{"id":27648,"date":"2018-03-09T09:20:00","date_gmt":"2018-03-09T09:20:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/fragmentacion-radicalaria-de-hemiacetales-anomericos-de-carbohidratos-mecanismo-y-utilidad\/"},"modified":"2018-03-09T09:20:00","modified_gmt":"2018-03-09T09:20:00","slug":"fragmentacion-radicalaria-de-hemiacetales-anomericos-de-carbohidratos-mecanismo-y-utilidad","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/la-laguna\/fragmentacion-radicalaria-de-hemiacetales-anomericos-de-carbohidratos-mecanismo-y-utilidad\/","title":{"rendered":"Fragmentaci\u00f3n radicalaria de hemiacetales anom\u00e9ricos de carbohidratos. mecanismo y utilidad"},"content":{"rendered":"<h2>Tesis doctoral de <strong>  Riesco Fagundo Rosario Concepci\u00f3n <\/strong><\/h2>\n<p>El trabajo recogido en los tres primeros cap\u00edtulos de la memoria se centra en la s\u00edntesis de alditoles gem-diahalogenados y la evaluaci\u00f3n de su utilidad sint\u00e9tica.  para realizarlo, se prepararon a partir de glicales numerosas 1,2-halohidrinas con distinto tipo y grado de sustituci\u00f3n. La aplicaci\u00f3n a estas halohidrinas derivadas de carbohidratos, de la reacci\u00f3n de b-fragmentaci\u00f3n con el sistema dib\/i2 constituye en nuevo m\u00e9todo general para la s\u00edntesis de 1-halo-1-yodo alditoles, con rendimientos excelentes. Esta metodolog\u00eda se ha extendido con resultados satisfactorios a la s\u00edntesis de 1-halo-1-bromo alditoles por b-fragmentaci\u00f3n de 1,2-halohidrinas con el sistema dib\/br2, utilizando br2 por primera vez en este en este tipo de reacciones. Resultan especialmente interesantes los alditoles gem-diyodados por sus m\u00faltiples aplicaciones sint\u00e9ticas y los alditoles halo-fluorados por sus propiedades biol\u00f3gicas y f\u00edsicas.  estos alditoles gem-dihalogenados, se utilizaron como sustratos de la reacci\u00f3n de takai, permitiendo la s\u00edntesis de (e)-alquenos quirales. Adem\u00e1s, se ha desarrollado una nueva metodolog\u00eda para la s\u00edntesis de yoduros y fluoruros de vinilo quirales, a partir de alditoles diyodados y fluoroyodados, que es posible extender a la obtenci\u00f3n de bromuros de vinilo quirales, a partir de los correspondientes alditoles dibromados. Las aplicaciones sint\u00e9ticas de estos haluros de vinilo son m\u00faltiples.  en el \u00faltimo cap\u00edtulo de la memoria se describe la s\u00edntesis de iminoaz\u00facares oxigenados en el carbono anom\u00e9rico (derivados de dab-1, nectrisina y 4-epi-nectrisina) mediante una metodolog\u00eda de b-fragmentaci\u00f3n. Por otra parte, se aporta un nuevo procedimiento que complementa el anterior al permitir la s\u00edntesis de iminoaz\u00facares desoxigenados en el carbono anom\u00e9rico y que adem\u00e1s permite obtener isoiminoaz\u00facares, compuestos que poseen a\u00fan mayor capacidad para inhibir glicosidasas que los iminoaz\u00facares natur<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Fragmentaci\u00f3n radicalaria de hemiacetales anom\u00e9ricos de carbohidratos. mecanismo y utilidad<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Fragmentaci\u00f3n radicalaria de hemiacetales anom\u00e9ricos de carbohidratos. mecanismo y utilidad <\/li>\n<li><strong>Autor:<\/strong>\u00a0  Riesco Fagundo Rosario Concepci\u00f3n <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 La laguna<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 15\/12\/2003<\/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>Ernesto Suarez L\u00f3pez<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: rafael Suau suarez <\/li>\n<li>carmen Betancor espino (vocal)<\/li>\n<li>Jos\u00e9 Manuel Garc\u00eda fern\u00e1ndez (vocal)<\/li>\n<li>cosme Garc\u00eda Francisco (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Riesco Fagundo Rosario Concepci\u00f3n El trabajo recogido en los tres primeros cap\u00edtulos de la memoria se centra [&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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