{"id":15728,"date":"2018-03-09T09:03:01","date_gmt":"2018-03-09T09:03:01","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/obtencion-de-ent-labdanos-sa%c2%adntesis-de-chettaphanin-ii-y-aproximacion-sintetica-de-quassinoides\/"},"modified":"2018-03-09T09:03:01","modified_gmt":"2018-03-09T09:03:01","slug":"obtencion-de-ent-labdanos-sa%c2%adntesis-de-chettaphanin-ii-y-aproximacion-sintetica-de-quassinoides","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/quimica\/obtencion-de-ent-labdanos-sa%c2%adntesis-de-chettaphanin-ii-y-aproximacion-sintetica-de-quassinoides\/","title":{"rendered":"Obtenci\u00f3n de ent-labdanos. s\u00edntesis de chettaphanin ii y aproximaci\u00f3n sint\u00e9tica de quassinoides"},"content":{"rendered":"<h2>Tesis doctoral de <strong>  Hern\u00e1ndez Juan  F\u00e9lix Angel <\/strong><\/h2>\n<p>La presente memoria describe, a partir de \u00e1cido ent-hal\u00edmico (componente mayoritario de halimium viscosum, quimiotipo villarino de los aires), su transformaci\u00f3n en diferentes dinor y tetranor ent-labdanos, la s\u00edntesis del producto natural chettaphanin ii y una aproximaci\u00f3n sint\u00e9tica de quassinoides.  la s\u00edntesis de ent-labdanos a partir de ent-hal\u00edmanos (ent-labdanos reordenados) se lleva a cabo de forma contraria al desarrollo biogen\u00e9tico, es decir, mediante migraci\u00f3n de me-20 desde c9 a c10. Dicho estudio se ha realizado por ordenamiento de diferentes 1beta,10beta-ep\u00f3xidos de di y tetranor ent-halimanos con \u00e1cidos de lewis.  se ha realizado la s\u00edntesis de chettaphanin ii, a partir de \u00e1cido ent-hal\u00edmico, lo que ha permitido corroborar su estructura por rayos x y establecer la configuraci\u00f3n absoluta del producto natural.  con este trabajo se inicia un estudio sint\u00e9tico que permita determinar las posibilidades de utilizaci\u00f3n del \u00e1cido ent-halimico como producto de partida en la s\u00edntesis de triterpenos degradados, quassinoides, de esqueleto picrasano o bien de diterpenos de esqueleto tric\u00edclico. El sistema bic\u00edclico del \u00e1cido ent-hal\u00edmico se ha incorporado como parte bc de un sistema tric\u00edclico abc de 20 carbones.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Obtenci\u00f3n de ent-labdanos. s\u00edntesis de chettaphanin ii y aproximaci\u00f3n sint\u00e9tica de quassinoides<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Obtenci\u00f3n de ent-labdanos. s\u00edntesis de chettaphanin ii y aproximaci\u00f3n sint\u00e9tica de quassinoides <\/li>\n<li><strong>Autor:<\/strong>\u00a0  Hern\u00e1ndez Juan  F\u00e9lix Angel <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Salamanca<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 22\/02\/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>Isidro Sanchez Marcos<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: benjam\u00edn Rodr\u00edguez gonz\u00e1lez <\/li>\n<li>Mar\u00eda  de gracia Garc\u00eda mart\u00edn (vocal)<\/li>\n<li>Alberto Gonz\u00e1lez guerrero (vocal)<\/li>\n<li>david D\u00edez mart\u00edn (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Hern\u00e1ndez Juan F\u00e9lix Angel La presente memoria describe, a partir de \u00e1cido ent-hal\u00edmico (componente mayoritario de halimium [&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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