Thesis Collection
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Browsing by Author "Díaz Requejo, María Mar"
Now showing items 1-20 of 28
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A competing, dual mechanism for catalytic direct benzene hydroxylation from combined experimental-DFT studies
Vilella, Laia; Conde Alcántara, Ana Isabel; Ballcells, David; Díaz Requejo, María Mar
; Lledós, Agustín; Pérez Romero, Pedro José (Royal Society of Chemistry, 2017)
A dual mechanism for direct benzene catalytic hydroxylation is described. Experimental studies and DFT calculations have provided a mechanistic explanation for the acid-free, TpxCu-catalyzed hydroxylation of benzene with ... -
Catalytic cyclopropanation of polybutadienes
Urbano Baena, Juan; Korthals, Brigitte; Díaz Requejo, María Mar; Pérez Romero, Pedro José; Mecking, Stefan (Wiley, 2010)
Catalytic cyclopropanation of commercial 1,2- or 1,4- cis -polybutadiene, respectively, with ethyl diazoacetate catalyzed by [Tp Br3 Cu(NCMe)] (Tp Br3 ¼ hydrotris(3,4,5-tribromo-1-pyrazo- lyl)borate) at room ... -
Catalytic Nitrene Transfer To Alkynes: A Novel and Versatile Route for the Synthesis of Sulfinamides and Isothiazoles
Rodríguez, Manuel R.; Beltrán Martín, Álvaro; Mudarra, Ángel L.; Álvarez, Eleuterio; Maseras, Feliu; Díaz Requejo, María Mar; Pérez Romero, Pedro José (Wiley, 2017)
A novel transformation is reported for the reaction of terminal or internal alkynes with the nitrene precursor PhI=NTs (Ts=p-toluenesulfonyl) in the presence of catalytic amounts of Tp(Br3)Cu(NCMe) (Tp(Br3)=hydrotris(3,4 ... -
Copper‐Catalyzed Selective Pyrrole Functionalization by Carbene Transfer Reaction
Rodríguez, Anabel M.; Molina, Francisco; Díaz Requejo, María Mar; Pérez Romero, Pedro José (Wiley, 2020-02)
1H‐Pyrroles can be directly functionalized by means of the incorporation of carbene groups from diazo compounds, in a process catalyzed by TpxCu complexes (Tpx=hydrotrispyrazolylborate ligand). The reactions take place ... -
Direct, Copper-Catalyzed Oxidation of Aromatic C-H Bonds with Hydrogen Peroxide under Acid-Free Conditions
Conde Alcántara, Ana Isabel; Díaz Requejo, María Mar; Pérez Romero, Pedro José (Royal Society of Chemistry, 2011-06)
The direct oxidation of benzene into phenol using hydrogen peroxide has been achieved in the absence of any acid with TpxCu(NCMe) complexes as the catalysts. In the case of anthracenes as the substrates, valuable ... -
Evidencing an inner-sphere mechanism for NHC-Au(I)- catalyzed carbene-transfer reactions from ethyl diazoacetate
Romero Fructos-Vázquez, Manuel; Urbano Baena, Juan; Díaz Requejo, María Mar; Pérez Romero, Pedro José (Beilstein-Institut, 2015)
Kinetic experiments based on the measurement of nitrogen evolution in the reaction of ethyl diazoacetate (N2CHCO2Et, EDA) and styrene or methanol catalyzed by the [IPrAu]+ core (IPr = 1,3-bis(diisopropylphenyl)imidazole ... -
Exclusive Aromatic vs Aliphatic C-H Bond Functionalization by Carbene Insertion with Gold-based Catalysts
Rivilla de la Cruz, Iván; Gómez Emeterio, Bella Pilar; Romero Fructos-Vázquez, Manuel; Díaz Requejo, María Mar; Pérez Romero, Pedro José (American Chemical Society, 2011)
The direct functionalization of aromatic C-H bonds by carbene insertion from diazocompounds catalyzed by gold complexes with N-heterocyclic ligands is described. The reaction is completely selective toward the Csp2-H bonds, ... -
A fully recyclable heterogenized Cu catalyst for the general carbene transfer reaction in batch and flow
Maestre Cera, Lourdes; Ozkal, Erhan; Ayats, Carles; Beltrán Martín, Álvaro; Díaz Requejo, María Mar; Pérez Romero, Pedro José; Pericàs, Miquel A. (Royal Society of Chemistry, 2015)
A polystyrene-linked tris(triazolyl)methanecopper(I) cationic catalyst operates under heterogeneous conditions for the reaction of ethyl diazoacetate (EDA) with an array of substrates. Carbon–hydrogen as well as X–H (X ... -
Funcionalización catalítica de alcanos, olefinas y poliolefinas saturadas e insaturadas mediante reacciones de transferencia de nitrenos y carbenos
Beltrán Martín, Álvaro (Universidad de Huelva, 2013)
Esta tesis doctoral consta de tres capítulos. El primero de ellos está dedicado a la funcionalización catalítica de poliolefinas insaturadas mediante la adición controlada de fragmentos carbeno desde diazoacetato de etilo, ... -
Functional-Group-Tolerant, Silver-Catalyzed N–N Bond Formation by Nitrene Transfer to Amines
Maestre Cera, Lourdes; Dorel, Ruth; Pablo, Óscar; Escofet, Imma; Sameera, W. M. C.; Álvarez, Eleuterio; Maseras, Feliu; Díaz Requejo, María Mar; Echavarren, Antonio M.; Pérez Romero, Pedro José (American Chemical Society, 2017)
Silver(I) promotes the highly chemoselective N-amidation of tertiary amines under catalytic conditions to form aminimides by nitrene transfer from PhI=NTs. Remarkably, this transformation proceeds in a selective manner ... -
