Results 21 to 30 of about 3,486 (208)

DDQ/PbO2: a Novel Oxidation System for Hindered Electron Rich Benzhydrols

Molecules, 2000
A convenient mild protocol for oxidation of highly hindered electron rich benzhydrols using DDQ / PbO2 has been developed.
G. P. Kalena, S. M. Jadhav, A. Banerji
doaj   +1 more source

Benzophenones, bisphenols and other polychlorinated/phenolic substances in Danish infants and their parents – including longitudinal assessments before and after introduction to mixed diet

Environment International, 2022
Background: Humans are widely exposed to chemicals with known or suspected endocrine disrupting effects. Among those are several benzophenones, bisphenols and other phenols commonly used in consumer products.
Hanne Frederiksen, Marie Lindhardt Ljubicic, Emmie N. Upners, Margit Bistrup Fischer, Alexander Siegfried Busch, Casper P. Hagen, Anders Juul, Anna-Maria Andersson   +7 more
doaj   +1 more source

Benzophenones from Anemarrhena asphodeloides Bge. Exhibit Anticancer Activity in HepG2 Cells via the NF-κB Signaling Pathway

Molecules, 2019
A chemical investigation of the fibrous roots of Anemarrhena asphodeloides Bge. led to the isolation of four benzophenones, including one new compound (1) and three known ones (2−4).
De-Ling Wu, Zhen-Dong Liao, Fang-Fang Chen, Wei Zhang, Ya-Shuo Ren, Can-Can Wang, Xiao-Xiao Chen, Dai-Yin Peng, Ling-Yi Kong   +8 more
doaj   +1 more source

Transition-metal-free trifluoromethylthiolation–acylation of arynes by insertion into the C–S bonds

Green Synthesis and Catalysis, 2021
An efficient procedure to access to ortho-SCF3 substituted benzophenones from arynes and trifluoromethylthioesters has been developed under transition-metal free conditions. This difunctionalization process involves the first insertion of arynes into the
Chengyao Kimmy Cao, Evgeny Tretyakov, Chao Chen   +2 more
doaj   +1 more source

Chlorination and chloramination of benzophenone-3 and benzophenone-4 UV filters

Ecotoxicology and Environmental Safety, 2018
The objective of this research was to explore the fundamental reactions between chlorine/chloramine and 2-hydroxyl-4-methoxyl benzophenone (BP3)/2-hydroxyl-4-methoxyl benzophenone-sulfonic acid (BP4), which were the most common reactions in benzophenone-type UV filters during drinking water treatment processes.
Peizeng, Yang, Deyang, Kong, Yuefei, Ji, Junhe, Lu, Xiaoming, Yin, Quansuo, Zhou   +5 more
openaire   +2 more sources

Photoswitchable Ambiphilicity: Light‐Gated Frustrated Lewis Pair Reactivity and Z‐Type Interaction

Angewandte Chemie, EarlyView.
Light‐controlled ambiphilicity is realized in photoswitchable intramolecular phosphorus/boron Lewis pairs. Reversible switching modulates both the thermodynamics and kinetics of frustrated Lewis‐pair reactivity, enabling light‐gated CO2 binding and release.
Lennart Stoess, Emil L. M. Paulin, Fabian Michel, Lutz Greb   +3 more
wiley   +2 more sources

Multiclass Determination of Endocrine-Disrupting Chemicals in Meconium: First Evidence of Perfluoroalkyl Substances in This Biological Compartment

Toxics
Major concerns have been raised about human exposure to endocrine-disrupting chemicals (EDCs) during pregnancy. Effective methodologies for the assessment of this exposure are needed to support the implementation of preventive measures and the prediction
Aritz Domínguez-Liste, Teresa de Haro-Romero, Raquel Quesada-Jiménez, Ainhoa Pérez-Cantero, Francisco Manuel Peinado, Óscar Ballesteros, Fernando Vela-Soria   +6 more
doaj   +1 more source

One‐Pot Biphasic Photocatalytic CO2‐to‐Carbonylation Cascades

Angewandte Chemie, EarlyView.
Bioinspired biphasic compartmentalization enables one‐pot cascades where photocatalytic CO2 reduction generates CO for carbonylative cross‐couplings to synthesize complex organic products, including a pharmaceutical. ABSTRACT Photosynthesis compartmentalizes reactions across the thylakoid membrane in vivo to upcycle CO2 into complex chemicals that are ...
Sampurna Mitra, David M. Vahey, Shannon A. Bonke, Erwin Reisner   +3 more
wiley   +2 more sources

Should I Stay or Should I Go—Leveraging an Overlooked Feature of Click‐to‐Release Chemistry for Affinity Labeling

Angewandte Chemie, EarlyView.
Click‐to‐release (C2R) chemistry is redirected from payload liberation toward ligand‐directed covalent protein labeling through a transient dihydropyridazine methide (DHP‐methide). This concept opens the way to dual‐functional systems combining covalent target engagement with controlled effector release.
Dóra Kern, Krisztina Németh, Tímea Imre, József Simon, Kitti Meggyes, Gergő Bárdos, László Petri, Márton Bojtár, Attila Kormos, Péter Kele   +9 more
wiley   +2 more sources

Implantable Ionic Memristors Based on Natural Polymer Heterojunctions

Advanced Functional Materials, EarlyView.
We report an implantable natural polymer‐based ionic memristor composed of hyaluronic acid, chitosan, and PDMS. The device achieved 98.94% accuracy in MNIST classification while reducing training time by 36.8% compared with a conventional artificial neural network (ANN).
Dong‐yup Lee, Byung Ik Park, Gihyeon Yim, Hyunjae Yoo, Sangjun Ma, Jundong Park, Jeong‐Yun Sun   +6 more
wiley   +1 more source