Results 31 to 40 of about 4,491 (261)

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

Prenylated Benzophenones from

Natural Product Communications, 2008
The roots of Hypericum hypericoides (Clusiaceae) have yielded five prenylated benzophenone derivatives. Three of these are new: 18-hydroxy-7-epi-clusianone, 18-hydroxyclusianone, isolated as the acetate, and 18-hydroxyhyperibone K.
Omar E. Christian, Stewart McLean, William F. Reynolds, Helen Jacobs   +3 more
doaj   +1 more source

Potassium‐Ligand Cooperation Facilitated Chemical Bond Activation and Catalytic Hydrogenation

Angewandte Chemie, EarlyView.
A new strategy for alkali metal‐mediated catalysis based on metal–ligand cooperation (MLC) is presented. Potassium pincer complexes exhibit remarkable reactivity toward a range of molecules via an unprecedented potassium–ligand cooperative mechanism. This reactivity enables potassium‐catalyzed hydrogenation, providing efficient reduction of ketones and
Yaoyu Liang, Irena Efremenko, Thiyagarajan Subramanian, Amit Kumar, Liat Avram, Yael Diskin‐Posner, David Milstein   +6 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

Dose Response Relationship for benzophenones.

, 2013
Dose Response Relationship for benzophenones.
Laurence Coiffard (292809), Eva Paparis (292808), Catherine Chauvet (292807), Céline Couteau (292806)   +3 more
core   +1 more source

Phosphoryl Radicals from Trivalent Iminyl Phosphines: A Photocatalytic Approach to N‐Phosphoryl Azetidines

Angewandte Chemie, EarlyView.
Photochemically generated phosphoryl radicals from iminyl phosphines enable strain‐release addition to azabicyclobutanes, providing access to elusive N‐phosphoryl azetidines. Combined experimental, computational, and EPR studies reveal an unconventional water‐assisted photoredox pathway.
Chandu G. Krishnan, Gabriel Cormier, Stefano A. Serapian, Marco Bortolus, Luca Dell'Amico   +4 more
wiley   +2 more sources

Benzophenone Photosensitized DNA Damage

Accounts of Chemical Research, 2012
Although the carcinogenic potential of ultraviolet radiation is well-known, UV light may interact with DNA by direct absorption or through photosensitization by endogenous or exogenous chromophores. These chromophores can extend the "active" fraction of the solar spectrum to the UVA region and beyond, which means that photosensitizers increase the ...
Cuquerella Alabort, Maria Consuelo, Cadet, Jean, Miranda Alonso, Miguel Ángel, Lhiaubet, Virginie Lyria   +3 more
openaire   +3 more sources

Color‐Pure Organic Luminophores: Characteristics, Definitions, Physical Basis and Fundamental Design Principles

Angewandte Chemie, EarlyView.
Color‐pure all‐organic emitters, i.e., with narrow spectral characteristics, are intensively studied for high‐definition organic LEDs and multi‐color bioimaging. In order to guide targeted materials design, this educative review discusses spectral characteristics, proper definitions and units, and the physical basis of spectral broadening, to distill ...
Johannes Gierschner, Sunwu Song, Siyang Feng, Liangxuan Wang, Miguel Ródenas, Begoña Milián‐Medina, Min Sang Kwon   +6 more
wiley   +2 more sources

Safety of benzophenone to be used as flavouring [PDF]

EFSA Journal, 2017
Benzophenone [FL-no: 07.032] has been evaluated as a flavouring substance, in FGE.69, by the EFSA Panel on Food Additives, Flavourings, Processing Aids and Materials in Contact with Food in 2008. Benzophenone was evaluated also by JECFA (2011) and by IARC (2013) based on studies that were not considered in the EFSA opinion on FGE.69.
Silano, Vittorio, Bolognesi, Claudia, Castle, Laurence, Chipman, Kevin, Cravedi, Jean-Pierre, Engel, Karl-Heinz, Fowler, Paul, Franz, Roland, Grob, Konrad, Gürtler, Rainer, Husøy, Trine, Kärenlampi, Sirpa, Milana, Maria Rosaria, Pfaff, Karla, Riviere, Gilles, Srinivasan, Jannavi, Tavares Poças, Maria de Fátima, Tlustos, Christina, Wölfle, Detlef, Zorn, Holger, Benigni, Romualdo, Binderup, Mona-Lise, Brimer, Leon, Marcon, Francesca, Marzin, Daniel, Mosesso, Pasquale, Mulder, Gerard, Oskarsson, Agneta, Svendsen, Camilla, Anastassiadou, Maria, Carfì, Maria, Saarma, Siiri, Mennes, Wim, EFSA Panel on Food Contact Materials, Enzymes, Flavourings and Processing Aids (CEF)   +33 more
openaire   +5 more sources

Droplet Electricity Generators With Maximized Energy Collection Zone Enabled by Aloe‐Inspired Midrib and Cuticle

Advanced Materials, EarlyView.
An Aloe‐pinspired droplet electricity generator (A‐DEG) overcomes the limited energy collection zone of conventional DEGs by guiding impact droplets through a channeling midrib and artificial cuticle. The channeling midrib induces uni‐directional droplet spreading, while the artificial cuticle on the midrib further reinforces this behavior through its ...
Gibeom Lee, Eunbyeol Kim, Kyongtae Choi, Minjun Song, Sunmin Jang, Dongwhi Choi, Donghyun Seo, Min‐Gyu Lee, Younghoon Lee   +8 more
wiley   +1 more source