Results 71 to 80 of about 112,449 (386)

Tunable Preparation of α‐Aminoacyl Fluorides and α‐Fluoroamides via Base‐Induced Cascade Multiple‐Cleavage Processes from Bromodifluorohydrin Reagents and Amines

Advanced Synthesis &Catalysis, EarlyView.
A mild and versatile strategy enabling the divergent synthesis of α‐fluoroamides and α‐aminoacyl fluorides from 2‐bromo‐2,2‐difluoro alcohols and amines is developed. The reaction shows broad scope and operational simplicity. Mechanistic and density functional theory studies support the formation of a putative gem‐difluoroepoxide intermediate ...
Giulia De Santis, Andrea Maranzana, Federica Lauria, Mauro Spennacchio, Michael Andresini, Rosa Purgatorio, Marco Colella, Renzo Luisi, Leonardo Degennaro   +8 more
wiley   +1 more source

[Bis(Trimethylsilyl)Methyl]Lithium and -Sodium: Solubility in Alkanes and Complexes with O- and N- Donor Ligands

Inorganics, 2017
In contrast to alkyl compounds of lithium, which play an important role in organometallic chemistry, the corresponding heavier alkali metal compounds are less investigated.
Markus von Pilgrim, Mihail Mondeshki, Jan Klett   +2 more
doaj   +1 more source

Impaired nutrient signaling and body weight control in a Na⁺ neutral amino acid cotransporter (Slc6a19)-deficient mouse [PDF]

, 2015
Amino acid uptake in the intestine and kidney is mediated by a variety of amino acid transporters. To understand the role of epithelial neutral amino acid uptake in whole body homeostasis, we analyzed mice lacking the apical broad-spectrum neutral (0 ...
Bailey, Charles G., Bröer, Angelika, Bröer, Stefan, Holst, Jeff, Juelich, Torsten, Rasko, John E J, Solomon, Peter S, Tietze, Nadine, Vanslambrouck, Jessica M   +8 more
core   +1 more source

Homeostasis of Gut Microbiota Protects against Susceptibility to Fungal Pneumonia

Advanced Science, EarlyView.
Fungal pneumonia induces inflammation, shown by heightened IL‐6, IL‐1β, TNF‐α levels and a growth in Staphylococcus in the alveolar flora. The gut microbiota, acting through the gut‐lung axis via blood, impacts fungal pneumonia susceptibility by altering lung metabolism and inflammatory responses.
Jian Ji, Yongli Ye, Jiadi Sun, Lina Sheng, Jinyou Li, Jin Yang, Bing Wu, Yuting Wang, Xingxing Gao, Liang Luo, Jianfeng Ping, Yinzhi Zhang, Xiulan Sun   +12 more
wiley   +1 more source

Potassium chloridotris(hypersiloxy)aluminate dimer

Acta Crystallographica Section E: Crystallographic Communications, 2019
The tris(trimethylsilylsiloxide) ligand, also known as hypersiloxide, is an extremely bulky group. In an attempt to make the monomeric Al(OSi(SiMe3)3)3, AlCl3 was combined with 3 equiv. of potassium hypersiloxide.
Andrew P. Purdy, Raymond J. Butcher
doaj   +1 more source

Straightforward Synthesis of α,β-Unsaturated Thioesters via Ruthenium-Catalyzed Olefin Cross-Metathesis with Thioacrylate [PDF]

, 2008
The cross-metathesis reaction of S-ethyl thioacrylate with a variety of olefins is effectively catalyzed by using a ruthenium benzylidene olefin metathesis catalyst.
Feringa, Ben L.,, Minnaard, Adriaan J.,, Zijl, Anthoni W. van,   +2 more
core   +1 more source

Determination of the Experimental Minimal Formula of Metal‐Organic Frameworks

Advanced Science, EarlyView.
We present a simple yet rigorous method to determine the precise chemical composition of metal‐organic frameworks using Nuclear Magnetic Resonance (NMR), Thermogravimetric Analaysis (TGA), and ultraviolet‐visible (UV‐vis) spectroscopy. This approach reveals overlooked inorganic ligands and provides accurate experimental molar masses, enhancing ...
Jikson Pulparayil Mathew, Charlotte Simms, David E. Salazar Marcano, Evert Dhaene, Tatjana N. Parac‐Vogt, Jonathan De Roo   +5 more
wiley   +1 more source

Ligand‐Controlled Chemoselectivity in the Rhodium‐Catalyzed Synthesis of Pentafulvenes via (2 + 2 + 1) Alkyne Cyclotrimerization

Angewandte Chemie, EarlyView.
Chemoselectivity Challenge: A precise catalyst design allows for chemoselectivity control over alkyne reactivity to yield pentafulvenes via (2 + 2 + 1) cyclotrimerization. Operative mechanism has been elucidated by means of stoichiometric and deuteration experiments, as well as DFT calculations.
Belinda Español‐Sánchez, Jesús Moradell, María Galiana‐Cameo, Eduardo Barrenas, Jesús J. Pérez‐Torrente, Vincenzo Passarelli, Ricardo Castarlenas   +6 more
wiley   +2 more sources

Types and properties of metal-free catalysts for living polymerizations of biomaterials [PDF]

, 2008
Syntéza biokompatibilních a biodegradabilních polyesterů, použitelných převážně v medicíně, využívá pro polymeraci za otevření kruhu katalyzátory na bázi kovu (např. Sn, Al atd.), které se mohou po implantaci deponovat v těle.
Repka, Martin
core  

Structurally Constrained Cyclic (Diacyloxyiodo)Arenes as an Enabling Platform for Hypervalent Iodine(III) Chemistry

Advanced Science, EarlyView.
We developed cyclic (diacyloxyiodo)arenes to overcome the reactivity/selectivity paradox in iodine chemistry. This new platform enables simple, one‐pot synthesis of diverse hypervalent iodine(III) reagents. The method is sustainable, catalytic, works for asymmetric reactions, and is biocompatible (e.g., modifying peptides).
Shengyu Zhong, Shaoyan Gan, Xin Zhang, Lijuan Song, Lei Shi   +4 more
wiley   +1 more source