Search results for "Accio"
showing 10 items of 379 documents
Photocatalytic Giese Addition of 1,4-Dihydroquinoxalin-2-ones to Electron-Poor Alkenes Using Visible Light.
2020
The visible-light photoredox-catalyzed coupling of 1,4-dihydroquinoxalin-2-ones and Michael acceptors was achieved using Ru(bpy)3Cl2 as the photocatalyst and (PhO)2PO2H as an additive. The optimized reaction conditions provide a good yield for the radical conjugate addition products (44 examples) with a wide range of structurally different Michael acceptors. A gram scale reaction using sunlight irradiation is also described. Furthermore, several transformations were carried out with the Giese addition products.
Organocatalytic enantioselective Strecker reaction with seven-membered cyclic imines
2018
[EN] A highly enantioselective Strecker reaction with dibenzo[b,f][1,4]oxazepines has been described using a dihydroquinine-derived thiourea as organocatalyst. The reaction affords chiral 10,11-dihydrodibenzo[b,f][1,4] oxazepine 11-carbonitrile derivatives in excellent yields (up to 99%) and excellent enantioselectivities (up to 98%) under mild reaction conditions.
Regio- and Stereoselective Synthesis of 3-Pyrazolylidene-2-oxindole Compounds by Nucleophilic Vinylic Substitution of (E)-3-(Nitromethylene)indolin-2…
2019
[EN] A highly regio- and stereoselective synthesis of 3-alkylidene-2-oxindoles has been described through a nucleophilic vinylic substitution (SNV) of (E)-3-(nitromethylene)indolin-2-one using pyrazol-3-ones as nucleophiles and Et3N as a base. The reaction affords selectively the Z-isomer when pyrazol-3-ones without substituents at the 4 position are used. While the reaction is E-selective with 4- substituted pyrazolones. The stereoselectivity (up to >20:1) and the yields (up to 98%) are very high under mild reaction conditions.
Catalytic enantioselective aza-Reformatsky reaction with seven-membered cyclic imines dibenzo[b,f][1,4]oxazepines
2017
A catalytic enantioselective aza-Reformatsky reaction is reported with cyclic dibenzo[b,f][1,4]oxazepines and ethyl iodoacetate leading to the synthesis of chiral ethyl 2-(10,11-dihydrodibenzo[b,f][1,4]oxazepin-11-yl)acetate derivatives with excellent yields and high enantioselectivities (up to 98% yield and 97 : 3 er) using a readily available diaryl prolinol L4 as the chiral ligand and Me2Zn as the zinc source under an air atmosphere. Furthermore, different transformations were carried out with the corresponding chiral β-amino esters, preserving in all cases the optical purity.
Multi-criteria framework as an innovative tradeoff approach to determine the shelf-life of high pressure-treated poultry
2016
International audience; A multi-criteria framework combining safety, hygiene and sensorial quality was developed to investigate the possibility of extending the shelf-life and/or removing lactate by applying High Hydrostatic Pressure (HHP) in a ready-to-cook (RTC) poultry product. For this purpose, Salmonella and Listeria monocytogenes were considered as safety indicators and Escherichia coli as hygienic indicator. Predictive modeling was used to determine the influence of HHP and lactate concentration on microbial growth and survival of these indicators. To that end, probabilistic assessment exposure models developed in a previous study (Lerasle, M., Guillou, S., Simonin, H., Anthoine, V.,…
A Trans-Omics Comparison Reveals Common Gene Expression Strategies in Four Model Organisms and Exposes Similarities and Differences between Them.
2021
AbstractThe ultimate goal of gene regulation should focus on the protein level. However, as mRNA is an obligate intermediary, and because the amounts of mRNAs and proteins are controlled by their synthesis and degradation rates, the cellular amount of a given protein can be attained following different strategies. By studying omics datasets for six expression variables (mRNA and protein amounts, plus their synthesis and decay rates), we previously demonstrated the existence of common expression strategies (CES) for functionally-related genes in the yeastSaccharomyces cerevisiae. Here we extend that study to two other eukaryotes: the distantly related yeastSchizosaccharomyces pombeand cultur…
Exploring the Human-Nipah Virus Protein-Protein Interactome
2017
ABSTRACT Nipah virus is an emerging, highly pathogenic, zoonotic virus of the Paramyxoviridae family. Human transmission occurs by close contact with infected animals, the consumption of contaminated food, or, occasionally, via other infected individuals. Currently, we lack therapeutic or prophylactic treatments for Nipah virus. To develop these agents we must now improve our understanding of the host-virus interactions that underpin a productive infection. This aim led us to perform the present work, in which we identified 101 human-Nipah virus protein-protein interactions (PPIs), most of which (88) are novel. This data set provides a comprehensive view of the host complexes that are manip…
La experiencia del Mercado Alternativo Bursátil para Empresas en Expansión (MaB-EE) en España
2015
EXPERIENCIA DEL MERCADO ALTERNATIVO BURSÁTIL PARA EMPRESAS EN EXPANSIÓN (MaB-EE) EN ESPAÑA Mª Ángeles Soler Movilla Universitat de València El marco general de la Tesis lo constituye el segmento del mercado bursátil español especialmente diseñado para la negociación de acciones de empresas de reducida capitalización: el Mercado Alternativo Bursátil para Empresas en Expansión (MaB-EE), perteneciente a Bolsas y Mercados Españoles Sistemas de Negociación SA (BME). Este mercado nace en el año 2009 como un nuevo intento de ofrecer a las pequeñas y medianas empresas españolas la posibilidad de financiarse mediante recursos propios en un mercado bursátil organizado. La creación de este mercado se …
Presentación e ingreso de determinadas declaraciones y autoliquidaciones tributarias durante el Estado de Alarma
2020
[ES] Desde la declaración del estado de alarma como consecuencia de la crisis sanitaria provocada por el COVID-19, han sido aprobados numerosos reales decretos. Entre ellos, uno de los principales desde la perspectiva tributaria es el Real Decreto-ley 14/2020, en virtud del cual se ampliaba el plazo de presentación e ingreso de numerosos tributos, destacando, entre otros, el IVA y el IS. Además, las comunidades autónomas también han aprobado medidas relativas a la ampliación del plazo de presentación e ingreso de los tributos respecto de los que tienen atribuidas competencias.
Régimen disciplinario en la ley del mercado de valores
2017
[ES] Según la legislación vigente, tendrán la consideración de infracciones, por acción o por omisión, las conductas o comportamientos derivados del incumplimiento de de determinados requisitos, conductas o imposiciones tales como la de reserva de actividad y/o de la obligación de obtener autorizaciones exigidas, entre otras. Más concretamente, el régimen jurídico de las infracciones y sanciones viene recogido en el Título VIII del RD Lg. 4/2015, de 23 de octubre, que aprueba el TR la Ley del Mercado de Valores (en adelante LMV 15), bajo la rúbrica del Régimen de supervisión, inspección y sanción. El presente trabajo tiene como objeto el estudio del sistema que así se configura en materia d…