Results 101 to 110 of about 151,662 (178)

Synthetic Implications of Spin States in the Reactivity of Ni Intermediate Complexes in Coupling Reactions

European Journal of Organic Chemistry, Volume 29, Issue 16, 25 April 2026.
The formation of triplet Ni(II) complexes by activation of bromoalkenes with alkyl‐ or boryl Ni(I) is key to control the outcome of the reductive cross‐coupling of bromoalkanes precluding the formation of alkylboronates. We present a mechanistic study on the Ni‐catalyzed cross‐coupling reaction of bromoalkanes with diboron compounds as reductants.
Diego J. Cárdenas
wiley   +1 more source

Estudio químico del phthirus pyrifolia "suelda con suelda"

Revista de Química, 1990
Se realizaron estudios químicos de los extractos con éter de petróleo ( 40-600C), clorofonno y etanol de Phthirus pyrifolia (HBK) Eichl, una especie semiparásita de la familia Lorantaceae.
Betty Chung Tong, Olga Lock de Ugaz
doaj  

Silyl Rearrangements in Gold‐Catalyzed Transformations

European Journal of Organic Chemistry, Volume 29, Issue 15, 22 April 2026.
The synergy between the exceptional ability of gold catalysts to activate unsaturated substrates and the inherent tendency of organosilicon reagents to undergo silyl‐group rearrangements has unlocked a range of novel transformations, enabling access to otherwise challenging molecular architectures.
Patricia García‐Martínez, Luis A. López   +1 more
wiley   +1 more source

Aromaticity‐Induced Spin State Switching and High‐Spin States in Non‐Alternant Polyradicals

Journal of Computational Chemistry, Volume 47, Issue 10, 15 April 2026.
The peculiar topology of some non‐alternant systems allows such a degree of freedom in favored spin‐alignment between unpaired electrons that the polyradical can be in low‐, intermediate‐, and high‐spin ground state. Thus, the modulation of resonance energy upon distortions of pro‐aromatic units via external stimuli may result in switching the lowest ...
Sergi Betkhoshvili, Ibério de P. R. Moreira, Jordi Poater, Josep Maria Bofill   +3 more
wiley   +1 more source

Synthesis of 2,2-diphenyl-1,3,2-oxazaborolidin-5-one promoted by montmorillonite and microwaves: A green approach methodology

Results in Chemistry
Studies have shown that the heterocyclic molecules of the 2,2-diphenyl-1,3,2-oxazaborolidin-5-one (DPOXA) type have wide and varied biological activity with herbicidal, insecticidal, fungicidal, antibacterial, and apoptotic properties.
Rodrigo González-Castañeda, Omar Negrellos Correa, Raquel Gómez-Pliego, Alan Álvarez-Sánchez, Anuar Gómez-Tagle, Benjamín Velasco-Bejarano   +5 more
doaj   +1 more source

Synthesis of Polyhydroxylated Pyrrolidinyl Analogs of Sugar Nucleotides. Experimental and Computational Studies on Their Interactions With GalNAC‐T's

ChemBioChem, Volume 27, Issue 7, 14 April 2026.
A multidisciplinary approach based on organic synthesis supported by quantum mechanical calculations, efficient phosphorylation methods, affinity studies using conventional techniques and saturation transfer difference nuclear magnetic resonance, together with molecular dynamics simulations, has enabled the preparation of nucleotide analogs with ...
Pedro Merino, Veronica Juste, Alejandro Montesa, Sandra Pereira, Sara Orta, Manuel Pedrón, Ana I. Jiménez, Sonsoles Martín‐Santamaría, Ramón Hurtado‐Guerrero, Ignacio Delso, Tomás Tejero   +10 more
wiley   +1 more source

Concurrent and orthogonal gold(I) and ruthenium(II) catalysis inside living cells

Nature Communications, 2018
Transition-metal catalysis in living cells poses numerous challenges in terms of biocompatibility, and complex stability and reactivity. Here, the authors report a bioorthogonal gold-catalyzed C-C coupling reaction, occurring in living mammalian cells ...
Cristian Vidal, María Tomás-Gamasa, Paolo Destito, Fernando López, José L. Mascareñas   +4 more
doaj   +1 more source

Virtual Campus and Facebook in the university. Enemies or Allies in the teaching and learning processes? [PDF]

, 2013
Hoy en día nuestros alumnos viven una nueva era comunicativa. Desde hace varios años los químicos utilizan la tecnología para la enseñanza y el aprendizaje en los distintos niveles de educación.
Mansilla, Daniela Soledad, Muscia, Gisela Celeste, Ugliarolo, Esteban Ariel   +2 more
core   +1 more source

SÍNTESIS DE MESO-TETRAFENILPORFIRINA Y SU COMPLEJACIÓN CON METALES USANDO QUÍMICA VERDE

Avances en Ciencias e Ingeniería, 2019
En este trabajo se describe la preparación del ligando meso-tetrafenilporfirina y de tres de sus complejos metálicos, preparados por reacción con sales de Ni(II), Cu(II) y Zn(II), mediante procedimientos sintéticos enmarcados en la llamada “Química Verde”
Sandra Rodríguez-Álvarez, José M. Palazón, Rosa L. Dorta   +2 more
doaj  

Érase una vez un pizarrón: anécdotas, historias e ideas que surgieron durante las clases de Química Orgánica

Educación Química
Este manuscrito contiene algunas anécdotas, historias e ideas que han surgido de las clases que ha dado el Prof. José Manuel Méndez Stivalet y refleja su calidad como un docente de la vieja escuela que utiliza un pizarrón para dar sus clases. Se propone
José Manuel Méndez Stivalet, Héctor García-Ortega   +1 more
doaj   +1 more source