecyclopropanes
(Wiley, 2021)Low‐valent cobalt complexes equipped with chiral ligands can efficiently promote highly enantioselective (3+2) cycloadditions of alkyne‐tethered alkylidenecyclopropanes. The annulation allows to assemble bicyclic systems ... -
Highly Enantioselective Iridium(I)-Catalyzed Hydrocarbonation of Alkenes: A Versatile Approach to Heterocyclic Systems Bearing Quaternary Stereocenters
(Wiley, 2021)We report a versatile, highly enantioselective intramolecular hydrocarbonation reaction that provides a direct access to heteropolycyclic systems bearing chiral quaternary carbon stereocenters. The method, which relies on ... -
Hindered rotor tunneling splittings: an application of the two-dimensional non-separable method to benzyl alcohol and two of its fluorine derivatives
(Royal Society of Chemistry, 2016-02-29)In this work we present a novel application of the two-dimensional non-separable (2D-NS) method to the calculation of torsional tunneling splittings in systems with two hindered internal rotors. This method could be ... -
Hollow nanoreactors for Pd-catalyzed Suzuki–Miyaura coupling and O-propargyl cleavage reactions in bio-relevant aqueous media
(Royal Society of Chemistry, 2019)We describe the fabrication of hollow microspheres consisting of mesoporous silica nanoshells decorated with an inner layer of palladium nanoparticles and their use as Pd-nanoreactors in aqueous media. These palladium-equipped ... -
Hydrazone-modulated peptides for efficient gene transfection
(Royal Society of Chemistry, 2017-02-22)Gene transfection continues to be a major challenge in chemistry, biology and materials sciences. New methodologies and recent breakthroughs have renewed the interest in the discovery and development of new tools for ...