Results 81 to 90 of about 27,691 (270)

Enhanced Selectivity in 4-Quinolone Formation: A Dual-Base System for Palladium-Catalyzed Carbonylative Cyclization with Fe(CO)₅

Molecules
The use of gaseous CO in Pd-catalyzed carbonylative quinolone synthesis presents challenges related to safety and precise pressure control. In response, a streamlined non-gaseous synthesis of 4-quinolone compounds has been developed.
Meng Guo, Dou Wu, Hongyu Yang, Xiao Zhang, Dong-Xu Xue, Weiqiang Zhang   +5 more
doaj   +1 more source

AminoxyTMT: A novel multi-functional reagent for characterization of protein carbonylation

BioTechniques, 2016
Protein carbonylation is a common oxidative stress (OS)—driven post-translational modification (PTM). Proteome-wide carbonylation events can best be characterized using a combination of analytical approaches.
Somaieh Afiuni-Zadeh, John C. Rogers, Sergei I. Snovida, Ryan D. Bomgarden, Timothy J. Griffin   +4 more
doaj   +1 more source

Carbonylation of Alkyl Radicals Derived from Organosilicates through Visible-Light Photoredox Catalysis.

Angewandte Chemie, 2019
Primary, secondary, and tertiary alkyl radicals formed by the photocatalyzed oxidation of organosilicates underwent efficient carbonylation with carbon monoxide (CO) to give a variety of unsymmetrical ketones.
Alex Cartier, Etienne Levernier, V. Corcé, T. Fukuyama, Anne-Lise Dhimane, C. Ollivier, I. Ryu, L. Fensterbank   +7 more
semanticscholar   +1 more source

Dimethyl‐, Diethyl‐, and Propylene Carbonates: An Emerging Class of Green Solvents for Organic Synthesis

The Chemical Record, EarlyView.
This review highlights recent advances in the use of organic carbonates, dimethyl carbonate (DMC), diethyl carbonate (DEC), and propylene carbonate (PC), as solvents in organic synthesis. Based on over seventy studies from the past 6 years, it shows their application in different organic reaction types, emphasizing their role in safer and more ...
Gabriela T. Quadros, Livia C. L. Valente, Thiago Barcellos, Daniela Hartwig, Laura Abenante, Eder J. Lenardão   +5 more
wiley   +1 more source

Oxidative Stress in Aging Human Skin

Biomolecules, 2015
Oxidative stress in skin plays a major role in the aging process. This is true for intrinsic aging and even more for extrinsic aging. Although the results are quite different in dermis and epidermis, extrinsic aging is driven to a large extent by ...
Mark Rinnerthaler, Johannes Bischof, Maria Karolin Streubel, Andrea Trost, Klaus Richter   +4 more
doaj   +1 more source

Organic and Inorganic Pollutants, Oxidative Stress Biomarkers, and Electrophoretic Protein Profiles in an Endangered Thresher Shark (Alopias vulpinus) From Southeastern Brazil: A Case Study

Environmental Toxicology, EarlyView.
ABSTRACT A comprehensive screening of different environmental contaminants (total metals, thermostable metal fractions associated with detoxification, and persistent organic pollutants) was conducted in an endangered common thresher shark (Alopias vulpinus ) individual incidentally captured in southeastern Brazil.
Sidney Fernandes Sales Junior, Amanda Pontes Lopes, Heloíse Martins de Souza, Regina Fonseca, Enrico Mendes Saggioro, Francielli Monteiro Casanova, Kamila Cezar Gramlich, Tatiana Dillenburg Saint'Pierre, Carlos German Massone, Renato Carreira, Rachel Ann Hauser‐Davis   +10 more
wiley   +1 more source

Assessment of Oxidative Stress, Vitellogenin, and Human Health Risks Derived From Nile Tilapia Exposed to Metals and Metalloids in Southeastern Brazil

Environmental Toxicology, EarlyView.
ABSTRACT Urban coastal lagoons are highly vulnerable ecosystems increasingly affected by metal contamination, as well as multiple anthropogenic stressors. This study evaluated ecotoxicological and human health risks associated with chronic metal exposure in Nile tilapia (Oreochromis niloticus) from an anthropogenically impacted lagoon in southeastern ...
Julia Araújo Alves, Priscila M. O. Muniz Cunha, Shênia Patrícia Corrêa Novo, Lorena Oliveira Souza Soares, Tatiana Dillenburg Saint‐Pierre, Fábio Veríssimo Correia, André Luís de Sá Salomão, Rachel Ann Hauser‐Davis, Enrico Mendes Saggioro   +8 more
wiley   +1 more source

Photo‐Promoted Nitrogen‐Centered Radical Mediated Intermolecular Aminative Carbonylation of Tertiary Allyl Alcohols to Access β‐Amino Ketones through (Hetero)Aryl Migration

ChemistryEurope
Carbon monoxide, as a crucial C1 synthon, has been widely used in the difunctionalization of alkenes. Additionally, nitrogen‐centered radicals (NCRs) are also effective intermediates for constructing C−N bonds.
Ming Hou, Yuanrui Wang, Hefei Yang, Jiajun Zhang, Prof. Dr. Xiao‐Feng Wu   +4 more
doaj   +1 more source

Synthesis of 11C-Labelled Ureas by Palladium(II)-Mediated Oxidative Carbonylation

Molecules, 2017
Positron emission tomography is an imaging technique with applications in clinical settings as well as in basic research for the study of biological processes.
Sara Roslin, Peter Brandt, Patrik Nordeman, Mats Larhed, Luke R. Odell, Jonas Eriksson   +5 more
doaj   +1 more source

Bio‐Based Amino Acid Curing Additives: Mechanistic and Kinetic Effects in Epoxidized Soybean Oil Epoxy Thermosets

Journal of Vinyl and Additive Technology, EarlyView.
The curing process of epoxidized soybean oil (ESO) is feasible through the incorporation of amino acids, generating materials with greater thermal stability and improved environmental friendliness. ABSTRACT In this study, the curing and thermal degradation kinetics of epoxidized soybean oil (ESO) were investigated using L‐aspartic acid (AA) and DL ...
Nicole P. Soares, José V. M. Barreto, Amanda M. Araújo, Carlos B. B. Luna, Edcleide M. Araújo, Julio S. Reboucas, Renate M. R. Wellen   +6 more
wiley   +1 more source