{"id":17971,"date":"2002-01-07T00:00:00","date_gmt":"2002-01-07T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/fosfinas-y-fosfitos-quirales-sa%c2%adntesis-y-aplicaciones-en-procesos-catala%c2%adticos-enantioselectivos\/"},"modified":"2002-01-07T00:00:00","modified_gmt":"2002-01-07T00:00:00","slug":"fosfinas-y-fosfitos-quirales-sa%c2%adntesis-y-aplicaciones-en-procesos-catala%c2%adticos-enantioselectivos","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/quimica\/fosfinas-y-fosfitos-quirales-sa%c2%adntesis-y-aplicaciones-en-procesos-catala%c2%adticos-enantioselectivos\/","title":{"rendered":"Fosfinas y fosfitos quirales, s\u00edntesis y aplicaciones en procesos catal\u00edticos enantioselectivos"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Andr\u00e9s Luis Suarez Escobar <\/strong><\/h2>\n<p>La presente tesis doctoral tiene como objetivo la preparaci\u00f3n de nuevos ligandos fosforados para su aplicaci\u00f3n en reacciones catal\u00edticas enantioselectivas. a partir de las consideraciones utilizadas en el dise\u00f1o de los ligandos, se ha dividido la memoria en dos partes.  en el cap\u00edtulo 1 se describe diversos ligandos monodentados de tipo fosfito con sustituyentes carbohidrato, que se han evaluado en la hidrosililaci\u00f3n enantioselectiva de la acetofenona. Los estudios catal\u00edticos se han complementado con otros sobre la reactividad de los fosfitos frente a los complejos olefinicos (rh(c1)(cod))2 y (rh(c1)(c2h4))2, utilizados como precursores met\u00e1licos en las reacciones de hidrosililaci\u00f3n.  por su parte, el cap\u00edtulo 2 trata sobre el estudio de la s\u00edntesis y diversas caracter\u00edsticas de una serie de nuevos ligandos bifuncionales del tipo fosfina-fosfito. El procedimiento sint\u00e9tico utilizando para la preparaci\u00f3n de estos ligandos permite la optimizaci\u00f3n de la estructura del catalizador, mediante la introducci\u00f3n de diversos grupos fosfito y fosfito con caracter\u00edsticas electr\u00f3nicas y est\u00e9ricas diferentes. Finalmente, los ligandos preparados se han empleado en la hidrogenaci\u00f3n catalizada por especies de rh(i) de las olefinas proquirales itaconato de dimetilo y z-alfa-n-acetamidocinamato de metilo. En estas reacciones se han alcanzado niveles de enantioselectividad de hasta el 99.8 y 99.5% ee, respectivamente.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Fosfinas y fosfitos quirales, s\u00edntesis y aplicaciones en procesos catal\u00edticos enantioselectivos<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Fosfinas y fosfitos quirales, s\u00edntesis y aplicaciones en procesos catal\u00edticos enantioselectivos <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Andr\u00e9s Luis Suarez Escobar <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Sevilla<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/07\/2002<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Antonio Pizzano Mancera<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: ernesto Carmona guzm\u00e1n <\/li>\n<li>margarita Paneque sosa (vocal)<\/li>\n<li>daniel Carmona gasc\u00f3n (vocal)<\/li>\n<li>inmaculada Fern\u00e1ndez fern\u00e1ndez (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Andr\u00e9s Luis Suarez Escobar La presente tesis doctoral tiene como objetivo la preparaci\u00f3n de nuevos ligandos fosforados [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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