Gold and diazo reagents: a fruitful tool for developing molecular complexity
Romero Fructos-Vázquez, Manuel; Díaz Requejo, María Mar; Pérez Romero, Pedro José (Royal Society of Chemistry, 2016)
Since the discovery in 2005 of the potential of soluble Au complexes to catalyse the transfer of carbene groups from diazo compounds to organic substrates, an increasing number of transformations have been reported. In ... -
Gold-catalyzed naphthalene functionalization
Pérez Romero, Pedro José; Díaz Requejo, María Mar; Rivilla de la Cruz, Iván (Beilstein-Institut, 2011)
The complexes IPrMCl (IPr = 1,3-bis(diisopropylphenyl)imidazol-2-ylidene, M = Cu, 1a; M = Au, 1b) in the presence of one equiv of NaBAr’4 (Ar’ = tetrakis(3,5-bis(trifluoromethyl)phenyl)borate) catalyze the transfer of ... -
Heterogeneous Olefin Aziridination Reactions Catalyzed by Polymer-Bound Tris(triazolyl)methane Copper Complexes
Ramírez Rodríguez, Manuel; Molina, Francisco; Etayo, Pablo; Pericàs, Miquel A.; Pérez Romero, Pedro José; Díaz Requejo, María Mar (Wiley, 2021)
Efficient olefin aziridination has been achieved with a tris(triazolyl)methane copper catalyst supported onto polystyrene. Aryl, alkyl and methoxycarbonyl-substituted olefins are converted into N-tosylaziridines in good ... -
Intermolecular Allene Functionalization by Silver-Nitrene Catalysis
Rodríguez, Manuel R.; Besora, María; Molina, Francisco; Maseras, Feliu; Díaz Requejo, María Mar; Pérez Romero, Pedro José (American Chemical Society, 2020-06)
Under silver catalysis conditions, using [Tp*,BrAg]2 as the catalyst precursor, allenes react with PhI═NTs in the first example of efficient metal-mediated intermolecular nitrene transfer to such substrates. The nature of ... -
Introducing the Catalytic Amination of Silanes via Nitrene Insertion
Rodríguez, Anabel. M; Pérez Ruíz, Jorge; Molina, Francisco; Poveda, Ana; Pérez Soto, Raúl; Maseras, Feliu; Díaz Requejo, María Mar; Pérez Romero, Pedro José (American Chemical Society, 2022-06-01)
The direct functionalization of Si−H bonds by the nitrene insertion methodology is described. A copper(I) complex bearing a trispyrazolylborate ligand catalyzes the transfer of a nitrene group from PhINTs to the Si−H bond ... -
Iron and Manganese Catalysts for the Selective Functionalization of Arene C(sp(2))-H Bonds by Carbene Insertion
Conde Alcántara, Ana Isabel; Sabenya, Gerard; Rodríguez, Mònica; Postils, Verònica; Luis, Josep M.; Díaz Requejo, María Mar; Costas, Miquel; Pérez Romero, Pedro José (Wiley, 2016)
The first examples of the direct functionalization of non-activated aryl sp(2) C-H bonds with ethyl diazoacetate (N2CHCO2Et) catalyzed by Mn- or Fe-based complexes in a completely selective manner are reported, with no ... -
Mechanism of Side Reactions in Alkane C-H Bond Functionalization by Diazo Compounds Catalyzed by Ag and Cu Homoscorpionate Complexes—A DFT Study
Braga, Ataualpa A. C.; Caballero Bevia, Ana; Urbano Baena, Juan; Díaz Requejo, María Mar; Pérez Romero, Pedro José; Maseras, Feliu (Wiley-VCH Verlag, 2011)
DFT computational methods were applied to the mechanistic study of the formation of fumarate and maleate derivatives in a solution containing alkane, TpBr3M [M=Cu, Ag; TpBr3=hydrotris(3,4,5-tribromopyrazolyl)borate] and ... -
Mechanism of the Selective Fe-Catalyzed Arene Carbon-Hydrogen Bond Functionalization
Postils, Verònica; Rodríguez, Mònica; Sabenya, Gerard; Conde Alcántara, Ana Isabel; Díaz Requejo, María Mar; Pérez Romero, Pedro José; Costas, Miquel; Solà, Miquel; Luis, Josep M. (American Chemical Society, 2018)
The complete chemoselective functionalization of aromatic C(sp(2))-H bonds of benzene and alkyl benzenes by carbene insertion from ethyl diazoacetate was unknown until the recent discovery of an iron-based catalytic system ... -
Mechanistic Studies on Gold-Catalyzed Direct Arene C–H Bond Functionalization by Carbene Insertion: The Coinage-Metal Effect
Romero Fructos-Vázquez, Manuel; Besora, María; Braga, Ataualpa A. C.; Díaz Requejo, María Mar; Maseras, Feliu; Pérez Romero, Pedro José (American Chemical Society, 2017)
The catalytic functionalization of the Csp 2-H bond of benzene by means of the insertion of the CHCO2Et group from ethyl diazoacetate (N2=CHCO2Et) has been studied with the series of coinage metal complexes IPrMCl (IPr ... -
Metal-Catalyzed Postpolymerization Strategies for Polar Group Incorporation into Polyolefins Containing C–C, C═C, and Aromatic Rings
Menendez Rodriguez, Gabril; Díaz Requejo, María Mar; Pérez Romero, Pedro José (American Chemical Society, 2021-05-19)
Polymeric materials bearing polar groups constitute a class of macromolecules with interest in a number of uses. Because the direct synthesis employing polymerization strategies from polar monomers is very often precluded ...
