{"id":42490,"date":"1999-01-01T00:00:00","date_gmt":"1999-01-01T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/adiciones-aldolicas-estereoselectivas-con-derivados-de-eritrulosa\/"},"modified":"1999-01-01T00:00:00","modified_gmt":"1999-01-01T00:00:00","slug":"adiciones-aldolicas-estereoselectivas-con-derivados-de-eritrulosa","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ingenieria-y-tecnologia-quimicas\/adiciones-aldolicas-estereoselectivas-con-derivados-de-eritrulosa\/","title":{"rendered":"Adiciones aldolicas estereoselectivas con derivados de eritrulosa."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Eva Falomir Ventura <\/strong><\/h2>\n<p>En esta tesis doctoral se han estudiado las adiciones ald\u00f3licas de derivados del carbohidrato eritrulosa a varios aldehidos alif\u00e1ticos y arom\u00e1ticos, as\u00ed como a un aldehido quiral. Las reacciones se han ensayado empleando como reactivos de enolizaci\u00f3n lda. Khmds, bu2botf\/dipea. (C-c6h11)2bc1\/et3n. bubc12\/dipea. Tic14\/dipea. Snc14\/dipea sn(otf)2\/dipea. Con los dos primeros reactivos se provoca la descomposici\u00f3n del sustrato. Con las combinaciones buibotf\/dipea. (C-c6h11)2bc1\/et3n. Y snc14\/dipea se ha conseguido la adici\u00f3n ald\u00f3lica de varios derivados de eritrulosa. Las reacciones son altamente estereoselectivas y funcionan con buen rendimiento. La configuraci\u00f3n  de los aldoles se determin\u00f3 en un caso por difracci\u00f3n de rayos x y en el resto por correlaci\u00f3n qu\u00edmica. Todos los aldoles presentaban configuraci\u00f3n sin-sin. Mediante c\u00e1lculos computacionales se determin\u00f3 que en la etapa de adici\u00f3n con el diciclohexilcloroborano interven\u00eda un enolato z. La etapa de enolizaci\u00f3n tambi\u00e9n se ha estudiado mediante c\u00e1lculos computacionales. se ha observado que si los grupos protectores sobre la parte quiral de la eritrulosa permitan la b-quelaci\u00f3n (grupos bencilo) se forma estereoselectivamente el enolato z. Por otra parte, con grupos no quelantes (benzoatos) se general estereoselectivamente enolatos e. Los enolatos z se adicionan con elevada esteresoselectividad p-facial dando lugar a aldoles sin mientras que los enolatos e proporcionan aldoles anti.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Adiciones aldolicas estereoselectivas con derivados de eritrulosa.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Adiciones aldolicas estereoselectivas con derivados de eritrulosa. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Eva Falomir Ventura <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Jaume i de castell\u00f3n<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/01\/1999<\/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>Juan  Alberto Marco Ventura<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: julio Delgado mart\u00edn <\/li>\n<li>Antonio Mouri\u00f1o mosquera (vocal)<\/li>\n<li>Fernando Aznar gomez (vocal)<\/li>\n<li>jaume Vilarrasa llorens (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Eva Falomir Ventura En esta tesis doctoral se han estudiado las adiciones ald\u00f3licas de derivados del carbohidrato [&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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