Results 121 to 130 of about 114,879 (289)

Gold-catalyzed post-Ugi alkyne hydroarylation for the synthesis of 2-quinolones

Beilstein Journal of Organic Chemistry, 2018
A series of propargylamides containing an electron-rich benzene ring was prepared through the Ugi reaction of 3,5-dimethoxyaniline with various propiolic acids, aldehydes and isocyanides. Subjecting these adducts to a gold-catalyzed intramolecular alkyne
Xiaochen Du, Jianjun Huang, Anton A. Nechaev, Ruwei Yao, Jing Gong, Erik V. Van der Eycken, Olga P. Pereshivko, Vsevolod A. Peshkov   +7 more
doaj   +1 more source

Gold(I)-Catalyzed Aromatization: Expeditious Synthesis of Polyfunctionalized Naphthalenes

iScience, 2019
Summary: A gold-catalyzed 6-endo-dig carbocyclization of alkyne with the pendent diazo group is reported. It provides an expeditious approach for the synthesis of multi-functionalized naphthalene derivatives under mild conditions.
Cheng Zhang, Kemiao Hong, Shanliang Dong, Chao Pei, Xiaolu Zhang, Ciwang He, Wenhao Hu, Xinfang Xu   +7 more
doaj   +1 more source

Selective Functionalization of Arene C(sp²)-H Bonds by Gold Catalysis: The Role of Carbene Substituents. [PDF]

ACS Catal, 2022
Pizarro JD, Schmidtke IL, Nova A, Fructos MR, Pérez PJ.   +4 more
europepmc   +1 more source

An Edible H2O2 Biosensor for Gastrointestinal Metabolites and Peroxidase Enzyme Quantification

Advanced Healthcare Materials, EarlyView.
We present an edible biosensor for gastric fluid analysis that integrates a caffeic acid–horseradish peroxidase redox system into an edible electrolyte‐gated transistor. The device enables rapid, low‐volume detection of H2O2 and, with minimal modification, metabolites and enzyme activity in simulated gastrointestinal conditions.
Valerio Francesco Annese, Elena Feltri, Pietro Rossi, Valerio Galli, Cristiano Bortolotti, João Paulo Vita Damasceno, Ivan K. Ilic, Dario Natali, Alessandro Luzio, Adrica Kyndiah, Mario Caironi   +10 more
wiley   +1 more source

Acid, silver, and solvent-free gold-catalyzed hydrophenoxylation of internal alkynes

Beilstein Journal of Organic Chemistry, 2013
A range of arylgold compounds have been synthesized and investigated as single-component catalysts for the hydrophenoxylation of unactivated internal alkynes.
Marcia E. Richard, Daniel V. Fraccica, Kevin J. Garcia, Erica J. Miller, Rosa M. Ciccarelli, Erin C. Holahan, Victoria L. Resh, Aakash Shah, Peter M. Findeis, Robert A. Stockland Jr.   +9 more
doaj   +1 more source

Catalytic electrophilic halogenation of silyl-protected and terminal alkynes: trapping gold(I) acetylides vs. a bronsted acid-promoted reaction [PDF]

, 2012
In the presence of a cationic gold(I) catalyst and N-halosuccinimide, both trimethylsilyl-protected and terminal alkynes are converted into alkynyl halides.
D'Oyley, JM, Rota, F, Sheppard, TD, Starkov, P   +3 more
core  

Smart Face Masks as Wearable Respiratory Sensors: A Review of Sensor Technologies, Materials, and Future Directions

Advanced Healthcare Materials, EarlyView.
This review highlights recent advances in smart face masks that actively monitor breathing. By integrating humidity, gas, temperature, pressure, strain, and triboelectric sensors, these masks track key respiratory parameters in real time. The article summarizes sensor mechanisms, compares performance across studies, and discusses challenges and future ...
Negin Faramarzi, Naseeh Backer Kannanthodi, Alice Nicole Casling, Babar Ali, Samira Lakouraj Mansouri, Alessandro Giuseppe D'aloia, Hossein Cheraghi Bidsorkhi, Maria Sabrina Sarto   +7 more
wiley   +1 more source

Gold-catalyzed reaction of oxabicyclic alkenes with electron-deficient terminal alkynes to produce acrylate derivatives

Beilstein Journal of Organic Chemistry, 2013
Oxabicyclic alkenes can react with electron-deficient terminal alkynes in the presence of a gold catalyst under mild conditions, affording the corresponding addition products in moderate yields.
Yin-wei Sun, Qin Xu, Min Shi
doaj   +1 more source

Dinuclear Gold Complexes Supported by Wide Bite Angle Diphosphines for Preorganization-Induced Selective Dual-Gold Catalysis

Inorganics, 2019
The synthesis, reactivity, and potential of well-defined dinuclear gold complexes as precursors for dual-gold catalysis is explored. Using the preorganizing abilities of well-known wide bite angle diphosphine ligands, DBFPhos and DPEPhos, dinuclear Au(I)&
Marianne Lankelma, Vincent Vreeken, Maxime A. Siegler, Jarl Ivar van der Vlugt   +3 more
doaj   +1 more source

Aptamer‐Based Delivery Systems for VEGF and NGF Modulation in Ocular Therapies

Advanced Healthcare Materials, EarlyView.
Aptamer‐based delivery systems targeting NGF and VEGF hold significant potential for precise and sustained treatment of complex diseases affecting both the anterior and posterior segments of the eye. This review critically summarizes current strategies for NGF and VEGF delivery as well as VEGF sequestration, providing a clinical perspective on how ...
Nadine Best, Gizem Karabiyik, Gerd Geerling, Sarah Barbara Zwingelberg, Gregor Lang, Martin Humenik   +5 more
wiley   +1 more source