Results 31 to 40 of about 1,354 (186)

Hexabromoacetona na preparação de amidas: síntese e reatividade de derivados de benzimidazol e quinoxalina [PDF]

, 2012
Tese (doutorado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas, Programa de Pós-Graduação em Química, Florianópolis, 2010.A busca por novas metodologias sintéticas, estudos de reatividade e obtenção de moléculas de ...
Menezes, Fabrício Gava
core  

Flavouring Group Evaluation 80, Revision 2 (FGE.80Rev2): Consideration of alicyclic, alicyclic‐fused and aromatic‐fused ring lactones evaluated by the JECFA (61st and 82nd meetings) structurally related to an aromatic lactone evaluated in FGE.27

EFSA Journal
The EFSA Panel on Food Additives and Flavourings was requested to evaluate 14 flavouring substances assigned to the Flavouring Group Evaluation 80 (FGE.80), using the Procedure as outlined in the Commission Regulation (EC) No 1565/2000.
EFSA Panel on Food Additives and Flavourings (FAF), Laurence Castle, Monica Andreassen, Gabriele Aquilina, Maria Bastos, Polly Boon, Biagio Fallico, Reginald Fitzgerald, Maria Jose Frutos Fernandez, Bettina Grasl‐Kraupp, Ursula Gundert‐Remy, Rainer Gürtler, Eric Houdeau, Marcin Kurek, Henriqueta Louro, Patricia Morales, Sabina Passamonti, Romualdo Benigni, Gisela Degen, Karl‐Heinz Engel, Paul Fowler, Karin Nørby, Camilla Svendsen, Maria Carfí, Borana Dino, Gabriele Gagliardi, Carla Martino, Wim Mennes   +27 more
doaj   +1 more source

The Arylation of α,β-Unsaturated Carbonyl Compounds by Arenediazonium Salts—A Synthetic Route to Precursors of Substituted 2-Mercaptothiazoles

Molecules
This paper presents the first examples of the use of arylation products of α,β-unsaturated carbonyl compounds under Meerwein reaction conditions for the synthesis of substituted 2-mercaptothiazoles.
M. Ostapiuk, O. Barabash, M. Obushak, Mykola Kravets, Andreas Schmidt, Yurii V Ostapiuk   +5 more
semanticscholar   +1 more source

Synthesis of Natural Products via sequential Olefin Cross Metathesis - Cyclisation

, 2006
Das Synthesepotential der Olefinkreuzmetathese (CM) konnte in den letzten Jahren durch die Entwicklung definierter Ruthenium-Katalysatoren mit einem N-heterocyclischen Carben- und chelatisierenden o-Isopropoxybenzylidenliganden, die sich durch eine ...
Gebauer, Julian
core   +1 more source

Regioelective Hydroformylation of an α,β‐Unsaturated Ester: Spectroscopic Studies on Catalytic Species and the Influence of Ligands on Regioselectivity

Annalen der Pharmacie
Hydroformylation of α,β‑unsaturated esters is an atom‐economical route towards aldehydes as precursors for pharmaceuticals. In this work, regioselective hydroformylation of an α,β‑unsaturated ester to the β‑aldehyde was initially re‐evaluated using a ...
Hannah Bork, Thorsten Rösler, M. Leutzsch, Niklas Wessel, A. Vorholt, H. Gröger   +5 more
semanticscholar   +1 more source

Synthesis of Aminocyclopropanes by Redox‐Neutral Aminoalkylation

Angewandte Chemie International Edition, EarlyView.
Aminocyclopropane synthesis by hydroaminoalkylation utilizing cheap, readily available starting materials is presented, offering orthogonality to commonly used methods and allowing broad functional‐group tolerance. Solvent‐mediated conditions enable the reaction of a pre‐formed hemiaminal with alkenes and alkynes.
Gwyndaf A. Oliver, Konstantin Günther, Chiara Sebastianelli‐Schoditsch, Sophie Woolford, Iina Ludwig, Harald H. Sitte, Nuno Maulide   +6 more
wiley   +1 more source

Engineering Halide Perovskites With Chalcogen‐Based Compounds: Insights Into Stability, Interfaces, and Device Integration

Carbon Energy, EarlyView.
Chalcogen‐based compounds are explored as versatile tools to enhance the stability and performance of halide perovskites. Their roles in defect passivation, ion migration suppression, and interface engineering are analyzed, along with impacts on device efficiency.
Atanu Jana, Deblina Das, Sourav Mal, Tarak Nath Mandal, Sangeun Cho   +4 more
wiley   +1 more source

Dual‐Function Electrocatalysis: Simultaneous Wastewater Remediation and Hydrogen Evolution—A Comprehensive Review

Carbon Energy, EarlyView.
Replacing the oxygen evolution reaction with the electro‐oxidation of pollutants and waste streams offers an energy‐efficient route for simultaneous hydrogen production and pollutant remediation. This review summarizes the reaction mechanisms, catalyst design principles, and emerging paired‐electrolysis strategies that govern activity, selectivity ...
Safa Al‐Yahyaey, Rashid Al‐Hajri, Ala'a H. Al‐Muhtaseb, Hussein A. Younus, Mohammed Al‐Abri   +4 more
wiley   +1 more source

A Selectfluor‐based Polonovski Rearrangement Leading to Novel Entities for Synthetic and Medicinal Applications

Chemistry – A European Journal, EarlyView.
Starting from carboxylic acids and Selectfluor‐derivatives, functionalized diazabicyclooctanes can be obtained via a novel Polonovski‐type rearrangement proceeding under mild reaction conditions. Besides their use in organic synthesis the unique structure and reactivity of the rearrangement products enables applications in medicinal chemistry ...
Jakob Kuhn, Susanne Gradl, Vanessa Osterloh, Peter Gmeiner, Harald Hübner, Markus R. Heinrich   +5 more
wiley   +1 more source

Hybrid Macrocyclic Peptides — Synthetic Strategies to Diversify and Cyclize Peptide Libraries in Phage Display Selections

Chemistry – A European Journal, EarlyView.
Hybrid macrocyclic peptides unite genetically encoded peptide libraries with the structural complexity of synthetic small molecules. This Review critically analyzes phage‐compatible cyclization and diversification chemistries, highlights emerging opportunities beyond traditional cysteine‐based approaches, and outlines how future advances may enable the
Titia Rixt Oppewal, Clemens Mayer
wiley   +1 more source