Search Results - "Barrera, Javier"

Brønsted Acid versus Phase‐Transfer Catalysis in the Enantioselective Transannular Aminohalogenation of Enesultams by Luis‐Barrera, Javier, Rodriguez, Sandra, Uria, Uxue, Reyes, Efraim, Prieto, Liher, Carrillo, Luisa, Pedrón, Manuel, Tejero, Tomás, Merino, Pedro, Vicario, Jose L.

“…We have studied the enantioselective transannular aminohalogenation reaction of unsaturated medium‐sized cyclic benzosulfonamides by using both chiral Brønsted…”
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Visible‐Light Photocatalytic Intramolecular Cyclopropane Ring Expansion by Luis‐Barrera, Javier, Laina‐Martín, Víctor, Rigotti, Thomas, Peccati, Francesca, Solans‐Monfort, Xavier, Sodupe, Mariona, Mas‐Ballesté, Rubén, Liras, Marta, Alemán, José

“…Described herein is a new visible‐light photocatalytic strategy for the synthesis of enantioenriched dihydrofurans and cyclopentenes by an intramolecular nitro…”
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Rate Coefficient and Mechanism of the OH-Initiated Degradation of 1‑Chlorobutane: Atmospheric Implications by Jara-Toro, Rafael A, Barrera, Javier A, Aranguren-Abrate, Juan P, Taccone, Raúl A, Pino, Gustavo A

“…In this work, we investigate the degradation process of 1-chlorobutane, initiated by OH radicals, under atmospheric conditions (air pressure of 750 Torr and…”
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Synthesis of 3-Benzazepines by Metal-Free Oxidative C-H Bond Functionalization-Ring Expansion Tandem Reaction by Gini, Andrea, Bamberger, Julia, Luis-Barrera, Javier, Zurro, Mercedes, Mas-Ballesté, Rubén, Alemán, José, Mancheño, Olga García

“…A metal‐free synthesis of biologically important benzazepines is achieved through a single synthetic operation involving an oxidative C–H bond…”
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Chemical ecology of Cyclocephala forsteri (Melolonthidae), a threat to macauba oil palm cultivars (Acrocomia aculeata, Arecaceae) by Maia, Artur Campos Dália, Reis, Letícia Koutchin, Navarro, Daniela Maria do Amaral Ferraz, Aristone, Flavio, Colombo, Carlos Augusto, Carreño‐Barrera, Javier, Núñez‐Avellaneda, Luis Alberto, Santos, Geanne Karla Novais

“…The environmental unsustainability of African oil palm crops is a growing worldwide concern, and the macauba palm in tropical Southern America surges as the…”
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Intercomparison Between Surrogate, Explicit, and Full Treatments of VSL Bromine Chemistry Within the CAM‐Chem Chemistry‐Climate Model by Fernandez, Rafael P., Barrera, Javier A., López‐Noreña, Ana Isabel, Kinnison, Douglas E., Nicely, Julie, Salawitch, Ross J., Wales, Pamela A., Toselli, Beatriz M., Tilmes, Simone, Lamarque, Jean‐François, Cuevas, Carlos A., Saiz‐Lopez, Alfonso

“…Many Chemistry‐Climate Models (CCMs) include a simplified treatment of brominated very short‐lived (VSLBr) species by assuming CH3Br as a surrogate for VSLBr…”
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Squaramide‐IRMOF‐16 Analogue for Catalysis of Solvent‐Free, Epoxide Ring‐Opening Tandem and Multicomponent Reactions by Vignatti, Claudia, Luis‐Barrera, Javier, Guillerm, Vincent, Imaz, Inhar, Mas‐Ballesté, Rubén, Alemán, José, Maspoch, Daniel

“…Tandem and multicomponent one‐pot reactions are highly attractive because they enable synthesis of target molecules in a single reaction vessel. However, they…”
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Rate coefficient and mechanism of the OH-initiated degradation of cyclobutanol: A combined experimental and theoretical study by Garavagno, María de los A., Hernández, Federico J., Jara-Toro, Rafael A., Mahecha, Genesys, Barrera, Javier A., Taccone, Raúl A., Pino, Gustavo A.

“…The degradation process of cyclobutanol (cButOH) by hydroxyl radical (OH), under atmospheric conditions, (750 ± 10) Torr of air and (296 ± 2) K, has been…”
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18F-FDG PET/CT in lung B lymphoid hyperplasia-type Castleman disease by Fernández-Rodríguez, Paula, Fernández López, Rosa, Acevedo Báñez, Irene, Mohigefer Barrera, Javier, Jiménez-Hoyuela García, José Manuel

“…We present a 62-year-old woman who, after a catarrhal episode, underwent a chest xray and a chest CT, identifying a pleural-based mass in the left lower lobe…”
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Resistance to fracture due to cyclic fatigue of stainless steel manual files and its association to surface roughness by Niño-Barrera, Javier L, Sánchez-Alemán, José A, Gamboa-Martinez, Luis, Cortes-Rodriguez, Carlos

