Metal-free remote-site C–H alkenylation: regio- and diastereoselective synthesis of solvatochromic dyes
Por favor, use este identificador para citar o enlazar este ítem:
http://hdl.handle.net/10045/73350
Título: | Metal-free remote-site C–H alkenylation: regio- and diastereoselective synthesis of solvatochromic dyes |
---|---|
Autor/es: | Albaladejo Maricó, María José | González Soria, María José | Alonso, Francisco |
Grupo/s de investigación o GITE: | Nuevos Materiales y Catalizadores (MATCAT) |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Química Orgánica | Universidad de Alicante. Instituto Universitario de Síntesis Orgánica |
Palabras clave: | Metal-free remote-site | C–H alkenylation | Regio- and diastereoselective synthesis | Solvatochromic dyes |
Área/s de conocimiento: | Química Orgánica |
Fecha de publicación: | 2018 |
Editor: | Royal Society of Chemistry |
Cita bibliográfica: | Green Chemistry. 2018, 20: 701-712. doi:10.1039/C7GC03436A |
Resumen: | Lately, transition-metal catalysed C–H alkenylation of nitrogen heterocycles has gained increasing attention, often with the intervention of complex and expensive catalytic systems. On the other hand, both, chalcones and indolizines are versatile families of compounds with applications in diverse research areas, including materials science, because of their prominent photophysical attributes. We set forth herein the metal-free regio- and diastereoselective C–H alkenylation of indolizines through a very simple and mild acid–base approach. The most fascinating fact in this remote-site Csp2–Csp2 bond formation is that only one starting material is utilised, which undergoes a formal self-alkenylation to integrate a chalcone moiety and furnish a new family of dyes; a plausible reaction mechanism has been put forward. A one-pot multicomponent protocol was conceived that generates the starting indolizine in situ and has been extended to a multi-gram scale synthesis with equal efficiency. The dyes show a single structure in the solid state but two stable structures in solution (rotamers). Preliminary studies on the optical properties of the dyes reveal a particle-size dependent colour in the solid state and solvatochromism (i.e., different colours in solution depending on the solvent polarity). Remarkably, the solvatochromic behaviour was also displayed in plastics. We believe that this finding opens new avenues in the fields of heterocyclic chemistry, dyes, and materials science. |
Patrocinador/es: | This work was generously supported by the Spanish Ministerio de Economía y Competitividad (MINECO; CTQ2011-24151 and CTQ-2015-66624-P) and the Generalitat Valenciana (GV; grants no. APOTIP/2015/014 and AEST/2015/001). M. J. A. and M. J. G.-S. are grateful to the Instituto de Síntesis Orgánica (ISO) for both pre-doctoral grants (contracts no. I-PAS-44/13 and I-PAS-11/16). |
URI: | http://hdl.handle.net/10045/73350 |
ISSN: | 1463-9262 (Print) | 1463-9270 (Online) |
DOI: | 10.1039/C7GC03436A |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © The Royal Society of Chemistry 2018 |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1039/C7GC03436A |
Aparece en las colecciones: | INV - MATCAT - Artículos de Revistas |
Archivos en este ítem:
Archivo | Descripción | Tamaño | Formato | |
---|---|---|---|---|
2018_Albaladejo_etal_GreenChem_final.pdf | Versión final (acceso restringido) | 3,08 MB | Adobe PDF | Abrir Solicitar una copia |
2018_Albaladejo_etal_GreenChem_accepted.pdf | Accepted Manuscript (acceso abierto) | 2,05 MB | Adobe PDF | Abrir Vista previa |
Todos los documentos en RUA están protegidos por derechos de autor. Algunos derechos reservados.