Search Results - "Cossío, Fernando P"

Phenanthrene-Extended Phenazine Dication: An Electrochromic Conformational Switch Presenting Dual Reactivity by Dosso, Jacopo, Bartolomei, Beatrice, Demitri, Nicola, Cossío, Fernando P, Prato, Maurizio

“…The synthesis and isolation of one of the few examples of a π-extended diamagnetic phenazine dication have been achieved by oxidizing a phenanthrene-based…”
Get full text

Enantioselective Ring-Opening Polymerization of rac-Lactide Dictated by Densely Substituted Amino Acids by Sanchez-Sanchez, Ana, Rivilla, Ivan, Agirre, Maddalen, Basterretxea, Andere, Etxeberria, Agustin, Veloso, Antonio, Sardon, Haritz, Mecerreyes, David, Cossío, Fernando P

“…Organocatalysis is becoming an important tool in polymer science because of its versatility and specificity. To date a limited number of organic catalysts have…”
Get full text

Stepwise Mechanism for the Bromination of Arenes by a Hypervalent Iodine Reagent by Granados, Albert, Shafir, Alexandr, Arrieta, Ana, Cossío, Fernando P, Vallribera, Adelina

“…A mild, metal-free bromination method of arenes has been developed using the combination of bis­(trifluoroacetoxy)­iodobencene and trimethylsilyl bromide. In…”
Get full text

Dyotropic Reactions: Mechanisms and Synthetic Applications by Fernández, Israel, Cossío, Fernando P, Sierra, Miguel A

“…The mechanisms and synthetic applications of dyotropic reactions are examined. Useful tools for organometallic chemistry have been discovered through the study…”
Get full text

The Mechanism of the Ketene−Imine (Staudinger) Reaction in Its Centennial: Still an Unsolved Problem? by Cossío, Fernando P, Arrieta, Ana, Sierra, Miguel A

“…Although Staudinger reported the reaction between ketenes and imines 100 years ago (1907), this process is still the most general and useful method for the…”
Get full text

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…”
Get full text

Enantiodivergent Synthesis of Bis-Spiropyrrolidines via Sequential Interrupted and Completed (3 + 2) Cycloadditions by Conde, Egoitz, Rivilla, Iván, Larumbe, Amaia, Cossío, Fernando P.

“…Both (5R)- and (5S)-1,7-diazaspiro­[4.4]­nonan-6-ones are obtained via a sequence of interrupted and completed stepwise (3 + 2) cycloadditions between…”
Get full text

Stereoselectivity, Different Oxidation States, and Multiple Spin States in the Cyclopropanation of Olefins Catalyzed by Fe–Porphyrin Complexes by Torrent-Sucarrat, Miquel, Arrastia, Iosune, Arrieta, Ana, Cossío, Fernando P

“…The mechanism of the cyclopropanation of alkenes with diazocompounds catalyzed by ClFeIII–porphyrin, [ClFeII–porphyrin]−, and FeII–porphyrin has been…”
Get full text

Stereoselective Coupling of N-tert-Butanesulfinyl Aldimines and β‑Keto Acids: Access to β‑Amino Ketones by Lahosa, Alejandro, Soler, Tatiana, Arrieta, Ana, Cossío, Fernando P, Foubelo, Francisco, Yus, Miguel

“…The reaction of chiral N-tert-butanesulfinyl aldimines with β-keto acids under basic conditions at room temperature proceeds with high levels of…”
Get full text

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…”
Get full text

Discovering Biomolecules with Huisgenase Activity: Designed Repeat Proteins as Biocatalysts for (3 + 2) Cycloadditions by Rivilla, Iván, Odriozola-Gimeno, Mikel, Aires, Antonio, Gimeno, Ana, Jiménez-Barbero, Jesús, Torrent-Sucarrat, Miquel, Cortajarena, Aitziber L, Cossío, Fernando P

“…Designed repeat proteins catalyze the 1,3-dipolar reaction between an imine and a π-deficient dipolarophile in THF solution to form unnatural nitroproline…”
Get full text

