{"id":88527,"date":"2018-03-10T00:13:33","date_gmt":"2018-03-10T00:13:33","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/reduccions-estereoselectives-de-cetones-acetileniques-i-la-seva-aplicacio-en-la-sa%c2%adntesi-de-productes-naturals\/"},"modified":"2018-03-10T00:13:33","modified_gmt":"2018-03-10T00:13:33","slug":"reduccions-estereoselectives-de-cetones-acetileniques-i-la-seva-aplicacio-en-la-sa%c2%adntesi-de-productes-naturals","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/quimica\/reduccions-estereoselectives-de-cetones-acetileniques-i-la-seva-aplicacio-en-la-sa%c2%adntesi-de-productes-naturals\/","title":{"rendered":"Reduccions estereoselectives de cetones acetil\u00e9niques i la seva aplicaci\u00f3 en la s\u00edntesi de productes naturals"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Marta L\u00f3perz Otero <\/strong><\/h2>\n<p>En este trabajo se han estudiado algunos aspectos de la reducci\u00f3n estereoselectiva de cetonas con borano-dimetil sulfuro y la beta-metil-4,5,5-trimetil-1,3,2-oxazoborolidina, derivada de la fenilglicina.  se ha estudiado una ruta alternativa para el 2-amino-1,1,2,-trifeniletanol precursor de la oxazaborolidina, basada en una eposidaci\u00f3n enantioselectiva del trifenileteno y posterior obertura. Tambi\u00e9n se ha completado el estudio sobre las reducciones estereoselectivas de dicetonas acetil\u00e9nicas. Se ha utilizado una estrategia de bromaci\u00f3n temporal de los alcoholes proparg\u00edlicos provenientes de reducciones estereoselctivas, para mejorar sus excesos diastereom\u00e9ricos (por separaci\u00f3n cromatogr\u00e1fica de la forma meso). Se ha explorado la posibildiad de transformar los diacetetatos de dioles proparg\u00edlicos enriquecedios mediante una oxidaci\u00f3n, en alfa-hidroxi\u00e1cidos.  una buena parte del trabajo se ha dedicado a explorar algunas aplicaciones de nuestro sistema reductor a la s\u00edntesis de productos naturales. Se ha sintetizado el \u00e1cido 4-amino-5-fenil-3-hidroxipentanoico presente en el depsip\u00e9ptido natural hapalosina. Tambi\u00e9n se ha podido realizar la primera s\u00edntesis del petrofurano, en la que se han utilizado con \u00e9xito reacciones cl\u00e1sicas para llegar al producto deseado a partir del furano y el 1-octino. por \u00faltimo se ha desarrollado una estrategia general para acceder a \u00e1cidos paroc\u00f3nicos, basada en una reacci\u00f3n de transposici\u00f3n de ireland-claisen.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Reduccions estereoselectives de cetones acetil\u00e9niques i la seva aplicaci\u00f3 en la s\u00edntesi de productes naturals<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Reduccions estereoselectives de cetones acetil\u00e9niques i la seva aplicaci\u00f3 en la s\u00edntesi de productes naturals <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Marta L\u00f3perz Otero <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Barcelona<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 22\/01\/2001<\/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>Jordi Garc\u00eda G\u00f3mez<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: jaume Vilarrasa llorens <\/li>\n<li>Jos\u00e9 Luis Marco  contelles (vocal)<\/li>\n<li>francesc Camps diez (vocal)<\/li>\n<li>rodolfo Lavilla grifols (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Marta L\u00f3perz Otero En este trabajo se han estudiado algunos aspectos de la reducci\u00f3n estereoselectiva de cetonas [&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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