Results 21 to 30 of about 22,388 (172)

Light and Dark Cycles Control the Structural Evolution of Photoresponsive Supramolecular Systems

open access: yesAngewandte Chemie, EarlyView.
Here, we report a photoswitchable synthetic peptide that, under light energy cycles, exhibits supramolecular polymorphism coupled to darkness‐driven structural self‐selection. We demonstrate that light sustains a transient assembled state in the form of helical nanoribbons, hindering the system from undergoing a transition to the disassembled state ...
Alejandro Méndez‐Ardoy   +6 more
wiley   +2 more sources

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

open access: yesBeilstein 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   +4 more
doaj   +1 more source

Química orgánica e química macromolecular [PDF]

open access: yes, 2014
Titulación: Grao en Física -- Materia: QuímicaA materia Química do Grao en Física forma parte con Bioloxía e Informática para científicos do módulo de Formación básica de contido transversal e, á par destas, ten unha duración de 6 créditos ECTS ...
Lazzari, Massimo, Nieto Suárez, Marina
core   +1 more source

π‐Extended COUPY Fluorophores for Targeted Near‐Infrared Fluorescence and Lifetime Imaging in Live Cells

open access: yesAngewandte Chemie, EarlyView.
π‐Extended COUPY dyes, obtained by vinylogation of coumarin‐based COUPY scaffolds, shift absorption, and emission deep into the NIR region while preserving compactness and synthetic accessibility. These bright, photostable dyes enable live‐cell imaging, FLIM, and site‐specific peptide conjugation, offering a modular platform for targeted bioimaging and
Diego Abad‐Montero   +11 more
wiley   +2 more sources

QUÍMICA ORGÁNICA AROMÁTICA - FACULTAD DE QUÍMICA [PDF]

open access: yes, 2003
PROGRAMA DE UNIDAD DE APRENDIZAJE DE QUÍMICA ORGÁNICA AROMÁTICA - FACULTAD DE ...
QUÍMICA
core   +2 more sources

Tandem cross enyne metathesis (CEYM)–intramolecular Diels–Alder reaction (IMDAR). An easy entry to linear bicyclic scaffolds

open access: yesBeilstein Journal of Organic Chemistry, 2015
A new tandem cross enyne metathesis (CEYM)–intramolecular Diels–Alder reaction (IMDAR) has been carried out. It involves conjugated ketones, esters or amides bearing a remote olefin and aromatic alkynes as the starting materials.
Javier Miró   +5 more
doaj   +1 more source

Estrategias eficientes para la síntesis de glicomiméticos con potencial actividad biológica [PDF]

open access: yes, 2021
Los glicomiméticos son análogos estructurales de carbohidratos naturales. Estos compuestos han demostrado tener una mejor estabilidad metabólica y una mayor selectividad por la proteína blanco que los carbohidratos.

core  

Uso de modelado molecular como herramienta didáctica en el primer curso de grado de Química Orgánica

open access: yesEducación Química, 2018
El primer curso de Química Orgánica (Química Orgánica 101) de la Facultad de Química, Universidad de la República (Montevideo, Uruguay) se dicta para las carreras de Química Farmacéutica, Ingeniería Química, Química, Bioquímica Clínica e Ingeniería en ...
Gustavo Seoane   +9 more
doaj   +1 more source

Aproximación a la síntesis estereoselectiva de iminoazúcares miméticos de L-pentosas [PDF]

open access: yes, 2021
Los iminoazúcares son alcaloides presentes naturalmente en plantas y microorganismos. Estas moléculas polihidroxiladas han sido estudiadas por su carácter de glicomiméticos desde hace más de 60 años.

core  

Stepwise On‐Surface Synthesis and Transformations of Two‐Dimensional Covalent Organic Frameworks by Controlled Thermal Stimuli

open access: yesAdvanced Materials, EarlyView.
The seminal transformation of a 2D‐COF (SURFCOF‐IMDEA1) into a 2D porous COF (SURFCOF‐IMDEA2) on Au(111) by a sequential C‐C coupling and ladderization triggered by thermal annealing steps at increasing temperatures is reported. Abstract The development of covalent organic frameworks (COFs) is currently a primary objective in materials science, taking ...
Ana Barragán   +11 more
wiley   +1 more source

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