Search Results - "de Gracia Retamosa, María"

Recent Development in Palladium-Catalyzed Domino Reactions: Access to Materials and Biologically Important Carbo- and Heterocycles by Döndaş, H. Ali, Retamosa, María de Gracia, Sansano, José M

“…The chemistry of palladium complexes has no limits. Many domino processes (even multicomponent) are continuously appearing in the literature. Carbocyclic and…”
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Densely Substituted l‑Proline Esters as Catalysts for Asymmetric Michael Additions of Ketones to Nitroalkenes by Ruiz-Olalla, Andrea, Retamosa, María de Gracia, Cossío, Fernando P

“…Homochiral methyl 4-aminopyrrolidine-2-carboxylates are readily obtained by means of asymmetric (3 + 2) cycloadditions between azomethine ylides and…”
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Pyridine‐Hydrazone Ligands in Asymmetric Palladium‐Catalyzed 1,4‐ and 1,6‐Additions of Arylboronic Acids to Cyclic (Di)enones by de Gracia Retamosa, María, Álvarez‐Casao, Yolanda, Matador, Esteban, Gómez, Ángela, Monge, David, Fernández, Rosario, Lassaletta, José M.

“…Catalysts generated by combinations of Pd(TFA)2 and enantiomerically pure pyridine‐hydrazone ligands have been applied to the 1,4‐addition of arylboronic acids…”
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Synthesis of Prolines by Enantioselective 1,3-Dipolar Cycloaddition of Azomethine Ylides and Alkenes Catalyzed by Chiral Phosphoramidite-Silver(I) Complexes by Nájera, Carmen, de Gracia Retamosa, María, Martín-Rodríguez, María, Sansano, José M., de Cózar, Abel, Cossío, Fernando P.

“…The endo‐diastereo‐ and enantioselective 1,3‐dipolar cycloaddition of azomethine ylides and electrophilic alkenes is efficiently catalysed by chiral…”
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Asymmetric Remote Aldol Cyclization Reaction to Synthesize Trifluoromethylated Heterospirocyclic Frameworks by Trujillo-Sierra, José, Sansano, José Miguel, Pardos, Jorge, Tejero, Tomás, Merino, Pedro, Retamosa, María de Gracia

“…The highly enantioselective organocatalytic synthesis of dihydropyran spirocyclic compounds bearing di- and trifluoromethyl groups by aldol cyclization…”
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Stereoselective Synthesis of Densely Substituted Pyrrolidines via a [3 + 2] Cycloaddition Reaction between Chiral N-tert-Butanesulfinylazadienes and Azomethine Ylides by Blanco-López, Ester, Foubelo, Francisco, Retamosa, María de Gracia, Sansano, José M.

“…The N-tert-butanesulfinylimine group behaves as a suitable electron-withdrawing group in 1-azadienes, allowing the diastereoselective synthesis of densely…”
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Synthesis of Bicyclic Hemiacetals Catalyzed by Unnatural Densely Substituted γ‑Dipeptides by Agirre, Maddalen, Bello, Tamara, Zhou, Jinxiu, Retamosa, María de Gracia, Cossío, Fernando P.

“…The asymmetric synthesis of bicyclic highly substituted tetrahydropyrans is described. The reaction is catalyzed by unnatural γ-dipeptides based on densely…”
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Remote Asymmetric Bisvinylogous [4+2] Cycloaddition Reaction to Synthesize Spirocyclic Frameworks by Hidalgo‐León, Raquel, Alberro, Nerea, Cossío, Fernando P., Miguel Sansano, José, de Gracia Retamosa, María

“…The highly enantioselective organocatalytic synthesis of spirocyclic compounds by Diels‐Alder reactions via trienamine using cyclic 2,5‐dienones as…”
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Phosphine Catalyzed Michael-Type Additions: The Synthesis of Glutamic Acid Derivatives from Arylidene- α -amino Esters by Rodríguez-Flórez, Lesly V, González-Marcos, María, García-Mingüens, Eduardo, Retamosa, María de Gracia, Kawase, Misa, Selva, Elisabet, Sansano, José M

“…The reaction of arylidene-α-amino esters with electrophilic alkenes to yield Michael-type addition compounds is optimized using several phosphines as…”
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Asymmetric Organocatalytic Synthesis of Fluorinated β‐Hydroxy Diazenes by Matador, Esteban, de Gracia Retamosa, María, Jiménez‐Sánchez, Antonio, Monge, David, Fernández, Rosario, Lassaletta, José M.

