Výsledky vyhledávání - "Alberto Cayuelas"

Reactivity of 1,2-Diaza-1,3-dienes with Azomethine Ylides: [3+4] versus [3+2] Cycloadditions

Autor: Alberto Cayuelas, Fabio Mantellini, Gianfranco Favi, Carmen Nájera, Serena Mantenuto, José M. Sansano, Orazio A. Attanasi

Publikováno v: European Journal of Organic Chemistry. 2016:4144-4151

The Spanish authors thank the Spanish Ministerio de Ciencia e Innovacion (MICINN) (projects CTQ2010-20387, and Consolider Ingenio 2010, CSD2007-00006), the Spanish Ministerio de Economia y Competitividad (MINECO) (projects CTQ2013-43446-P, and CTQ201

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cfe9fe284a7bc5bb9ede3e21d6a5d096
https://doi.org/10.1002/ejoc.201600640

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Cooperative Catalysis with Coupled Chiral Induction in 1,3‐Dipolar Cycloadditions of Azomethine Ylides

Autor: Abel de Cózar, Alberto Cayuelas, Olatz Larrañaga, Carmen Nájera, Verónica Selva, José M. Sansano, José I. Miranda, Fernando P. Cossío, Takahiko Akiyama

Publikováno v: RUA. Repositorio Institucional de la Universidad de Alicante
Universidad de Alicante (UA)

1,3‐Dipolar cycloadditions (1,3‐DC) between imino esters (as precursors of N‐metallated azomethine ylides) and π‐deficient alkenes are promoted by cooperative asymmetric Lewis acid/Brønsted base catalysis. The components of these catalytic

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8e088df552d143e0bc2333b1ac874259
https://hdl.handle.net/10045/76312

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Silver-catalysed multicomponent 1,3-dipolar cycloaddition of 2-oxoaldehydes-derived azomethine ylides

Autor: Juan Mancebo-Aracil, Carmen Nájera, Alberto Cayuelas, José M. Sansano

Publikováno v: RUA. Repositorio Institucional de la Universidad de Alicante
Universidad de Alicante (UA)

The silver-catalysed multicomponent reaction between ethyl glyoxylate, 2,2-dimethoxyacetaldehyde, or phenylglyoxal as aldehyde components with a α-amino ester hydrochloride and a dipolarophile in the presence of triethylamine is described. This domi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1261e5b1a5ed790281d91becb4dacd1d
https://doi.org/10.1016/j.tet.2015.09.039

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Synthesis of α,β-diamino acid derivatives via asymmetric Mannich reactions of glycine imino esters catalyzed by a chiral phosphoramidite·silver complex

Autor: José M. Sansano, Carmen Nájera, Loane Serrano, Alberto Cayuelas

Publikováno v: RUA. Repositorio Institucional de la Universidad de Alicante
Universidad de Alicante (UA)

AgOTf·phosphoramidite complexes efficiently catalyze the enantioselective Mannich-type reaction between benzophenone-imine glycine methyl ester and N-tosyl aldimines in the absence of a base. The corresponding syn-adducts, which are the direct precu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::61c8005e03eaf804a2bcbb4541ddf3b6
https://doi.org/10.1016/j.tetasy.2014.11.009

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ChemInform Abstract: Enantioselective Synthesis of Polysubstituted Spiro-nitroprolinates Mediated by a (R,R)-Me-DuPhos·AgF-Catalyzed 1,3-Dipolar Cycloaddition

Autor: José M. Sansano, Ricardo Ortiz, Carmen Nájera, Abel de Cózar, Alberto Cayuelas, Olatz Larrañaga, Fernando P. Cossío

Publikováno v: ChemInform. 47

The synthesis of constrained spirocycles is achieved effectively by means of 1,3-dipolar cyclodditions employing α-imino γ-lactones as azomethine ylide precursors and nitroalkenes as dipolarophiles. The complex formed by (R,R)-Me-DuPhos 18 and AgF

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3174a9eee7c57098c5570f9eab346997
https://doi.org/10.1002/chin.201644097

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ChemInform Abstract: Silver-Catalyzed Multicomponent 1,3-Dipolar Cycloaddition of 2-Oxoaldehydes-Derived Azomethine Ylides

Autor: Juan Mancebo-Aracil, José M. Sansano, Alberto Cayuelas, Carmen Nájera

Publikováno v: ChemInform. 47

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b16debdd4c670a45637681216076af4b
https://doi.org/10.1002/chin.201609029

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Taniaphos·AgF-catalyzed enantioselective 1,3-dipolar cycloaddition of stabilized azomethine ylides derived from 2,2-dimethoxyacetaldehyde

Autor: Alberto Cayuelas, Fernando P. Cossío, Olatz Larrañaga, Carmen Nájera, José M. Sansano, Abel de Cózar

Publikováno v: RUA. Repositorio Institucional de la Universidad de Alicante
Universidad de Alicante (UA)

The enantioselective Taniaphos·silver fluoride-catalyzed enantioselective 1,3-dipolar cycloaddition using 2,2-dimethoxyacetaldehyde derived imino esters and maleimides is described. The employment of this complex allows the reaction in the absence o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eb531a9289587d08d8c5982042f40d0a
http://hdl.handle.net/10045/58071

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ChemInform Abstract: Synthesis of α,β-Diamino Acid Derivatives via Asymmetric Mannich Reactions of Glycine Imino Esters Catalyzed by a Chiral Phosphoramidite·Silver Complex

Autor: Alberto Cayuelas, José M. Sansano, Carmen Nájera, Loane Serrano

Publikováno v: ChemInform. 46

AgOTf·phosphoramidite complexes efficiently catalyze the enantioselective Mannich-type reaction between benzophenone-imine glycine methyl ester and N -tosyl aldimines in the absence of a base. The corresponding syn -adducts, which are the direct pre

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e8b90401dce25201ff3d49f4d4aeaeab
https://doi.org/10.1002/chin.201519080

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