Browsing QO-Artigos by Author "41cbe2cb-bd29-4bd9-8276-539fc0645d4b"
Now showing items 1-7 of 7
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Axially Chiral Triazoloisoquinolin-3-ylidene Ligands in Gold(I)-Catalyzed Asymmetric Intermolecular (4 + 2) Cycloadditions of Allenamides and Dienes
Francos Arias, Javier; Grande-Carmona, Francisca; Faustino, Hélio; Iglesias Sigüenza, Francisco Javier; Díez Martín, Elena; Alonso García, Isaac; Fernández Fernández, Rosario Fátima; Lassaletta, José M.; López García, Fernando; Mascareñas Cid, José Luis (American Chemical Society, 2012)The first highly enantioselective intermolecular (4 + 2) cycloaddition between allenes and dienes is reported. The reaction provides good yields of optically active cyclohexenes featuring diverse substitution patterns and ... -
Gold(I)-catalyzed [2 + 2 + 2] cycloaddition of allenamides, alkenes and aldehydes: a straightforward approach to tetrahydropyrans
Faustino, Hélio; Varela Sandá, Iván; Mascareñas Cid, José Luis; López García, Fernando (Royal Society of Chemistry, 2015-03-02)Allenamides participate as two-carbon components in an intermolecular [2 + 2 + 2] cycloaddition with alkenes and aldehydes when treated with catalytic amounts of a phosphite gold complex. The reaction is highly regio- and ... -
Gold(I)-Catalyzed Enantioselective [2+2+2] Cycloadditions: An Expedient Entry to Enantioenriched Tetrahydropyran Scaffolds
Varela Sandá, Iván; Faustino, Hélio; Díez Martín, Elena; Iglesias Sigüenza, Francisco Javier; Grande-Carmona, Francisca; Fernández, Rosario; Lassaletta, José M.; Mascareñas Cid, José Luis; López García, Fernando (American Chemical Society, 2017-02-22)A straightforward and atom-economical enantioselective approach to highly substituted tetrahydropyrans is reported. The process, which consists of an intermolecular gold-catalyzed [2+2+2] cycloaddition between allenamides, ... -
Gold(I)-Catalyzed Intermolecular Cycloaddition of Allenamides with α,β-Unsaturated Hydrazones: Efficient Access to Highly Substituted Cyclobutanes
Bernal Albert, Paloma; Faustino, Hélio; Gimeno, Ana; Asensio, Gregorio; Mascareñas Cid, José Luis; López García, Fernando (American Chemical Society, 2014-11-19)α,β-Unsaturated N,N-dialkyl hydrazones undergo a mild [2 + 2] cycloaddition to allenamides when treated with a suitable gold catalyst. The method, which represents the first application of N,N-dialkyl hydrazones in gold ... -
Gold(I)‐Catalyzed Cascade Cycloadditions between Allenamides and Carbonyl‐Tethered Alkenes: An Enantioselective Approach to Oxa‐Bridged Medium‐Sized Carbocycles
Faustino, Hélio; Alonso García, Isaac; Mascareñas Cid, José Luis; López García, Fernando (Wiley, 2013)Gold standard: Allenamides react with aldehydes or ketones having γ, δ, or ε alkenyl groups, upon activation with suitable gold catalysts, to provide oxa-bridged systems containing seven- to nine-membered carbocycles, in ... -
Gold(I)‐Catalyzed Intermolecular [2+2] Cycloadditions between Allenamides and Alkenes
Faustino, Hélio; Bernal Albert, Paloma; Castedo Expósito, José Luis; López García, Fernando; Mascareñas Cid, José Luis (Wiley, 2012)3‐(Propa‐1,2‐dien‐1‐yl)oxazolidin‐2‐one works as an efficient two‐carbon partner in a variety of intermolecular gold‐catalyzed [2+2] cycloadditions to alkenes. The transformation represents a simple and practical entry to ... -
Ruthenium-Catalyzed Azide–Thioalkyne Cycloadditions in Aqueous Media: A Mild, Orthogonal, and Biocompatible Chemical Ligation
Destito, Paolo; Rodríguez Couceiro, José; Faustino, Hélio; López García, Fernando; Mascareñas Cid, José Luis (Wiley, 2017-08-03)The development of efficient metal-promoted bioorthogonal ligations remains as a major scientific challenge. Demonstrated herein is that azides undergo efficient and regioselective room-temperature annulations with thioalkynes ...