“…The aim of this study was to evaluate the possible association between the roughness of 5 brands of stainless steel endodontic files and their resistance to…”
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Modeling the Sources and Chemistry of Polar Tropospheric Halogens (Cl, Br, and I) Using the CAM‐Chem Global Chemistry‐Climate Model by Fernandez, Rafael P., Carmona‐Balea, Antía, Cuevas, Carlos A., Barrera, Javier A., Kinnison, Douglas E., Lamarque, Jean‐Francois, Blaszczak‐Boxe, Christopher, Kim, Kitae, Choi, Wonyong, Hay, Timothy, Blechschmidt, Anne‐Marlene, Schönhardt, Anja, Burrows, John P., Saiz‐Lopez, Alfonso

“…Current chemistry climate models do not include polar emissions and chemistry of halogens. This work presents the first implementation of an interactive polar…”
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Synthesis of turbomicin-based alkaloids through infrared light-induced multicomponent reactions and assessment of their cytotoxic and antifungal bioactivity by Penieres-Carrillo, José-Guillermo, Ríos-Guerra, Hulme, Solano-Becerra, José-Dolores, Pérez-Flores, Francisco-Javier, Barrera-Téllez, Francisco-Javier, Luna-Mora, Ricardo-Alfredo

“…The cytotoxic and antifungal capacity of a set of turbomycin-based alkaloids, assembled by multicomponent reactions through exposure to near-infrared light ( λ…”
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Ectopic ACTH syndrome in a patient with Crohn's disease by Pérez Ramírez, Alberto, Moreno Loro, Antonio, Mohigefer Barrera, Javier, Herrera Justiniano, José Manuel

“…We present the case of a 62-year-old man with Crohn's disease who consulted for abdominal pain and lower limbs edema. The patient developed Cushing's syndrome…”
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Cover Picture: Stereodivergent Aminocatalytic Synthesis of Z- and E-Trisubstituted Double Bonds from Alkynals (Chem. Eur. J. 46/2016) by Marzo, Leyre, Luis-Barrera, Javier, Mas-Ballesté, Rubén, Ruano, José Luis García, Alemán, José

“…The Spanish tapas and wines are well known worldwide for their culinary qualities. Just as the choice and the temperature of the wine are crucial for the good…”
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Stereodivergent Aminocatalytic Synthesis of Z- and E-Trisubstituted Double Bonds from Alkynals by Marzo, Leyre, Luis-Barrera, Javier, Mas-Ballesté, Rubén, Ruano, José Luis García, Alemán, José

“…A highly diastereoselective synthesis of trisubstituted Z‐ or E‐enals, which are important intermediates in organic synthesis, as well as being present in…”
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Does the Geometric Location of Odontoblast Differentiation and Dentinal Tubules Depend on a Reaction-Diffusion System between BMP2 and Noggin? A Mathematical Model by Niño-Barrera, Javier L., DDS, Garzón-Alvarado, Diego A., MSc, PhD

“…Abstract Introduction The mesenchymal differentiation to odontoblasts is a complex process that determines the formation of dentinal tubules. This process…”
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Ancognatha vulgaris (Melolonthidae, Cyclocephalini): a specialized pollen-feeding scarab associated with wax palms (Ceroxylon spp., Arecaceae) in Andean cloud forests of Colombia by Carreño-Barrera, Javier, Núñez-Avellaneda, Luis Alberto, Maia, Artur Campos Dália

“…With 22 species, Ancognatha is the fourth most species-rich genus of Neotropical cyclocephaline scarabs (Melolonthidae, Cyclocephalini), an important group of…”
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Comparing the Effect of Anthropogenically Amplified Halogen Natural Emissions on Tropospheric Ozone Chemistry Between Pre‐Industrial and Present‐Day by Barrera, Javier A., Kinnison, Douglas E., Fernandez, Rafael P., Lamarque, Jean‐François, Cuevas, Carlos A., Tilmes, Simone, Saiz‐Lopez, Alfonso

“…Reactive halogens (X + XO, X = I, Br or Cl) catalytically destroy a fraction of tropospheric ozone under present‐day (PD) conditions, however, their…”
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Assessment of the relationship between the maxillary sinus floor and the upper posterior root tips: Clinical considerations by Nino‐Barrera, Javier Laureano, Ardila, Edith, Guaman‐Pacheco, Fernando, Gamboa‐Martinez, Luis, Alzate‐Mendoza, Diana

“…Aim The purpose of the present study was to evaluate the relationship between the maxillary sinus floor and the upper posterior root tips in the Colombian…”
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One-Pot Asymmetric Synthesis of Cyclopropanes with Quaternary Centers Starting From Bromonitroalkenes under Aminocatalytic Conditions by Luis-Barrera, Javier, Mas-Ballesté, Ruben, Alemán, José

“…Cyclopropanes with a quaternary center are efficiently synthesized starting from bromonitroalkenes and alkyl aldehydes under aminocatalysis, giving good yield,…”
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