Results 51 to 60 of about 19,687 (245)

Iridium-Catalyzed Formal [4 + 1] Cycloaddition of Biphenylenes with Alkenes Initiated by C-C Bond Cleavage for the Synthesis of 9,9-Disubstituted Fluorenes.

Organic Letters, 2016
An Ir-catalyzed intermolecular reaction of biphenylenes as a C4 unit with various alkenes as a C1 unit gave 9,9-disubstituted fluorenes in moderate to high yields.
Hideaki Takano, K. Kanyiva, T. Shibata
semanticscholar   +1 more source

Multiscale Design of Anion Exchange Membrane‐Based Seawater Electrolysis for Sustainable Hydrogen Production

Advanced Energy Materials, EarlyView.
Direct seawater electrolysis using anion exchange membranes is emerging as a promising route for sustainable hydrogen production. This review summarizes multiscale design strategies from seawater chemistry and OER–ClER selectivity to catalysts, membranes, MEAs, cells, stacks, and system integration, providing a roadmap toward selective, durable, and ...
Chiho Kim, Geunhee Yuk, Jong‐Hyeok Park, Shin‐woo Myeong, Jun Seok Ha, Won Tae Hong, Jung Kyu Kim, Sung Mook Choi   +7 more
wiley   +1 more source

Vieillissement du polyamide 11 utilisé dans les conduites flexibles : influence de la composition du fluide transporté Influence of the Chemical Nature of the Environment on the Aging of Polyamide 11 Used for Offshore Flexible Pipes

Oil & Gas Science and Technology, 2006
Le polyamide 11 est utilisé comme gaine d'étanchéité interne des conduites flexibles de transport de produits pétroliers. Dans certaines conditions d'utilisation, celui-ci subit une dégradation de ses propriétés mécaniques et physico-chimiques initiales.
Ubrich E., Fafet A., Robert E., Serpe G.
doaj   +1 more source

Synthese Unkonventioneller α‐Polyhalogenierter Amine Durch Hydroaminoalkylierung

Angewandte Chemie, EarlyView.
Es wird ein redox‐neutrales Verfahren beschrieben, bei dem Alkene und Alkine unter Verwendung stabiler Hemiaminal‐Reagenzien in α‐Polyhalogenmethylamine umgewandelt werden. Dieser Ansatz ermöglicht den Zugang zu α‐CF3‐, α‐CF2H‐, α‐CF2Cl‐, und α‐CFClH‐Aminen und besticht durch ein breites Substratspektrum, eine hohe Toleranz gegenüber funktionellen ...
Angela K. Hofmeister, Giulia Iannelli, Péter Angyal, Augustin Malandain, Daniel Kaiser, Boris Maryasin, Hanspeter Kählig, Matteo Barel, Gaia Novarino, Nuno Maulide   +9 more
wiley   +1 more source

Untersuchung von Anti‐Glykan‐Antikörpern und Erforschung ihres medizinischen Potenzials mithilfe synthetischer Glykane

Angewandte Chemie, EarlyView.
Anti‐Glykan‐Antikörper spielen sowohl bei Gesundheit als auch bei Krankheit eine wesentliche Rolle. Der Zugang zu neuartigen Glykanstrukturen ermöglicht Fortschritte bei der Antikörpercharakterisierung für die Entdeckung von Biomarkern, die Antikörperentwicklung und das Impfstoffdesign.
Fabienne Weber, Aina Valenti, Jiří Ledvinka, Oren Moscovitz, Peter H. Seeberger   +4 more
wiley   +1 more source

Katalytische C–F‐Aktivierung bei Raumtemperatur: Enolat Kreuzkupplungen ermöglicht durch [Pd(1‐MeNAP)TFA]2 / LiHMDS

Angewandte Chemie, EarlyView.
Katalysatoren, die aus dem Trifluoroacetat‐verbrückten Methylnaphthyl‐Palladium‐Dimer [Pd(1‐MeNAP)TFA]2 und Biarylphosphin‐Liganden generiert werden, in Kombination mit der Base LiHMDS, fördern α‐Arylierungsreaktionen verschiedener Enolate mit nicht‐aktivierten Arylfluoriden bei Raumtemperatur.
Nele Krüger, Jie Shen, Sourav Manna, Lamphiza O. Najiar, Lukas J. Gooßen   +4 more
wiley   +1 more source

Fluoren-9-one oxime

Acta Crystallographica Section E Structure Reports Online, 2014
In the title molecule, C13H9NO, the fluorene system and the oxime group non-H atoms are essentially coplanar, with a maximum deviation from the fluorene mean plane of 0.079 (2) Å for the oxime O atom. A short intramolecular C—H...O generates anS(6) ring.
Bernhard Bugenhagen, Yosef Al Jasem, Mariam Al-Azani, Thies Thiemann   +3 more
openaire   +3 more sources

Studies on the Fluorene Derivatives. XI

Journal of Synthetic Organic Chemistry, Japan, 1958
2-Methoxyfluorene in glacial acetic acid is nitrated and the products are separated into 2-methoxy-7-nitrofluorene (mp 218-9°C) and 2-methoxy-3-nitrofluorene (mp 190-1°C) with 54% and 9% yield, respectively.2-Methoxy-7-aminofluorene (mp 189-90°C), 2-methoxy-3-aminofluorene (mp 203-4°C), and 2-methoxy-3-acetaminofluorene (mp 241-2°C) are also ...
Nobuo ISHIKAWA, Mitsuo OKAZAKI
openaire   +2 more sources

Catalytic Pyrolysis of Waste Polystyrene Over Fe–B Composite Catalyst for Enhanced Liquid Fuel Production

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Healthcare derived polystyrene waste represents a growing and under addressed fraction of plastic waste streams due to contamination risks and limited recyclability. This study aims to investigate the valorization of waste polystyrene foam through catalytic and noncatalytic pyrolysis pathways to evaluate product yield distribution and identify
Salman Khan, Zahid Hussain, Bilal Ahmad, Naveed Ahmad, Shohreh Azizi   +4 more
wiley   +1 more source

Conjugated Conductive Polymer Binders for Lithium Batteries: Structural Engineering and Design Principles

Carbon Energy, EarlyView.
Structural engineering of conjugated conductive polymer binders enables integrated electronic transport, strong adhesion, and stable electrode interfaces, offering a promising strategy to reduce inactive components and improve the performance of high‐energy lithium batteries.
Fating Wang, Fei Lv, Jingjing Guo, Min Hong, Xia Wang, Xiaohan Cai, Tiefeng Liu, Jun Lu   +7 more
wiley   +1 more source