Autor segons l'article: Herle, Bart; Holstein, Philipp M.; Echavarren, Antonio M.;
Departament: Química Analítica i Química Orgànica
Autor/s de la URV: ECHAVARREN PABLOS, ANTONIO
Paraules clau: Vinylcyclopropanes Retro-buchner reaction Gold catalysis Cyclopropanation Cycloheptatrienes retro-buchner reaction gold catalysis cyclopropanation cycloheptatrienes
Resum: A highly stereoselective gold(I)-catalyzed cis-vinylcyclopropanation of alkenes has been developed. Allylic gold carbenes, generated via a retro-Buchner reaction of 7-alkenyl-1,3,5-cycloheptatrienes, react with alkenes to form vinylcyclopropanes. The gold(I)-catalyzed retro-Buchner reaction of these substrates proceeds by simple heating at a temperature much lower than that required for the reaction of 7-aryl-1,3,5-cycloheptatrienes (75 °C vs 120 °C). A newly developed Julia-Kocienski reagent enables the synthesis of the required cycloheptatriene derivatives in one step from readily available aldehydes or ketones. On the basis of mechanistic investigations, a stereochemical model for the cis selectivity was proposed. An unprecedented gold-catalyzed isomerization of cis- to trans-cyclopropanes has also been discovered and studied by DFT calculations.
Àrees temàtiques: Química Materiais Interdisciplinar General chemistry Engenharias ii Ciências agrárias i Chemistry, physical Chemistry (miscellaneous) Chemistry (all) Catalysis Astronomia / física
Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
Adreça de correu electrònic de l'autor: antoniomaria.echavarren@urv.cat
Identificador de l'autor: 0000-0002-6418-7930
Data d'alta del registre: 2022-07-23
Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
Enllaç font original: https://pubs.acs.org/doi/10.1021/acscatal.7b00737
URL Document de llicència: http://repositori.urv.cat/ca/proteccio-de-dades/
Referència a l'article segons font original: Acs Catalysis. 7 (5): 3668-3675
Referència de l'ítem segons les normes APA: Herle, Bart; Holstein, Philipp M.; Echavarren, Antonio M.; (2017). Stereoselective cis-Vinylcyclopropanation via a Gold(I)-Catalyzed Retro-Buchner Reaction under Mild Conditions. Acs Catalysis, 7(5), 3668-3675. DOI: 10.1021/acscatal.7b00737
DOI de l'article: 10.1021/acscatal.7b00737
Entitat: Universitat Rovira i Virgili
Any de publicació de la revista: 2017
Tipus de publicació: Journal Publications
Repositori URV