Ara mostrant els elements 99-118 de 142
Clarasó Petit, Carlota (Data de defensa: 2019-02-08)
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- ...
Garcia López, Lídia (Data de defensa: 2012-02-24)
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 ...
Rovira Coll, Mireia (Data de defensa: 2017-03-10)
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 ...
Martínez López, Juan Pablo (Data de defensa: 2016-11-18)
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 ...
Casitas Montero, Alícia (Data de defensa: 2012-06-01)
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 ...
Rodríguez Mayorga, Mauricio (Data de defensa: 2018-07-24)
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 ...
Jaén Gil, Adrián (Data de defensa: 2021-05-28)
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, ...
Dachs Soler, Anna (Data de defensa: 2011-07-29)
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 ...
Cassú Ponsatí, Daniel (Data de defensa: 2018-04-20)
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 ...
Vila Vadrí, Jordi (Data de defensa: 2023-04-21)
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 ...
Floor, Geerke Henriette (Data de defensa: 2011-03-29)
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 ...
Cases Amat, Montserrat (Data de defensa: 2003-09-30)
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 ...
Planas i Grabuleda, Marta (Data de defensa: 1996-03-15)
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 ...
Cerezo Frias, Vanessa (Data de defensa: 2009-05-28)
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, ...
Oliveras Rovira, Àngel (Data de defensa: 2020-10-27)
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. ...
Rodríguez Pizarro, Montserrat (Data de defensa: 2000-06-20)
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 ...
Torrent i Palomeras, Anna (Data de defensa: 2007-04-27)
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. ...
Mejias Ruiz, Francesc Xavier (Data de defensa: 2010-06-04)
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 ...
Font Gimbernat, David (Data de defensa: 2003-12-09)
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 ...
Serrano Núñez, Isabel (Data de defensa: 2009-01-23)
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 ...