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Listar por palabra clave "Organocatalysis"

Mostrando ítems 1-17 de 17

A Bifunctional Photoaminocatalyst for the Alkylation of Aldehydes: Design, Analysis, and Mechanistic Studies

Rigotti, Thomas; Casado Sánchez, Antonio; Cabrera, Silvia; Pérez-Ruiz, Raúl; Líras, Marta; De la Peña-O'Shea, Víctor; Alemán, José (American Chemical Society, 2018-07)

[EN] A bifunctional photoaminocatalyst based on imidazolidinone and thioxanthone is presented. The preparation of these catalysts proceeds in a two-step synthesis that allows an easy tuning of the steric properties. The ...
A powerful chiral counteranion motif for asymmetric catalysis

García García, Pilar; Lay, Frank; Garcia Garcia, Patricia; Rabalakos, Constantinos; List, Benjamin (Wiley, 2009)
Asymmetric counteranion-directed catalytic hosomi-sakurai reaction

Mahlau, Manuel; García García, Pilar; List, Benjamin (Wiley-VCH Verlag, 2012)

[EN] Counteranion control enables the enantioselective, organo Lewis acid catalyzed Hosomi¿Sakurai reaction of (hetero)aromatic aldehydes and allylsilanes using an easily handled disulfonimide precatalyst (see scheme). The ...
Asymmetric epoxidation of electron-deficient olefins

Diez, D.; Nunez, M.G.; Anton, A.B.; García García, Pilar; Moro, R.F.; Garrido, N. M.; Marcos, I.S.; Basabe, P.; Urones, J.G. (Bentham Science Publishers, 2008-08)

[EN] This paper focuses on the latest developments in asymmetric epoxidation of electron-deficient olefins since the review by Porter and Skidmore on chiral ligand-metal peroxide systems, polyamino acid catalysed and ...
Atmospheric-pressure, liquid-phase, selective aerobic oxidation of alkanes catalysed by metal-organic frameworks

Dhakshinamoorthy, Amarajothi; Alvaro Rodríguez, Maria Mercedes; García Gómez, Hermenegildo (Wiley-VCH Verlag, 2011-04-14)

[EN] Aerobic oxidation of cyclooctane to its corresponding ol/one mixture at atmospheric pressure and in the liquid phase is efficiently promoted by an Fe(BTC) (BTC=1,3,5-benzenetricarboxylate) metal-organic framework, ...
Bifunctional acid-base ionic liquid for the one-pot synthesis of fine chemicals: thioethers, 2H-chromenes and 2H-quinoline derivatives

Climent Olmedo, María José; Iborra Chornet, Sara; Sabater Picot, Mª José; Vidal Castro, Juan Diego (Elsevier, 2014-07-05)

A bifunctional organocatalyst with ionic liquid properties and with an optimized distance between the acid and basic sites efficiently activates electron deficient olefins for 1,4 conjugated addition, which can be incorporated ...
Challenges and opportunities for N-hydroxyphthalimide supported over heterogeneous solids for aerobic oxidations

Caruso, Manfredi; Navalón Oltra, Sergio; Cametti, Massimo; Dhakshinamoorthy, Amarajothi; Punta, Carlo; García Gómez, Hermenegildo (Elsevier, 2023-07-01)

[EN] Organocatalysis, in combination with, or as an alternative to the use of metals, is attracting increasing interest as a sustainable route to promote selective transformations. In this context, N- hydroxyphthalimide ...
Organocatalytic Asymmetric Addition of Naphthols and Electron-Rich Phenols to Isatin-Derived Ketimines: Highly Enantioselective Construction of Tetrasubstituted Stereocenters

Montesinos Magraner, Marc; Vila, Carlos; Cantón, Rubén; Blay, Gonzalo; Fernández, Isabel; Muñoz Roca, María del Carmen; Pedro, José R. (Wiley, 2015)

A quinine-derived thiourea organocatalyst promoted the highly enantioselective addition of naphthols and activated phenols to ketimines derived from isatins. The reaction afforded chiral 3-amino-2-oxindoles with a ...
Organocatalytic Enantioselective Alkylation of Pyrazol-3-ones with Isatin-Derived Ketimines: Stereocontrolled Construction of Vicinal Tetrasubstituted Stereocenters

Amr, Fares Ibrahim; Vila, Carlos; Blay, Gonzalo; Muñoz Roca, María del Carmen; Pedro, José R. (Wiley, 2016-05-19)