“…The nucleophilic addition of formaldehyde tert‐butyl hydrazone to fluoromethyl ketones provides a valuable tool for the synthesis of highly functionalized…”
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Hydrazones as Singular Reagents in Asymmetric Organocatalysis by de Gracia Retamosa, María, Matador, Esteban, Monge, David, Lassaletta, José M., Fernández, Rosario

“…This Minireview summarizes strategies and developments regarding the use of hydrazones as reagents in asymmetric organocatalysis, their distinct roles in…”
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Dual chiral silver catalyst in the synthetic approach to the core of hepatitis C virus inhibitor GSK 625433 using enantioselective 1,3-dipolar cycloaddition of azomethine ylides and electrophilic alkenes by Chabour, Ihssene, Castelló, Luis M., Mancebo-Aracil, Juan, Martín-Rodríguez, María, de Gracia Retamosa, María, Nájera, Carmen, Sansano, José M.

“…[Display omitted] The asymmetric 1,3-dipolar cycloaddition of an imino ester 5 with tert-butyl acrylate is catalyzed by a dual chiral silver(I) complex formed…”
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A Three‐Component Enantioselective Cyclization Reaction Catalyzed by an Unnatural Amino Acid Derivative by de Gracia Retamosa, María, Ruiz‐Olalla, Andrea, Bello, Tamara, de Cózar, Abel, Cossío, Fernando P.

“…A new diastereo‐ and enantioselective three‐component cyclization reaction is described. The reaction takes place between a ketone, a carboxylic acid, and a…”
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Bifunctional Squaramide Organocatalysts for the Asymmetric Addition of Formaldehyde tert‐Butylhydrazone to Simple Aldehydes by Matador, Esteban, de Gracia Retamosa, María, Monge, David, Iglesias‐Sigüenza, Javier, Fernández, Rosario, Lassaletta, José M.

“…The nucleophilic addition of formaldehyde tert‐butylhydrazone to simple aldehydes (a formal hetero‐carbonyl–ene reaction) can be performed with good reactivity…”
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Preparation of a ruthenium complex covalently bonded to multilayer graphene and its evaluation as a photocatalyst by Rodríguez-Flórez, Lesly V, de Gracia Retamosa, María, Navlani-García, Miriam, Cazorla-Amorós, Diego, Nájera, Carmen, Yus, Miguel, Sansano, José M

“…Multilayer graphene ( MLG ), obtained by mild sonication of graphite in NMP, was functionalised via 1,3-dipolar cycloaddition with azomethine ylides generated…”
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Biological properties and conformational studies of amphiphilic Pd(II) and Ni(II) complexes bearing functionalized aroylaminocarbo- N -thioylpyrrolinate units by Poyraz, Samet, Belveren, Samet, Aydınoğlu, Sabriye, Ulger, Mahmut, de Cózar, Abel, de Gracia Retamosa, Maria, Sansano, Jose M, Döndaş, H Ali

“…A series of novel palladium(II) and nickel(II) complexes of multifunctionalized aroylaminocarbo- -thioylpyrrolinates were synthesized and characterized by…”
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A Three‐Component Enantioselective Cyclization Reaction Catalyzed by an Unnatural Amino Acid Derivative by de Gracia Retamosa, María, Ruiz‐Olalla, Andrea, Bello, Tamara, de Cózar, Abel, Cossío, Fernando P.

“…A new diastereo‐ and enantioselective three‐component cyclization reaction is described. The reaction takes place between a ketone, a carboxylic acid, and a…”
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Additive and Emergent Catalytic Properties of Dimeric Unnatural Amino Acid Derivatives: Aldol and Conjugate Additions by Gracia Retamosa, María, Ruiz‐Olalla, Andrea, Agirre, Maddalen, Cózar, Abel, Bello, Tamara, Cossío, Fernando P.

“…Different densely substituted L‐ and D‐proline esters were prepared by asymmetric (3+2) cycloaddition reactions catalyzed by conveniently selected EhuPhos…”
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Widening the antimicrobial spectrum of esters of bicyclic amines: In vitro effect on gram-positive Streptococcus pneumoniae and gram-negative non-typeable Haemophilus influenzae biofilms by Roig-Molina, Emma, Domenech, Mirian, Retamosa, María de Gracia, Nácher-Vázquez, Montserrat, Rivas, Luis, Maestro, Beatriz, García, Pedro, García, Ernesto, Sanz, Jesús M.

“…Antibiotic resistance is a global current threat of increasing importance. Moreover, biofilms represent a medical challenge since the inherent antibiotic…”
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Remote Substituent Effects on the Stereoselectivity and Organocatalytic Activity of Densely Substituted Unnatural Proline Esters in Aldol Reactions by de Gracia Retamosa, María, de Cózar, Abel, Sánchez, Mirian, Miranda, José I., Sansano, José M., Castelló, Luis M., Nájera, Carmen, Jiménez, Ana I., Sayago, Francisco J., Cativiela, Carlos, Cossío, Fernando P.

“…The organocatalytic activities of highly substituted proline esters obtained through asymmetric [3+2] cycloadditions of azomethine ylides derived from glycine…”
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