Chirality-Induced Electron Spin Polarization and Enantiospecific Response in Solid-State Cross-Polarization Nuclear Magnetic Resonance by Santos, Jose I., Rivilla, Iván, Cossío, Fernando P., Matxain, Jon M., Grzelczak, Marek, Mazinani, Shobeir K. S., Ugalde, Jesus M., Mujica, Vladimiro

“…NMR-based techniques are supposed to be incapable of distinguishing pure crystalline chemical enantiomers. However, through systematic studies of…”
Get full text

Aromaticity and Activation Strain Analysis of [3 + 2] Cycloaddition Reactions between Group 14 Heteroallenes and Triple Bonds by Fernández, Israel, Cossío, Fernando P, Bickelhaupt, F. Matthias

“…We have computationally explored the trend in reactivity of [3 + 2] cycloaddition reactions between H2ECPH and HCCH as the terminal position in the…”
Get full text

Regioselective Preparation of Benzo[b]furans from Phenols and α-Bromoketones by Arias, Leire, Vara, Yosu, Cossío, Fernando P

“…In this paper, a fully regiocontrolled synthesis of either 2- and 3-substituted benzo­[b]­furans is described. Direct reaction between phenols and…”
Get full text

Density Functional Theory Study on the Demethylation Reaction between Methylamine, Dimethylamine, Trimethylamine, and Tamoxifen Catalyzed by a Fe(IV)–Oxo Porphyrin Complex by Alberro, Nerea, Torrent-Sucarrat, Miquel, Arrieta, Ana, Rubiales, Gloria, Cossío, Fernando P

“…In this work, we studied computationally the N-demethylation reaction of methylamine, dimethylamine, and trimethylamine as archetypal examples of primary,…”
Get full text

Enantioselective Synthesis of Polysubstituted Spiro-nitroprolinates Mediated by a (R,R)‑Me-DuPhos·AgF-Catalyzed 1,3-Dipolar Cycloaddition by Cayuelas, Alberto, Ortiz, Ricardo, Nájera, Carmen, Sansano, José M, Larrañaga, Olatz, de Cózar, Abel, Cossío, Fernando P

“…The synthesis of constrained spirocycles is achieved effectively by means of 1,3-dipolar cyclodditions employing α-imino γ-lactones as azomethine ylide…”
Get full text

Fluorescent bicolour sensor for low-background neutrinoless double β decay experiments by Rivilla, Iván, Aparicio, Borja, Bueno, Juan M., Casanova, David, Tonnelé, Claire, Freixa, Zoraida, Herrero, Pablo, Rogero, Celia, Miranda, José I., Martínez-Ojeda, Rosa M., Monrabal, Francesc, Olave, Beñat, Schäfer, Thomas, Artal, Pablo, Nygren, David, Cossío, Fernando P., Gómez-Cadenas, Juan J.

“…Observation of the neutrinoless double β decay is the only practical way to establish that neutrinos are their own antiparticles 1 . Because of the small…”
Get full text

Synthesis and Structure of a Base-Stabilized C-Phosphino-Si-Amino Silyne by Gau, David, Kato, Tsuyoshi, Saffon-Merceron, Nathalie, De Cózar, Abel, Cossío, Fernando P, Baceiredo, Antoine

“…A silyne seeker: The synthesis of the first isolable silyne, which is stabilized by a phosphine ligand, has been achieved (see picture). An X‐ray diffraction…”
Get full text

Phosphoramidite–Cu(OTf)2 Complexes as Chiral Catalysts for 1,3-Dipolar Cycloaddition of Iminoesters and Nitroalkenes by Castelló, Luis M, Nájera, Carmen, Sansano, José M, Larrañaga, Olatz, Cózar, Abel de, Cossío, Fernando P

“…Chiral complexes formed by phosphoramidites such as (S a ,R,R)-9 and Cu(OTf)2 are excellent catalysts for the general 1,3-dipolar cycloaddition between…”
Get full text

Double Group Transfer Reactions: Role of Activation Strain and Aromaticity in Reaction Barriers by Fernández, Israel, Bickelhaupt, F. Matthias, Cossío, Fernando P.

“…Double group transfer (DGT) reactions, such as the bimolecular automerization of ethane plus ethene, are known to have high reaction barriers despite the fact…”
Get full text