Results 51 to 60 of about 12,861 (208)

Organometallic catalysis for applications in radical chemistry and asymmetric synthesis [PDF]

, 2014
Two organometallic catalysis studies are presented. The first one deals with the development of a new catalytic agent based on the mixture of a hydride and an iron salt to trigger efficient radical cyclization processes.
Ateywiohrera, Augé, Baguley, Barbazanges, Broere, Ekomie, Fujita, Harrak, Inoue, Leca, Liu, Raducan, Renaud, Shibata, Short, Tanaka, Watson, Zuccaccia   +17 more
core   +3 more sources

Pd(II)‐Catalyzed Strategies for the β‐Arylation of α‐Amino Acids: An Overview

Chemistry – A European Journal, EarlyView.
The graphical abstract summarizes the review “Pd(II)‐Catalyzed Strategies for the β‐Arylation of α‐Amino Acids: An Overview”, highlighting representative Pd(II)‐catalyzed methods for the β‐arylation of α‐amino acids. Key mechanistic features, substrate diversity, and synthetic relevance of these transformations are showcased. Abstract Metal‐catalyzed C─
Davide Illuminati, Claudio Trapella, Vinicio Zanirato, Virginia Cristofori, Anna Fantinati   +4 more
wiley   +1 more source

Synthesis of 2-Aryl-5-Nitropyridines by Three-Component Ring Transformation of 3,5-Dinitro-2-Pyridone [PDF]

, 2014
2-Arylated-5-nitropyridines were efficiently synthesized by a three-component ring transformation of 3,5-dinitro-2-pyridone with aromatic ketones in the presence of ammonium acetate, in which the dinitropyridone serves as a synthetic equivalent of an ...
1310, 1311, 1312, 1313, 1314, 1315, Asahara, Haruyasu, Kobiro, Kazuya, Le, Thi Song, Nishiwaki, Nagatoshi, Saigo, Kazuhiko, Sugimoto, Ryuichi   +11 more
core   +1 more source

Aldol elaboration of 4,5,6,7-tetrahydroisoxazolo[4,3-c]pyridin-4-ones, masked precursors to acylpyridones

Beilstein Journal of Organic Chemistry, 2012
A core 4,5,6,7-tetrahydroisoxazolo[4,3-c]pyridine-4-one scaffold is elaborated at C-3(Me) by base-mediated aldol condensation to give new 3-alkenyl-4,5,6,7-tetrahydroisoxazolo[4,3-c]pyridine-4-ones, which are masked forms related to the acylpyridone ...
Raymond C. F. Jones, Abdul K. Choudhury, James N. Iley, Mark E. Light, Georgia Loizou, Terence A. Pillainayagam   +5 more
doaj   +1 more source

Transacylierungen mit Acylderivaten des 4‐Pyridons [PDF]

Chemische Berichte, 1980
AbstractMit N‐Acyl‐4‐pyridonen (2a, b) sowie mit 4‐(Benzoyloxy)pyridin (3a) werden in Methylenchlorid oder Chloroform aliphatische und aromatische Amine sowie Thiole glatt zu den Amiden (4 – 6) und Thioestern (7, 8) acyliert. Primäre und sekundäre Alkohole reagieren langsamer, tert‐Butylalkohol nur noch mit 3a unter Basenkatalyse sowie mit den ...
Effenberger, Franz, Bessey, Eberhard
openaire   +1 more source

Photochemistry of Aromatic N‐Oxides in Water Probed by Time‐Resolved X‐ray Absorption Spectroscopy

Chemistry – A European Journal, EarlyView.
Time‐resolved XAS at the nitrogen and oxygen K‐edges is applied to the photorearrangement of two N‐oxides in water. Pyridine N‐oxide rapidly forms the oxaziridine isomer. Pyridazine N‐oxide undergoes ring opening to the diazo compound, without any evidence of intermediates.
Maximilian Paradiz Domínguez, Robby Büchner, Mattis Fondell, Albert M. Brouwer   +3 more
wiley   +1 more source

Copper‐ and Silver‐Catalyzed Reactions of Active Methylene Isocyanides: Facile Access to Highly Substituted Five‐ and Six‐Membered Heterocycles

Chemistry – A European Journal, EarlyView.
This review summarizes recent advances in copper‐ and silver‐catalyzed reactions of active methylene isocyanides for the synthesis of highly substituted five‐ and six‐membered heterocycles. Emphasis is placed on [3+n] cycloadditions, annulations, and asymmetric strategies, highlighting current limitations and future opportunities in heterocycle ...
Jimil George, Kyungsoo Oh
wiley   +1 more source

Electrochemical behaviour of activated carbons obtained via hydrothermal carbonization [PDF]

, 2015
Activated carbons were prepared by chemical activation of hydrochars, obtained by hydrothermal carbonisation (HTC) using low cost and abundant precursors such as rye straw and cellulose, with KOH.
Cazorla-Amorós, Diego, Lozano-Castello, Dolores, Morallon, Emilia, Salinas-Torres, David, Titirici, Maria-Magdalena, Yu, Linghui, Zhao, Li   +6 more
core   +2 more sources

Profiling of HCAR1 signalling reveals Gαi/o and Gαs activation without β‐arrestin recruitment and the discovery of an allosteric agonist

British Journal of Pharmacology, EarlyView.
Abstract Background and Purpose Lactate, historically viewed as a metabolic by‐product, has emerged as a signalling molecule via the G protein–coupled receptor Hydroxycarboxylic Acid Receptor 1 (HCAR1). The receptor is primarily expressed in adipocytes but also found in various other tissues.
Simon Lind, Shane C. Wright, Emilia Gvozdenovic, Kristina Nilsson, Kenneth L. Granberg, Michel Bouvier, Linda C. Johansson   +6 more
wiley   +1 more source

rac-2-Methyl-3,4,5,6-tetrahydro-2H-2,6-methano-1,3-benzoxazocin-4-one

Acta Crystallographica Section E, 2010
The title compound, C12H13NO2, represents a conformationally restricted 2-pyridone analogue of 1,4-dihydropyridine-type calcium antagonists and was selected for a crystal structure determination in order to explore some aspects of drug-receptor ...
Viktor Kettmann, Jan Světlík, Lucia Veizerová   +2 more
doaj   +1 more source