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Listar por palabra clave "Michael addition"

Mostrando ítems 1-6 de 6

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 ...
Enantioselective LaIII-pyBOX-Catalyzed Nitro-Michael Addition to (E)-2-Azachalcones

Blay Llinares, Gonzalo; Incerti, Celia; Muñoz Roca, María del Carmen; Pedro Llinares, Jose Ramón (Wiley-VCH Verlag, 2013-03)

A [La(OTf)3] complex with a new pyBOX ligand bearing a bulky 1-naphthylmethyl substituent at the 4-position of the oxazoline ring catalyzes the conjugate addition of nitroalkanes to a broad range of (E)-2-azachalcones, ...
Graphene Film-Supported Oriented 1.1.1 Gold(0) Versus 2.0.0 Copper(I) Nanoplatelets as Very Efficient Catalysts for Coupling Reactions

Candu, Natalia; Simion, Andrada; Coman, Simona M.; Primo Arnau, Ana Maria; Esteve-Adell, Iván; Parvulescu, Vasile I.; García Gómez, Hermenegildo (Springer-Verlag, 2018)

[EN] Few-layered graphene-supported 1.1.1 and 2.0.0 oriented Au and Cu2O nanoplatelets were prepared by one-step pyrolysis of the corresponding metal salts embedded in chitosan at 900 degrees C under inert atmosphere. These ...
Highly ordered acid functionalized SBA-15: a novel organocatalyst for the preparation of xanthenes

Nandi, Mahasweta; Mondal, John; Sarkar, Krishanu; Yamauchi, Yusuke; Bhaumik, Asim (Royal Society of Chemistry, 2011)

[EN] Post-synthesis modification of SBA-15 has been carried out to design highly ordered acid functionalized hybrid mesoporous organosilica, AFS-1. This material has been used as an efficient heterogeneous organocatalyst ...
Influence of the Framework Topology on the Reactivity of Chiral Pyrrolidine Units Inserted in Different Porous Organosilicas

Llopis-Perez, Sebastian; Velty, Alexandra; DÍAZ MORALES, URBANO MANUEL (MDPI AG, 2019-08)

[EN] Three families of organosiliceous materials with different structuration level, order, and textural properties (non-ordered, M41S, and SBA-15 type materials) were prepared incorporating in their structural framework ...
Lanthanum-pyBOX complexes as catalysts for the enantioselective conjugate addition of malonate esters to beta-gamma-unsaturated alfa-ketimino esters

Espinosa, M.; Blay, G.; Cardona, L.; Fernández, I.; Muñoz Roca, María Del Carmen; Pedro, J.R. (Taylor & Francis, 2018)

[EN] In this paper, we report the application of chiral complexes of La(III) with pyBOX ligands as Lewis acid catalysts in the conjugate addition of malonic esters to N-tosyl imines derived from ß,gamma-unsaturated alfa-keto ...