{"id":57340,"date":"2007-02-03T00:00:00","date_gmt":"2007-02-03T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/reacciones-altamente-selectivas-de-eliminacion-y-ciclopropanacion-promovidas-por-crcl2-aplicacion-de-la-reaccion-de-olefinacion-a-la-sintesis-de-compuestos-insaturados-enantiopuros\/"},"modified":"2007-02-03T00:00:00","modified_gmt":"2007-02-03T00:00:00","slug":"reacciones-altamente-selectivas-de-eliminacion-y-ciclopropanacion-promovidas-por-crcl2-aplicacion-de-la-reaccion-de-olefinacion-a-la-sintesis-de-compuestos-insaturados-enantiopuros","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/quimica-organica\/reacciones-altamente-selectivas-de-eliminacion-y-ciclopropanacion-promovidas-por-crcl2-aplicacion-de-la-reaccion-de-olefinacion-a-la-sintesis-de-compuestos-insaturados-enantiopuros\/","title":{"rendered":"Reacciones altamente selectivas de eliminaci\u00f3n y ciclopropanaci\u00f3n promovidas por crcl2. aplicaci\u00f3n de la reacci\u00f3n de olefinaci\u00f3n a la sintesis de compuestos insaturados enantiopuros"},"content":{"rendered":"<h2>Tesis doctoral de <strong>  Mejica Iglesias Mar\u00eda  Del Carmen <\/strong><\/h2>\n<p>En esta memoria se describen nuevas aplicaciones del dicloruro de cromo en s\u00edntesis org\u00e1nica, prestando especial atenci\u00f3n al control de la selectividad y, m\u00e1s concretamente, a su estereoslectividad. en el primer cap\u00edtulo se recogen los resultados obtenidos en la reacci\u00f3n de b-eliminaci\u00f3n de a-halo-b-hidroxi\u00e9steres y cetonas promovidas por crcl2, obteni\u00e9ndose \u00e9steres o cetonas a,b-insaturadas en total diastereoselecci\u00f3n. en el segundo cap\u00edtulo se describen dos tipos de reacciones secuenciales promovidos por crcl2. En la primera parte, se muestra la transformaci\u00f3n, tanto de aldeh\u00eddos en general, como de a-aminoaldeh\u00eddos \u00f3pticamente activos, en \u00e9steres a,b-insaturados y g-amino\u00e9steres, a,b-insaturados enantiopuros, empleando dibromacetato de etilo y dicloruro de cromo.  la segunda reacci\u00f3n secuencial sirve para obtener n,n-dibencil-1-halogenoalqu-1-en-3-aminas \u00f3pticamente activas, por reacci\u00f3n de n,n-dibencil-2-aminoaldeh\u00eddos con diferentes haloformos, en presencia de crcl2. por \u00faltimo, en el tercer cap\u00edtulo se describe un nuevo proceso de ciclopropanaci\u00f3n estereoespec\u00edfica de maindas a,b-insturadas empleando tambi\u00e9n dicloruro de crono. Asimismo se exponen los resultados obtenidos en la silil-alquilciclopropanaci\u00f3n de estos mismos sustratos. Igualmente, se describen los resultados preliminares obtenidos en la bromo- y clorociclopropanaci\u00f3n de dichas amidas. por \u00faltimo, se muestra el primer ejemplo llevado a cabo, de sililciclopropanaci\u00f3n catal\u00edtica de la (e)-cinamamida.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Reacciones altamente selectivas de eliminaci\u00f3n y ciclopropanaci\u00f3n promovidas por crcl2. aplicaci\u00f3n de la reacci\u00f3n de olefinaci\u00f3n a la sintesis de compuestos insaturados enantiopuros<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Reacciones altamente selectivas de eliminaci\u00f3n y ciclopropanaci\u00f3n promovidas por crcl2. aplicaci\u00f3n de la reacci\u00f3n de olefinaci\u00f3n a la sintesis de compuestos insaturados enantiopuros <\/li>\n<li><strong>Autor:<\/strong>\u00a0  Mejica Iglesias Mar\u00eda  Del Carmen <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Oviedo<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 02\/03\/2007<\/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>Jos\u00e9 Manuel Concell\u00f3n Gracia<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Gregorio Asensio Aguilar <\/li>\n<li> Pulido Pelaez Francisco Jos\u00e9 (vocal)<\/li>\n<li>Mar\u00eda  Del Carmen Carre\u00f1o Garcia (vocal)<\/li>\n<li>Carmen Lopez Leonardo (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Mejica Iglesias Mar\u00eda Del Carmen En esta memoria se describen nuevas aplicaciones del dicloruro de cromo en 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