Nous agents de solvatació quiral tipus pinça amb anells antracènics: derivats de trifluorometilamines i trifluorometilcarbinols binòlics
The thesis described herein is focused in the synthesis and behaviour study of new Chiral Solvating Agents (CSA) based on molecular tweezers. The new enantiopure compounds prepared, can be differenciated in two big groups the ones with a trifluorotmethylanthrylamine backbone with an isopthalyc acid...
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| Formato: | tesis doctoral |
| Estado: | Versión publicada |
| Fecha de publicación: | 2012 |
| País: | España |
| Recursos: | CBUC, CESCA |
| Repositorio: | TDR. Tesis Doctorales en Red |
| OAI Identifier: | oai:www.tdx.cat:10803/96700 |
| Acesso em linha: | http://hdl.handle.net/10803/96700 |
| Access Level: | acceso abierto |
| Palavra-chave: | RMN Binol Enantiòmer Ciències Experimentals 547 |
| Resumo: | The thesis described herein is focused in the synthesis and behaviour study of new Chiral Solvating Agents (CSA) based on molecular tweezers. The new enantiopure compounds prepared, can be differenciated in two big groups the ones with a trifluorotmethylanthrylamine backbone with an isopthalyc acid as a linking molecule, and the trifluoromethylcarbinol derivatives, these ones linked by a BINOL molecule, which adds an additional stereogenic element due to its chiral axis. As CSA's, these compounds have to collect some main elements into its structure in order to be able to generate different diastereomeric complexes from each enantiomer to the substrate. It is essential, then, the capability of generating non covalent interactions due to complementarity in size, geometry and type of functional groups involve in the two interacting substances. It is very important, as well, the CSA structure contains a very anisotropic group close to the chiral center. For instance an anthracene ring, which will stimulate the formation of a non equivalent magnetic environment at the substrate stereogenic centers, favoring in this way the enantiorecognition. The new compounds enantiodifferenciating capacity has been shown in the measurement of enantiomeric excesses by means of NMR. This, has been evaluated by using different reference substrates and some of the distereoisomeric complexes generated have been studied deeply. |
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