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Un alquilideno de titanio terminal y de cuatro coordenadas preparado por la abstracción de alfa-hidrógeno inducida
Falguni Basuli1, Brad C Bailey, John Tomaszewski
1Department of Chemistry and Molecular Structure Center, Indiana University, Bloomington 47405, USA.
Journal of the American Chemical Society
|June 6, 2003
Resumen
La oxidación de un electrón de un complejo de titanio (III) produjo una rara especie de neopentylideno. Este complejo de alquilideno de titanio se somete a reacciones para formar productos tipo Wittig.
Área de la Ciencia:
- Química organometálica Química orgánica de los metales.
- Los complejos de titanio son complejos de titanio.
- Química de los carbenos La química de los carbenos
Sus antecedentes:
- Los complejos de titanio con ligandos de beta-diketiminato (Nacnac) son versátiles intermedios sintéticos.
- La abstracción alfa es una vía de reacción clave para generar especies de alquilideno.
Objetivo del estudio:
- Para sintetizar y caracterizar un raro terminal de cuatro coordenadas neopentylideno complejo de titanio complejo.
- Para investigar la reactividad del alquilideno de titanio sintetizado.
Principales métodos:
- Oxidación de un electrón de un complejo de titanio (III) bis-neopentilo.
- Caracterización estructural de las especies de alquilideno de titanio resultantes.
- Reacción del alquilideno de titanio con la benzofenona y la funcionalidad imina.
Principales resultados:
- Síntesis exitosa y caracterización estructural del complejo neopentylideno de titanio alquilideno (Nacnac) Ti=CHtBu(OTf).
- El complejo de alquilideno de titanio reacciona limpiamente con la benzofenona.
- El complejo de alquilideno de titanio reacciona con la funcionalidad imina del ligando de Nacnac.
Conclusiones:
- El estudio demuestra una ruta viable a los alquildenos terminales raros de titanio a través de la abstracción alfa.
- El alquilideno de titanio sintetizado exhibe reactividad hacia los compuestos carbonilo y su propio ligando de soporte.
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