Results 61 to 70 of about 151,662 (178)

Chiral gold(I) vs chiral silver complexes as catalysts for the enantioselective synthesis of the second generation GSK-hepatitis C virus inhibitor

Beilstein Journal of Organic Chemistry, 2011
The synthesis of a GSK 2nd generation inhibitor of the hepatitis C virus, by enantioselective 1,3-dipolar cycloaddition between a leucine derived iminoester and tert-butyl acrylate, was studied.
María Martín-Rodríguez, Carmen Nájera, José M. Sansano, Abel de Cózar, Fernando P. Cossío   +4 more
doaj   +1 more source

Consideraciones del estudiante sobre su formación práctica en asignaturas del área de conocimiento de química orgánica [PDF]

, 2015
En la presente comunicación se detallarán los resultados obtenidos de la valoración del alumno sobre los créditos prácticos en diferentes asignaturas de grado (Grado en Biología, y Grado en Ciencias del Mar: 26510, Química; Grado en Química: 26030 ...
Alonso, Diego A., Baeza, Alejandro, Blasco, Inmaculada, González López, Susana, Guillena, Gabriela, Gómez Lucas, Cecilia, Martínez Flores, Regina, Pastor, Isidro M., Ramón, Diego J., Trillo Alarcón, María Paz   +9 more
core  

Synthesis and characterization of amphiphilic nitroxide 1,1,3,3–tetraethylisoindoline–2–oxyl–5–sodium sulfonate (TEIOSNa)

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract The synthesis and characterization of an amphiphilic nitroxide to be used as a controlling agent in a nitroxide‐mediated living radical polymerization in aqueous dispersion media is presented. In the first stage of nitroxide synthesis (phthalimide protection), two reaction methods were employed: traditional and microwave.
Enrique García‐Leal, Martha Eugenia Albores Velasco, René O. Vargas, Rubén Mil‐Martínez   +3 more
wiley   +1 more source

DNA Interactions and Biological Activity of 2,9-Disubstituted 1,10-Phenanthroline Thiosemicarbazone-Based Ligands and a 4-Phenylthiazole Derivative

Biology
Four 1,10-phenanthroline derivatives (1–4) were synthesized as potential telomeric DNA binders, three substituted in their chains with thiosemicarbazones (TSCs) and one 4-phenylthiazole derivative.
Álvaro Nicolás, Julia G. Quero, Marta Barroso, Zoila Gándara, Lourdes Gude   +4 more
doaj   +1 more source

The trypanocidal activity of the alkaloid oliverine involves inhibition of DNA synthesis [PDF]

, 2010
The Trypanosoma cruzi parasite is an etiologic agent of the American trypanosomiasis called Chagas disease. This pathology affects more than 24 million persons and represents one of the most important public health problems in Latin America.
Garro, Hugo Alejandro, Juri Ayub, Maximiliano, Lucero Estrada, Cecilia Stella Marys, Nieto, M., Pungitore, Carlos Rodolfo, Tonn, Carlos Eugenio   +5 more
core  

Poly(Ionic) Liquid‐Enhanced Ion Dynamics in Cellulose‐Derived Gel Polymer Electrolytes

ChemSusChem, Volume 18, Issue 6, March 15, 2025.
Advancing Energy Storage: Gel Polymer Electrolytes with Promising Potential Gel polymer electrolytes (GPEs) incorporating methyl cellulose and a range of ionic/polymeric achieved Li+ transference numbers comparable to traditional liquid electrolytes.
Tiago G. Paiva, Maykel Klem, Sara L. Silvestre, João Coelho, Neri Alves, Elvira Fortunato, Eurico J. Cabrita, Marta C. Corvo   +7 more
wiley   +1 more source

Mechanistic Paths for the Gold(I)‐Catalyzed Heteroannulation of Salicylic Amides With Apolar Alkynes Explored With Density Functional Theory Calculations

European Journal of Organic Chemistry, EarlyView.
A manifold of catalytic reaction paths can operate in the Au(I)‐catalyzed heteroannulation of salicylic amides and alkynes. However, a subtle initial nucleophilic advantage of N versus O and a kinetic bottleneck at an advanced stage of the mechanistic machinery seems to suffice for the reaction to run on a single path and with exquisite selectivity. We
Ioannis Stylianakis, Evaggelia Vlachou, Carlos Silva López, Antonios Kolocouris   +3 more
wiley   +1 more source

SÍNTESIS DE DERIVADOS DE XANTENO EN UN LÍQUIDO IÓNICO

Avances en Ciencias e Ingeniería, 2019
This paper describes a simple and efficient procedure for obtaining an ionic liquid, 1,3-dimethylimidazolium methylsulfate, and its application in the synthesis of various xanthene derivatives, by coupling reactions of benzaldehyde or substituted ...
María E. Choque-Zárate, Sandra Rodríguez-Álvarez, José M. Palazón, Rosa L. Dorta   +3 more
doaj  

Métodos alternativos ao uso de insecticidas [PDF]

, 2013
Titulación: Licenciatura en Química -- Materia: Química orgánica agrícolaEsta unidade didáctica inclúese na materia de Química Orgánica Agrícola que se imparte no quinto curso da licenciatura en Química e supón unha carga lectiva de 60 horas.
Seco Castro, José Manuel
core  

Direct synthesis of b -ketophosphonates and vinylphosphonates from alkenes or alkynes catalyzed by CuNPs/ZnO [PDF]

, 2015
Copper nanoparticles (CuNPs) supported on ZnO have been shown to e ff ectively catalyze the direct synthesis of b -ketophosphonates from alkenes or alkynes, and that of vinyl phosphonates from alkynes and diethylphosphite, under air and in the absence of ...
Alonso Francisco, Gutierrez, Victoria Soledad, Mascaró, Evangelina, Moglie, Yanina Fernanda, Radivoy, Gabriel Eduardo   +4 more
core   +1 more source