A quinine-derived thiourea catalysed the enantioselective addition of 4-substituted pyrazolones to isatin-derived ketimines, providing a variety of aminooxindole-pyrazolone adducts containing congested vicinal ...
Organocatalytic Enantioselective Friedel-Crafts Alkylation of 1-Naphthol Derivatives and Activated Phenols with Ethyl Trifluoropyruvate

Montesinos Magraner, Marc; Vila, Carlos; Blay, Gonzalo; Fernández, Isabel; Muñoz Roca, María del Carmen; Pedro, José R. (Wiley, 2015-10-12)

An organocatalytic enantioselective Friedel–Crafts alkylation of a series of substituted 1- naphthol derivatives and activated phenols with ethyl trifluoropyruvate, catalyzed by a quinine-derived squaramide, is presented. ...
Organocatalytic Enantioselective Friedel-Crafts Aminoalkylation of Indoles in the Carbocyclic Ring

Montesinos Magraner, Marc; Vila, Carlos; Rendón Patiño, Alejandra; Blay, Gonzalo; Fernández, Isabel; Muñoz Roca, María del Carmen; Pedro, José R. (American Chemical Society, 2016)

The first general catalytic method for the, so far elusive, enantioselective Friedel−Crafts functionalization of indoles in the carbocyclic ring is presented. This transformation contrasts with the usual tendency of these ...
Organocatalytic Enantioselective Strecker Reaction with Seven-Membered Cyclic Imines

Lluna Galán, C.; Blay, G.; Fernández, I.; Muñoz Roca, María Del Carmen; Pedro, J. R.; Vila, C. (John Wiley & Sons, 2018)

[EN] A highly enantioselective Strecker reaction with dibenzo[b,f][1,4]oxazepines has been described using a dihydroquinine-derived thiourea as organocatalyst. The reaction affords chiral 10,11-dihydrodibenzo[b,f][1,4] ...
Organocatalytic Enantioselective Synthesis of Pyrazoles Bearing a Quaternary Stereocenter

Vila, Carlos; Amr, Fares Ibrahim; Blay, Gonzalo; Muñoz Roca, María del Carmen; Pedro, José R. (Wiley, 2016-05-20)

An efficient one-pot asymmetric synthesis of pyrazoles bearing a chiral quaternary stereocenter has been developed. Quinine-derived thiourea catalyzed the enantioselective addition of pyrazolones to isatin-derived ketimines, ...
Rational Design of Simple Organocatalysts for the HSiCl3 Enantioselective Reduction of (E)-N-(1-Phenylethylidene)aniline

Maciá, María; Porcar, Raúl; Martí-Centelles, Vicente; García-Verdugo, Eduardo; Burguete, Maria Isabel; Luis, Santiago V. (MDPI AG, 2021-11)

[EN] Prolinamides are well-known organocatalysts for the HSiCl3 reduction of imines; however, custom design of catalysts is based on trial-and-error experiments. In this work, we have used a combination of computational ...
Regio-, Diastereo-, and Enantioselective Organocatalytic Addition of 4-Substituted Pyrazolones to Isatin-Dereved Nitroalkenes

Vila, C.; Dharmaraj, N. R.; Faubel, A.; Blay, G.; Cardona, M. L.; Muñoz Roca, María Del Carmen; Pedro, J. R. (John Wiley & Sons, 2019-05-26)

[EN] Hydroquinine 2,5-diphenyl-4,6-pyrimidinediyl diether [(DHQ)(2)Pyr] catalyzed the regio-, diastereo-, and enantioselective addition of 4-substituted pyrazolones to isatin-derived nitroalkenes, providing a variety of ...
Synthesis of structured porous polymers with acid and basic sites and their catalytic application in cascade-type reactions

Merino Marcos, Estibaliz; Verde-Sesto, Ester; Maya, Eva M.; Iglesias, Marta; Sanchez, Felix; Corma Canós, Avelino (American Chemical Society, 2013-03-26)

[EN] We described the use of one porous polymeric aromatic framework (PPAF) with a 9,9'-spiro-bisfluorene unit as a support in heterogeneous catalysis. The material was functionalized with acid and base active sites and ...
Visible Light-Gated Organocatalysis Using a Ru-II-Photocage

González-Delgado, José A.; Romero, Miguel A.; Bosca Mayans, Francisco; Arteaga, Jesús F.; Pischel, Uwe (John Wiley & Sons, 2020-11-06)

[EN] The light-gated organocatalysis via the release of 4-N,N-dimethylaminopyridine (DMAP) by irradiation of the [Ru(bpy)(2)(DMAP)(2)](2+)complex with visible light was investigated. As model reaction the acetylation of ...