Results 111 to 120 of about 197,331 (314)

Expanding the Chemical Space of Cyclic Polyphthalaldehyde via Post‐Functionalization

Advanced Science, EarlyView.
In this work, we developed a post‐functionalization approach to achieve water‐soluble cyclic polyphthalaldehyde (cPPA) polymers via click chemistry. ABSTRACT Cyclic polyphthalaldehydes (cPPAs) are hydrophobic cyclic polymers with stimuli‐responsive depolymerization property. The introduction of hydrophilic functionalities to cPPAs is challenging due to
Liting He, Haiyan Zhou, Qiushi Chen, Xing Guo, Han Liu, Xuechen Li   +5 more
wiley   +1 more source

Stable BF2 Boracycles as Versatile Reagents for Selective Ortho C–H Functionalization

Angewandte Chemie International Edition, EarlyView.
We report a robust, metal‐free and scalable synthesis of stable BF2 boracycles via directed ortho CH borylation, delivering isolable, shelf‐stable reagents without chromatographic purification. These BF2 boracycles exhibit unique and tunable reactivity, enabling highly selective ipso‐functionalization across a broad range of transformations.
Ganesh H. Shinde, Jonatan Babiker, Michelle Mebrahtu, Anaïs Prigent, Gauthier Foucras, Yogesh N. Aher, Francoise M. Amombo Noa, Magnus J. Johansson, Janez Košmrlj, Ross D. Jansen‐van Vuuren, Thomas Cailly, Henrik Sundén   +11 more
wiley   +2 more sources

Synthesis of Functionalized Azobiphenyl‐ and Azoterphenyl‐ Ditopic Linkers: Modular Building Blocks for Photoresponsive Smart Materials

ChemistryOpen, 2019
Modular synthesis of structurally diverse functionalized azobiphenyls and azoterphenyls for the realization of optically switchable materials has been described.
Dr. Sylvain Grosjean, Patrick Hodapp, Dr. Zahid Hassan, Prof. Dr. Christof Wöll, Dr. Martin Nieger, Prof. Dr. Stefan Bräse   +5 more
doaj   +1 more source

PERFIL VOLÁTIL DO Coffea arabica E Coffea canephora var. conilon POR SHS-GC-MS E QUIMIOMETRIA [PDF]

Química Nova
The volatile composition of coffee exerts a substantial influence on its quality, as it defines the characteristics of the beverage. However, these compounds are influenced by factors within the coffee production chain, such as botanical origin ...
Marcos Valério Vieira Lyrio, Pedro Henrique Pereira da Cunha, Danieli Grancieri Debona, Bárbara Zani Agnoletti, Roberta Quintino Frinhani, Emanuele Catarina da Silva Oliveira, Paulo Roberto Filgueiras, Lucas Louzada Pereira, Eustáquio Vinicius Ribeiro de Castro   +8 more
doaj   +1 more source

Halogen‐Bond Coupled Halogenated‐π‐Conjugation Enables Giant Birefringence in Hydrogen‐Bonded Organic Frameworks

Advanced Science, EarlyView.
The perfect crystal packing achieved via the halogen‐bond (XB) coupled halogenated‐π‐conjugation strategy effectively induces an ultrahigh birefringence (Δn = 0.97), which exhibits promising potential in polarization control and phase modulation.
Miao‐Bin Xu, Yun‐Xia Hu, Ming‐Chang Wang, Jia‐Jia Li, Jia‐Min Lian, Jin Chen, Ke‐Zhao Du   +6 more
wiley   +1 more source

Copper‐Catalyzed Three‐Component Selective 1,4‐Amino Oxygenation of 1,3‐Dienes

Angewandte Chemie International Edition, EarlyView.
Enclosed is a copper‐catalyzed selective 1,4‐amino oxgenation of 1,3‐dienes with the presence of a strong Brønsted acid. This three‐component transformation offers a novel and powerful approach to construct (E)‐1,4‐allylic amino oxygenated motifs by the simultaneous installation of structurally diverse alkylamines and alcohols directly onto 1,3‐dienes.
Guangshou Feng, Maria K. Velopolcek, Qiu Wang   +2 more
wiley   +2 more sources

Method for forming hermetic seals [PDF]

, 1987
The firmly adherent film of bondable metal, such as silver, is applied to the surface of glass or other substrate by decomposing a layer of solution of a thermally decomposable metallo-organic deposition (MOD) compound such as silver neodecanoate in ...
Gallagher, Brian D.
core   +1 more source

Benzene C−H Bond Activation in Carboxylic Acids Catalyzed by O-Donor Iridium(III) Complexes: An Experimental and Density Functional Study [PDF]

, 2010
The mechanism of benzene C−H bond activation by [Ir(μ-acac-O,O,C^3)(acac-O,O)(OAc)]_2 (4) and [Ir(μ-acac-O,O,C^3)(acac-O,O)(TFA)]_2 (5) complexes (acac = acetylacetonato, OAc = acetate, and TFA = trifluoroacetate) was studied experimentally and ...
Bhalla, Gaurav, Bischof, Steven M., Ess, Daniel H., Goddard, William A., III, Meier, Steven K., Nielsen, Robert J., Oxgaard, Jonas, Periana, Roy A.   +7 more
core   +1 more source

Pyrazolopyridines II: synthesis and antibacterial screening of 6-aryl-3-methyl-1-phenyl-1H-pyrazolo[3,4-b]pyridine-4-carboxylic acids

, 2014
5-Amino-3-methyl-1-phenyl-1H-pyrazole was prepared to react with various aromatic aldehydes and pyruvic acid to afford 6-aryl-3-methyl-1-phenyl-1H-pyrazolo[3,4-b]pyridine-4-carbxylic acids.
T. Maqbool, A. Nazeer, M. N. Khan, M. Elliott, M. Khan, M. Ashraf, Muhammad Nasrullah, Shafia Arshad, M. Munawar   +8 more
semanticscholar   +1 more source

Perspectives on Synthetic Adducts (Salts) of Nitroxoline^TM and 2-Aminoquinolin-8-ol as Promising Antibacterial Agents

Chemistry Proceedings
The threatening phenomenon of antibiotic failure in the future determines the intensive research of antibacterial active compounds, which are promising candidates as antibiotics.
Tibor Maliar, Renata Gašparová, Mária Maliarová   +2 more
doaj   +1 more source