Results 81 to 90 of about 8,948 (229)

The Impact of Chemical Modifications on the Photochromism of Spiropyran: A Roadmap to Navigate Powerful Photochromes

ChemPhotoChem, Volume 10, Issue 4, April 2026.
This review summarizes how even minor chemical modifications can be used to shape spiropyran photochromism. We highlight how substituents, strain, and heteroatoms tune absorption, stability, switching efficiency, and overall photochromic behaviour.
Gianni Pacella, Giuseppe Portale
wiley   +1 more source

Iminoéthers-1 3 cycliques : chimie et applications dans le domaine des additifs pétroliers et des matériaux organiques Cyclic 1,3-Iminoethers: Chemistry and Applications in the Field of Petroleum Additives and Organic Materials

Oil & Gas Science and Technology, 2006
Cet article est consacré aux iminoéthers-1,3 cycliques les plus courants : les oxazines-1,3 et oxazolines-1,3. La première partie rappelle les synthèses de ces composés et quelques aspects récents de leur chimie : réactions d'hydrolyse, réactions de ...
Le Perchec P., Sillion B., Salle R.
doaj   +1 more source

One-Pot Metal-Free Synthesis of 3-CF₃-1,3-Oxazinopyridines by Reaction of Pyridines with CF₃CO-Acetylenes

Molecules, 2019
The reaction of pyridines with trifluoroacetylated acetylenes was investigated. It was found that the reaction of various pyridines with two molecules of CF3CO-acetylenes proceeds under mild metal-free conditions.
Vasiliy M. Muzalevskiy, Zoia A. Sizova, Kseniya V. Belyaeva, Boris A. Trofimov, Valentine G. Nenajdenko   +4 more
doaj   +1 more source

Identification of Novel Class of Triazolo-Thiadiazoles as Potent Inhibitors of Human Heparanase and their Anticancer Activity

BMC Cancer, 2017
Background Expression and activity of heparanase, an endoglycosidase that cleaves heparan sulfate (HS) side chains of proteoglycans, is associated with progression and poor prognosis of many cancers which makes it an attractive drug target in cancer ...
C. P. Baburajeev, Chakrabhavi Dhananjaya Mohan, Shobith Rangappa, Daniel J. Mason, Julian E. Fuchs, Andreas Bender, Uri Barash, Israel Vlodavsky, Basappa, Kanchugarakoppal S. Rangappa   +9 more
doaj   +1 more source

Synthesis of enantiomerically pure helicene like bis-oxazines from atropisomeric 7,7’-dihydroxy BINOL: Preliminary measurements of the circularly polarized luminescence

Tetrahedron Letters, 2014
Racemic sample of 2,2’,7,7’-tetrahydroxy-1,1’-binaphthyl was resolved with (S)-proline and the separated enantiomers were independently converted to atropisomeric bis-oxazines by aromatic Mannich reaction. These chirally pure oxazines were then converted
M. S. Sundar, Harish R. Talele, H. Mande, A. Bedekar, Roberto C. Tovar, G. Muller   +5 more
semanticscholar   +1 more source

Synthesis of rigid p-terphenyl-linked carbohydrate mimetics

Beilstein Journal of Organic Chemistry, 2014
An approach to β-D-2-aminotalose- and β-D-2-aminoidose-configured carbohydrate mimetics bearing a phenyl substituent is described. Unnatural divalent rigid p-terphenyl-linked C-aryl glycosides with 2.0 nm dimension are available using Suzuki cross ...
Maja Kandziora, Hans-Ulrich Reissig
doaj   +1 more source

Synthesis of new enantiopure poly(hydroxy)aminooxepanes as building blocks for multivalent carbohydrate mimetics

Beilstein Journal of Organic Chemistry, 2014
New compounds with carbohydrate-similar structure (carbohydrate mimetics) are presented in this article. Starting from enantiopure nitrones and lithiated TMSE-allene we prepared three 1,2-oxazine derivatives which underwent a highly stereoselective Lewis
Léa Bouché, Maja Kandziora, Hans-Ulrich Reissig   +2 more
doaj   +1 more source

Exploring the electronic structure and binding affinity of 3-(4-fluorophenyl)-3,4-dihydro-2H-naphtho[2,3-e][1,3]oxazine-5,10-dione through DFT and molecular docking

Discover Chemistry
This work presents a computational study of GK-1, a naphthoquinone–oxazine scaffold, spanning electronic structure, spectroscopy, nonlinear-optical (NLO) response, and in-silico protein recognition.
Megha Munjal, Garima Khanna, Sonam Nirwan   +2 more
doaj   +1 more source

Synthesis and Biological Activity Evaluation In Silico of Bis(4-Hydroxy-6H-1,3-Oxazin-6-One) Derivatives and the Products of Their Alcoholysis

Chemistry Proceedings
Introduction: According to research data, 1,3-oxazines are pharmacologically active substances, as well as the substrates for the synthesis of heterocyclic and acyclic compounds.
Anastasia Andreevna Varvarkina, Denis Andreevich Kolesnik, Marina Pavlovna Novikova, Igor Pavlovich Yakovlev, Polina Olegovna Levshukova   +4 more
doaj   +1 more source

Gold(i)-catalyzed 6-endo-dig azide-yne cyclization: efficient access to 2H-1,3-oxazines.

Chemical Communications, 2017
G. Lonca, Ciputra Tejo, H. Chan, S. Chiba, F. Gagosz   +4 more
semanticscholar   +1 more source