Results 71 to 80 of about 22,823 (226)

Sulfur Ylides in Skeletal‐Editing—Ring Expansion Reactions

Helvetica Chimica Acta, EarlyView.
Sulfur ylides (S‐ylides) are emergent diazo surrogates that enable skeletal editing and ring expansion with safer handling and broad functional group tolerance. This perspective covers pioneer works and highlights recent advances in the field, while outlining key challenges and future directions that may redefine the role of S‐ylides in modern ...
Arsala Kamal, Olaf Tjabben, Ana Matošević, Olga García Mancheño   +3 more
wiley   +1 more source

Antibacterial Activity of Synthesized Derivatives of Purpurin Containing Cyсlopropane and Cyclobutane Fragment

Eurasian Chemico-Technological Journal, 2020
The present study is a continuation of the scientific research works for the synthesis of anthraquinonе-containing derivatives with cyclic ring systems by the interaction of 1,2,4-trihydroxyanthraquinone (purpurin) with cyclopropanecarboxylic acid ...
Т. V. Kharlamova, A. V. Gabdrakipov, P. B. Seidakhmetova, K. D. Praliyev   +3 more
doaj   +1 more source

Cyclobutane-1,2-dione

Acta Crystallographica Section E Structure Reports Online, 2007
The title compound, C4H4O2, was prepared as an inter­mediate in the synthesis of α-hydroxy­cyclo­propane­carboxylic acid. The structure of this inter­mediate has only been deduced previously from 1H NMR spectra, elemental analysis or chemical derivatization.
Richard Betz, Peter Klüfers
openaire   +1 more source

Diverse reactivity of maleimides in polymer science and beyond

Polymer International, Volume 74, Issue 4, Page 296-306, April 2025.
This mini‐review provides a thorough overview of maleimide chemistry, highlighting its diverse reactivity in polymer and materials science applications. Abstract Maleimides are remarkably versatile functional groups, capable of participating in homo‐ and copolymerizations, Diels–Alder and (photo)cycloadditions, Michael additions, and other reactions ...
Bruce E Kirkpatrick, Kristi S Anseth, Tayler S Hebner   +2 more
wiley   +1 more source

2,2^′-[2,4-Bis(4-chlorophenyl)cyclobutane-1,3-diyl]bis(8-bromo-6-chloro-3-nitroimidazo[1,2-a]pyridine)

Molbank
In the context of our ongoing studies on 3-nitroimidazo[1,2-a]pyridine derivatives as potent antileishmanial compounds, we isolated a new unexpected compound from the spontaneous cycloaddition of N-[2-(8-bromo-6-chloro-3-nitroimidazo[1,2-a]pyridin-2-yl ...
Inès Jacquet, Romain Paoli-Lombardo, Caroline Castera-Ducros, Patrice Vanelle, Nicolas Primas   +4 more
doaj   +1 more source

Charge Delocalization in Self-Assembled Mixed-Valence Aromatic Cation Radicals [PDF]

, 2012
The spontaneous assembly of aromatic cation radicals (D+•) with their neutral counterpart (D) affords dimer cation radicals (D2+•). The intermolecular dimeric cation radicals are readily characterized by the appearance of an intervalence charge-resonance
Badger B., Badger B., Banerjee M., Banerjee M., Banerjee M., Bartholomew G. P., Bartholomew G. P., Bauerle P., Benesi H. A., Berresheim A. J., Bockman T. M., Burggraf M., Chebny V. J., Chebny V. J., Chebny V. J., Davis W. B., Dewar M. J. S., Fichou D., Goldsmith R. H., Gust D., Howarth O. W., Inganaes O., Khushabu Thakur, Kira A., Klauk H., Kochi J. K., Lambert C., Le Magueres P., Lewis L. C., Li Z. H., MacDiarmid A. G., Masnovi J. M., Modjewski M. J., Morisaki Y., Navale T. S., Nelsen S. F., Perepichka I. I., Rajendra Rathore, Randic̀ M., Rathore R., Rathore R., Rathore R., Rathore R., Rathore R., Rathore R., Rathore R., Rathore R., Rathore R., Rodgers M. A. J., Roncali J., Ruchi Shukla, S. Sankararaman S., Scherf U., Sergey V. Lindeman, Shirakawa H., Shriya H. Wadumethrige, Shukla R., Shukla R., Stevenson C. D., Sullivan P. A., Tushar S. Navale, Van Hutten P. F., Vijay S. Vyas, Vura-Weis J., Wartini A. R., Wasielewski M. R., Weiss E. A., Zade S. S., Zyss J.   +68 more
core   +2 more sources

Bridging Psychological Stress and Skin Cellular Aging: Flavonoids as a Dual‐Action Therapeutic Strategy

Phytotherapy Research, EarlyView.
ABSTRACT Psychological stress (or simply “stress”) is a major contributor to chronic disease worldwide, affecting 35% of the global population, including younger generations. Furthermore, it plays a significant role in human premature aging; hence, its detrimental effects on people's health compel us to comprehend and control the ways in which ...
Marco Duarte, Sílvia Santos Pedrosa, P. Raaj Khusial, Ana Raquel Madureira   +3 more
wiley   +1 more source

rac-2-{3-[1-(Acetyloxy)ethyl]-2,2-dimethylcyclobutyl}acetic acid

IUCrData
The title compound, C12H20O4, was prepared from α-pinene in three steps. The ester and acid moieties are cis on the slightly folded cyclobutane ring. In the crystal, carboxylic acid bound dimers form layers parallel to (202).
Dieter Schollmeyer, Paul Jirsch, Heiner Detert   +2 more
doaj   +1 more source

Enantioselective Total Synthesis of (+)-Psiguadial B [PDF]

, 2016
The first enantioselective total synthesis of the cytotoxic natural product (+)-psiguadial B is reported. Key features of the synthesis include (1) the enantioselective preparation of a key cyclobutane intermediate by a tandem Wolff rearrangement ...
Beck, Jordan C., Chapman, Lauren M., Reisman, Sarah E., Wu, Linglin   +3 more
core   +3 more sources

Therapeutic effect of NEO400, perillyl alcohol conjugated to linoleic acid, in a mouse model of UV‐induced skin damage

Photochemistry and Photobiology, Volume 101, Issue 2, Page 338-349, March/April 2025.
In the present work with mouse models, we demonstrate that a novel compound, NEO400, is able to profoundly protect skin against damage caused by UV radiation (UVR) when it is applied to skin post‐UVR exposure. In comparison, Aloe vera or linoleic acid are unable to achieve a similar level of protection.
Stephen Swenson, Catalina Silva‐Hirschberg, Liliana Freeland, Kristen L. Chen, Nagore I. Marín‐Ramos, Axel H. Schönthal, Thomas C. Chen   +6 more
wiley   +1 more source