Results 111 to 120 of about 253,481 (293)

The C(3P) + NH3 reaction in interstellar chemistry: II. Low temperature rate constants and modeling of NH, NH2 and NH3 abundances in dense interstellar clouds

, 2015
A continuous supersonic flow reactor has been used to measure rate constants for the C + NH3 reaction over the temperature range 50 to 296 K. C atoms were created by the pulsed laser photolysis of CBr4.
Bourgalais, Jérémy, Capron, Michael, Goulay, Fabien, Hickson, Kevin M., Loison, Jean-Christophe, Picard, Sebastien D. Le, Wakelam, Valentine   +6 more
core   +3 more sources

Convergent Total Synthesis of 16β‐Hydroxylpseudobufarenogin

Angewandte Chemie, EarlyView.
We present a novel convergent strategy that integrates Pd/Ag‐promoted Suzuki–Miyaura coupling with Ir‐catalyzed radical‐relay cyclization, enabling the first total synthesis of 16β‐hydroxylpseudobufarenogin. This approach is broadly applicable to the total synthesis of various oxygenated bufadienolides by simply modifying the fragment structures ...
Wataru Shigematsu, Yo Matsumoto, Koichi Hagiwara, Masayuki Inoue   +3 more
wiley   +2 more sources

Synergistische Entwicklungsstrategien von Inhibitoren gegen humane UDP‐Galactose‐4‐Epimerase

Angewandte Chemie, EarlyView.
Die Epimerase GalE ist essenziell für die Biosynthese von krebsrelevanten O‐GalNAc Glykanen. Wir verwenden orthogonales, strukturbasiertes Screening niedermolekularer Fragmente an, um kovalente und nichtkovalente Inhibitoren gegen GalE mit nicht mehr als 22 optimierten Verbindungen zu erhalten.
William M. Browne, Jonathan Pettinger, Teresa Weckwerth, Andrew Purkiss, Sing Hei Lok, Louisa Penicaut, Roksana Ogrodowicz, Raveena Prema, Simone Kunzelmann, Chloe Roustan, Ganka Bineva‐Todd, Saskia Pieters, Francesca Zappacosta, Alfred E. Doherty, Isobel Oram, Christelle Soudy, Robert Quinlan, Joanna Redmond, Svend Kjaer, David House, Stephane Mouilleron, Jacob T. Bush, Benjamin Schumann   +22 more
wiley   +1 more source

Prediction of Room‐Temperature Superconductivity in Quasi‐Atomic H2‐Type Hydrides at High Pressure

Advanced Science
Achieving superconductivity at room temperature (RT) is a holy grail in physics. Recent discoveries on high‐Tc superconductivity in binary hydrides H3S and LaH10 at high pressure have directed the search for RT superconductors to compress hydrides with ...
Qiwen Jiang, Defang Duan, Hao Song, Zihan Zhang, Zihao Huo, Shuqing Jiang, Tian Cui, Yansun Yao   +7 more
doaj   +1 more source

Role of Alkaline-Earth Metal-Catalyst: A Theoretical Study of Pyridines Hydroboration

Frontiers in Chemistry, 2019
Density functional theory (DFT) calculations have been performed to investigate the mechanism of alkaline-earth-metal-catalyzed hydroboration of pyridines with borane.
Yuanyuan Li, Yuanyuan Li, Yuanyuan Li, Meijun Wu, Haohua Chen, Dongdong Xu, Lingbo Qu, Jing Zhang, Ruopeng Bai, Yu Lan, Yu Lan   +10 more
doaj   +1 more source

Understanding β-Hydride Eliminations from Heteroatom Functional Groups [PDF]

, 2011
Using density functional theory, we investigated detailed aspects of the quintessential organometallic process, β-hydride elimination (BHE). In general, we find that most BHE processes from alkyl functional group β-atoms are facile, while BHE processes ...
Goddard, William A. III, Theofanis, Patrick L.   +1 more
core   +1 more source

Cobalt‐Catalyzed Intramolecular C─H Silylation of Arenes

Angewandte Chemie, EarlyView.
Direct C─Si bond formation via C─H silylation is an atom‐economical route to organosilanes but is largely limited to noble metals. We report the first cobalt‐catalyzed intramolecular arene C–H silylation enabled by HCo(PMe3)4, which activates Si–H and C–H bonds to form diverse silacycles and silafluorenes in high yields with broad functional‐group ...
Yongqiang Xu, Valentin Poirier, Gilles Lemière, Julie Oble, Marc Petit   +4 more
wiley   +2 more sources

Structural Transformation of Metastable Two-Electron Superatom Au-Doped Cu-Rich Alloy Nanocluster

Molecules
The ability to fabricate bimetallic clusters with atomic precision offers promising prospects for elucidating the correlations between their structures and properties.
Rhone P. Brocha Silalahi, Samia Kahlal, Jean-Yves Saillard, C. W. Liu   +3 more
doaj   +1 more source

Radikale Kaskadenreaktion, welche die Kreuzkupplung von Olefinen mit der Smiles‐Truce‐Umlagerung kombiniert

Angewandte Chemie, EarlyView.
Wir stellen eine kobaltkatalysierte Radikalkaskade vor, die zwei Alken Ausgangsstoffe effizient miteinander verbindet und so in einem einzigen Schritt mehrere Bindungen aufbaut. Der Prozess beginnt mit einem kobaltkatalysierten Wasserstoffatomtransfer an eine Styrol‐Doppelbindung, gefolgt von einer Giese‐Addition.
Jingyang Qin, Lucas Popek, Moritz Wyrtki, Christopher J. Teskey   +3 more
wiley   +1 more source

Alcohol‐Directed Carboamination of Conjugated Enynes

Angewandte Chemie, EarlyView.
The first general three‐component intermolecular Pd‐catalyzed carboamination of conjugated enynes enables the coupling of anilines and aryl triflates to produce functionalized allenic amines, utilizing a native alcohol directing group to control regioselectivity.
Helena Solé‐Àvila, Duncan K. Brownsey, Hugo Senelle, Jerome Waser   +3 more
wiley   +2 more sources