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Your search keyword '"López, Fernando"' showing total 2 results
Start Over Author "López, Fernando" Topic allenamides Publisher american chemical society
2 results on '"López, Fernando"'

1. Gold(I)-Catalyzed Intermolecular Cycloaddition ofAllenamides with α,β-Unsaturated Hydrazones: EfficientAccess to Highly Substituted Cyclobutanes.

Author

Bernal-Albert, Paloma, Faustino, Hélio, Gimeno, Ana, Asensio, Gregorio, Mascareñas, José L., and López, Fernando

Subjects
*GOLD catalysts, *RING formation (Chemistry), *ALLENAMIDES, *UNSATURATED compounds, *HYDRAZONES, *CYCLOBUTANE
Abstract

α,β-Unsaturated N,N-dialkyl hydrazones undergo a mild [2+ 2] cycloaddition to allenamideswhen treated with a suitable gold catalyst. The method, which representsthe first application of N,N-dialkylhydrazones in gold catalysis, is compatible with a wide variety ofsubstituents at the alkenyl moiety of the hydrazone component, proceedswith excellent levels of regio- and diastereoselectivity, and providesdensely substituted cyclobutanes with good to excellent yields. [ABSTRACT FROM AUTHOR]

Published
2014
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2. Axially Chiral Triazoloisoquinolin-3-ylidene Ligands in Gold(I)-Catalyzed Asymmetric Intermolecular (4 + 2) Cycloadditions of Allenamides and Dienes.

Author

Francos, Javier, Grande-Carmona, Francisca, Faustino, Hélio, Iglesias-Sigüenza, Javier, Díez, Elena, Alonso, Isaac, Fernández, Rosario, Lassaletta, José M., López, Fernando, and José L. Mascareñas

Subjects
*LIGANDS (Chemistry), *GOLD catalysts, *RING formation (Chemistry), *ALLENAMIDES, *DIOLEFINS, *ENANTIOSELECTIVE catalysis, *CHIRALITY, *CYCLOBUTANE
Abstract

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 up to three stereocenters. Key to the success of the process is the use of newly designed axially chiral N-heterocyclic carbene-gold catalysts. [ABSTRACT FROM AUTHOR]

Published
2012
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