Reactivity of Metallophosphide Anions with Electrophilic (Arene)tricarbonylmetal Complexes
作者:Virginie Comte、Jean Philippe Tranchier、Françoise Rose‐Munch、Eric Rose、Danièle Perrey、Philippe Richard、Claude Moïse
DOI:10.1002/ejic.200200531
日期:2003.5
Reaction of metallophosphideanions [(CO)xM′PPh2]− (M′ = Cr, Fe) with neutral tricarbonyl(η6-fluoroarene)chromium and cationic (η6-arene)tricarbonylmanganese complexes give rise to the formation of dinuclear complexes. These complexes are obtained either by substitution of the fluoride anion in the (arene)chromium complexes, or by addition to the ring in the (arene)manganese complexes. The X-ray structure
treated with potassium t-butoxide in dimethyl sulphoxide the chromium tricarbonyl complex of 3-(2-fluorophenyl)propan-1-ol underwent a rapid intramolecular nucleophilic substitution to give the corresponding complex of chroman, from which the heterocycle was obtained by oxidation with iodine. With metal alkoxides the chromium tricarbonyl complex of 2-(2-fluorophenyl)ethanol gave either mixtures (from which
Ag/Pd Cocatalyzed Direct Arylation of Fluoroarene Derivatives with Aryl Bromides
作者:Adyasha Panigrahi、Daniel Whitaker、Iñigo J. Vitorica-Yrezabal、Igor Larrosa
DOI:10.1021/acscatal.9b05334
日期:2020.2.7
these functionalizations. However, all of these processes are limited by the wasteful requirement for (super)stoichiometric Ag(I) salts. Herein, we report the development of a Ag/Pd cocatalyzed directarylation of (fluoroarene) chromium tricarbonyl complexes with bromoarenes. The small organic salt, NMe4OC(CF3)3, added as a halide abstractor, enables the use of a catalytic amount of Ag, reversing the
A strategy for assembling biaryls linked through a medium‐sized ring is herein presented. π‐Complexation of fluoroarenes to chromium tricarbonyl activates the molecule towards both C−H activation and nucleophilic aromatic substitution without covalently altering the molecular connectivity of the arene. The construction of bridged biaryl molecules with 6–10‐membered core rings is achieved through a