Results 71 to 80 of about 14,856 (220)

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

Depth of DNA photodamage in human corneas exposed to 222 nm or 254 nm UV

Photochemistry and Photobiology, EarlyView.
Representative confocal 3D image of a section of a human cornea showing nuclei in blue (Hoechst 33342) and green, which was assigned to cells exhibiting Alexa555 conjugated to anti‐CPD antibody. The depth of photodamage was measured in Z‐stacks of the human corneal epithelium after exposure of the anterior surface to 50 or 100 mJ/cm2 at 222 or 254 nm ...
Manuela Buonanno, Istvan R. Boldogh, Raabia Hashmi, Camryn Petersen, David Welch, Theresa C. Swayne, David J. Brenner   +6 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

Two New Cyclobutane Dimers from

Natural Product Communications, 2017
A biochemical and phytochemical study of Diospyros macrocarpa Hiern, an endemic plant of New Caledonia, was realized. Indeed, bark and leaf extracts were tested for their cytotoxic and antibiotic activities as well as for their radical scavenging ...
Charlotte Thieury, Rémy Le Guével, Gaëtan Herbette, Valérie Monnier, Nicolas Lebouvier, Edouard Hnawia, Yoshinori Asakawa, Thierry Guillaudeux, Mohammed Nour   +8 more
doaj   +1 more source

Development of chalcones structure‐related to avobenzone: Photoprotection, photostability, and safety evaluation

Photochemistry and Photobiology, EarlyView.
Scaffold hopping strategy used to develop chalcones structure‐related to the avobenzone tautomer. Positive aspects of 2‐hydroxychalcones are highlighted. Abstract Chalcones are α,β‐unsaturated ketones with extended π‐conjugation, making them promising scaffolds for the development of organic UV filters.
Gabriela Zanella Marcon, Taíne de Bastos Brum, Nayara Fernanda Tokashike de Araujo, Gabriela Lascala Ramos, Bruna Cogo Borin, Ruth Barin, Aline Ferreira Ourique, André Passaglia Schuch, Andréa Inês Horn Adams, Lorena Rigo Gaspar Cordeiro, Letícia Cruz, Fernando Fumagalli   +11 more
wiley   +1 more source

Synthesis of syn- and anti-1-Amino-3-[¹⁸F]fluoromethyl-cyclobutane-1-carboxylic Acid (FMACBC), Potential PET Ligands for Tumor Detection

, 2016
syn- and anti-1-Amino-3-[18F]fluoromethyl-cyclobutane-1-carboxylic acid (FMACBC, 16 and 17), analogues of anti-1-amino-3-[18F]fluorocyclobutyl-1-carboxylic acid (FACBC), were prepared to evaluate the contributions of C-3 substitution and configuration on
Geoffrey D. Bowers (3012897), Nicholas E. Simpson (796095), Mark M. Goodman (173923), Chiab P. Simpson (3012900), Laurent Martarello (2665186), Eugene J. Malveaux (2400850), Jonathan McConathy (470756), Vernon M. Camp (2264221), Jeffrey J. Olson (246395)   +8 more
core   +1 more source

Cage-confined photocatalysis for wide-scope unusually selective [2 + 2] cycloaddition through visible-light triplet sensitization

Nature Communications, 2020
Light-induced [2 + 2] cycloaddition is the most efficient way to generate cyclobutanes, while suffering from limitations of specific selectivity.
Jing-Si Wang, Kai Wu, Changzhen Yin, Kang Li, Yahao Huang, Jia Ruan, Ximin Feng, Peng Hu, Cheng-Yong Su   +8 more
doaj   +1 more source

Conformational Studies of Cyclobutane Systems

, 1963
Isolated attempts have been made to detect the presence of nonplanarity in cyclobutane rings. Significant deviations from planarity have been measured for cyclobutane, octafluorocyclobutane, octachlorocyclobutane and bromocyclobutane. The results in the
Roberts, John D., Lambert, Joseph B.
core  

Mechanochemistry of cyclobutanes

Science China Chemistry
AbstractThe field of polymer mechanochemistry has been revolutionized by implementing force-responsive functional groups—mechanophores. The rational design of mechanophores enables the controlled use of force to achieve constructive molecular reactivity and material responses.
Roberto Obregon, Junpeng Wang
openaire   +1 more source

ON THE RING-PUCKERING ISOTOPE EFFECT IN CYCLOBUTANE AND CYCLOBUTANE-$ d_{8} $

, 1973
Author Institution: Department of Physics and Department of Chemistry Mississippi State, University Mississippi StateThe ring-puckering data on cyclobutane and cyclobutane-$d_{8}$ have been reexamined including the coordinate dependence of the reduced ...
Malloy, Thomas B., Jr.
core   +1 more source