{"id":115398,"date":"2018-03-11T10:43:53","date_gmt":"2018-03-11T10:43:53","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/reaccion-de-michael-enantioselectiva-de-2-nitroetil-sulfonas\/"},"modified":"2018-03-11T10:43:53","modified_gmt":"2018-03-11T10:43:53","slug":"reaccion-de-michael-enantioselectiva-de-2-nitroetil-sulfonas","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/catalisis\/reaccion-de-michael-enantioselectiva-de-2-nitroetil-sulfonas\/","title":{"rendered":"Reacci\u00f3n de michael enantioselectiva de 2-nitroetil sulfonas"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Maitane Zalacain Michelena <\/strong><\/h2>\n<p>El desarrollo exponencial que ha mostrado la cat\u00e1lisis asim\u00e9trica y especialmente la organocat\u00e1lisis durante la \u00faltima d\u00e9cada, ha puesto de manifiesto la gran importancia de esta estrategia. Sin embargo, todav\u00eda existen transformaciones qu\u00edmicas para las que no se han encontrado sistemas organocatal\u00edticos eficaces. Por ejemplo, la alquenilaci\u00f3n organocatal\u00edtica de compuestos \u00c2\u00bf,\u00edY-insaturados, se encuentra restringida de forma general al empleo de reactivos organomet\u00e1licos.Con el objetivo de realizar este tipo de transformaciones sin la presencia de metales, se ha llevado a cabo la s\u00edntesis de diferentes 2-nitroetil sulfonas y 3-nitropropionatos, para su empleo como equivalentes sint\u00e9ticos de los correspondientes aniones vin\u00edlicos. En este contexto la presente tesis doctoral ha tenido como objetivo el estudio de la reacci\u00f3n de michael entre 2-nitroetil sulfonas y 3-nitropropionatos a aldeh\u00eddos \u00c2\u00bf,\u00edY-insaturados promovida por \u00c2\u00bf,\u00c2\u00bf-diarilprolinolsilil \u00e9teres. La eliminaci\u00f3n del \u00e1cido nitroso en los aductos de adici\u00f3n, tambi\u00e9n promovida por base, ha permitido la s\u00edntesis de sulfonas \u00c2\u00bf,\u00edY-insaturadas y \u00e9steres \u00c2\u00bf,\u00edY-insaturados de forma estereocontrolada.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Reacci\u00f3n de michael enantioselectiva de 2-nitroetil sulfonas<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Reacci\u00f3n de michael enantioselectiva de 2-nitroetil sulfonas <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Maitane Zalacain Michelena <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Pa\u00eds vasco\/euskal herriko unibertsitatea<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 19\/03\/2014<\/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>Claudio Palomo Nicolau<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: esther Dominguez perez <\/li>\n<li>josep Bonjoch sese (vocal)<\/li>\n<li>M\u00aa del carmen De la torre egido (vocal)<\/li>\n<li>Alberto Avenoza aznar (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Maitane Zalacain Michelena El desarrollo exponencial que ha mostrado la cat\u00e1lisis asim\u00e9trica y especialmente la organocat\u00e1lisis durante [&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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