Universitat de Girona
Ara mostrant els elements 98-117 de 141
Metalloenzymes are a fundamental source of inspiration for synthetic chemists. Oxidation metalloenzymes catalyze oxidation reactions with high efficiency under very mild experimental conditions exhibiting exquisite regio- ...
The development of new chemical processes and efficient catalysts for the formation of carbon-carbon bonds is an important topic in organic chemistry. In particular, the [2+2+2] cycloaddition reaction involving different ...
Organometallic aryl-CuIII species have been proposed as key intermediates in Ullmann-type reactions. However, such species have long remained elusive and mechanistic investigations of a plausible catalytic cycle remained ...
The physical and chemical properties of fullerenes and nanotubes can be conveniently tuned by the attachment of different functional groups to them. Therefore, the systematic understanding of different problems such as ...
This thesis is focused on the unexplored field of organometallic copper(III) chemistry. Arylcopper(III) complexes have been proposed as key intermediates in Ullmann condensation reactions that consist in the coupling of ...
In this thesis, we focused on the alternative methodologies that are based on the reconstruction of density matrices. While in DFT several benchmarks can be found in the literature, for the rest of alternative methodologies ...
The low efficiency of wastewater treatment plants to achieve the complete removal of micropollutants, including pharmaceuticals, has motivated the development of alternative water technologies to improve their efficiency, ...
The [2+2+2] cycloaddition reaction involves the formation of three carbon-carbon bonds in one single step using alkynes, alkenes, nitriles, carbonyls and other unsaturated reagents as reactants. This is one of the most ...
Transition metal-catalysed [2+2+2] cycloaddition reactions involving unsaturated substrates represent one of the most elegant methods in organic chemistry to prepare functionalised cyclic compound. This doctoral thesis is ...
The development of novel catalytic methodologies involving the formation of carbon – carbon/heteroatom bonds to produce cyclic systems constitutes a field of great interest in the modern synthetic organic chemistry. Over ...
Selenium (Se) is an element with important health implications that is emitted in significant amounts from volcanoes. Attracted by the fertility of volcanic soils, around 10% of the world population lives within 100 km of ...
Des del seu descobriment, a la molècula C60 se li coneixen una varietat de derivats segons el tipus de funcionalització amb propietats fisicoquímiques específiques de gran interès científic. Una sel·lecció de derivats ...
Spiro-γ-lactones are widely distributed among natural products, several of them being well known by their interesting biological activities. We describe herein the synthesis of 1-oxaspiro[4.4]nonan derivatives and ...
Els aminoàcids biarílics es troben en una àmplia varietat de pèptids naturals amb important activitat biològica. Concretament, les arilhistidines formen part de les aciculitines, pèptids amb activitat citotòxica i antifúngica, ...
Nowadays, around a third of the agricultural production is lost due to the damage caused by pests, resulting in a significant economic impact. It is estimated that about a third of these losses are provoked by phytopathogens. ...
This doctoral dissertation is divided in two different parts. The first one deals with copper complexes and their magnetic properties. The second one describes the synthesis and characterization of a new family of ruthenium ...
La síntesi i caracterització estructural d'un nou tipus de macrocicles nitrogenats de 15, 20 i 25 membres, els quals contenen triples i dobles enllaços i diferents unitats aríliques a la seva estructura, ha estat estudiada. ...
La tesis doctoral está dividida en 3 partes:<br/>La primera presenta la aplicación del grupo TCP a la síntesis de PNAs en fase sólida. La segunda está dedicada a la síntesis de un nuevo tipo de nucleoaminácido para la ...
En aquest treball s'ha desenvolupat una metodologia eficaç envers la síntesi de diferents derivats pirimidínics amb un alt grau de diversitat molecular. Aquesta metodologia es basa en la S-alquilació selectiva dels ...
La Tesis describe una serie de complejos de Rutenio conteniendo ligandos quirales y su aplicación en catálisis asimétrica. <br/><br/>Por un lado se describe el complejo [RuCl(bpea)((S)-BINAP)](BF4), donde (S)-BINAP es una ...
