Results 101 to 110 of about 21,735 (237)

Isoxazolium N-ylides and 1-oxa-5-azahexa-1,3,5-trienes on the way from isoxazoles to 2H-1,3-oxazines

Beilstein Journal of Organic Chemistry, 2014
Theoretical and experimental studies of the reaction of isoxazoles with diazo compounds show that the formation of 2H-1,3-oxazines proceeds via the formation of (3Z)-1-oxa-5-azahexa-1,3,5-trienes which undergo a 6π-cyclization.
Alexander F. Khlebnikov, Mikhail S. Novikov, Yelizaveta G. Gorbunova, Ekaterina E. Galenko, Kirill I. Mikhailov, Viktoriia V. Pakalnis, Margarita S. Avdontceva   +6 more
doaj   +1 more source

Progress towards the synthesis of tetracyclic heteroaromatic compounds via tandem benzannulation-cyclization strategies [PDF]

, 2012
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Chemistry, February 2012.Cataloged from PDF version of thesis.Includes bibliographical references.A tandem benzannulation-cyclization strategy was successfully applied to the synthesis of a ...
Mamaliga, Galina
core  

Thienylpyrrole azo dyes: synthesis, solvatochromic and electrochemical properties [PDF]

, 2005
The synthesis and the evaluation of solvatochromic and electrochemical properties of new donor-acceptor-substituted thienylpyrrole azo dyes 3 are described.
Fonseca, A. Maurício C., Kirsch, G., Raposo, M. Manuela M., Sousa, Ana M. R. C.   +3 more
core   +1 more source

Dimethyl‐, Diethyl‐, and Propylene Carbonates: An Emerging Class of Green Solvents for Organic Synthesis

The Chemical Record, EarlyView.
This review highlights recent advances in the use of organic carbonates, dimethyl carbonate (DMC), diethyl carbonate (DEC), and propylene carbonate (PC), as solvents in organic synthesis. Based on over seventy studies from the past 6 years, it shows their application in different organic reaction types, emphasizing their role in safer and more ...
Gabriela T. Quadros, Livia C. L. Valente, Thiago Barcellos, Daniela Hartwig, Laura Abenante, Eder J. Lenardão   +5 more
wiley   +1 more source

Photoinduced Selective Construction of Densely Functionalized Spirocyclic Ethers With Carbyne Equivalents

Angewandte Chemie, Volume 138, Issue 18, 27 April 2026.
A reactivity programmed cascade between carbyne equivalents and allylic benzoates was developed that sequentially orchestrates all three reactivity modes of carbyne equivalents, enabling the rapid installation of three σ‐bonds at a single carbon center and providing efficient, scalable access to structurally diverse spirocyclic ethers. ABSTRACT Carbyne
Jianke Su, Chu Wang, Zhongping Cai, Jiale Wu, Xu Yan Chen, Jie Wu   +5 more
wiley   +2 more sources

Site Selectivity in Pd-Catalyzed Reactions of α-Diazo-α-(methoxycarbonyl)acetamides: Effects of Catalysts and Substrate Substitution in the Synthesis of Oxindoles and β-Lactams

Molecules, 2019
The Pd-catalyzed intramolecular carbene C−H insertion of α-diazo-α-(methoxycarbonyl)acetamides to prepare oxindoles as well as β-lactams was studied.
Daniel Solé, Ferran Pérez-Janer, Arianna Amenta, M.-Lluïsa Bennasar, Israel Fernández   +4 more
doaj   +1 more source

Comprehensive Evaluation of Bisphenol A Toxicity Reveals Neurobehavioral, Metabolic, and Reproductive Impairments in Girardia tigrina

Environmental Toxicology, EarlyView.
ABSTRACT Bisphenol A (BPA), a common industrial chemical used in plastics and consumer products, is increasingly detected in aquatic environments, raising serious concerns about its potential ecological impacts. This study evaluated the sublethal and acute toxic effects of BPA on the freshwater planarian Girardia tigrina, a recognized model for ...
Raquel de Jesus Selestrino, Felipe Schaly, Welligton Luciano Braguini   +2 more
wiley   +1 more source

Bis(silylene)‐Mediated N═N Bond Scission of Diazo Compounds

Angewandte Chemie, Volume 138, Issue 18, 27 April 2026.
The carborane‐based bis(silylene) enables unprecedented N═N bond scission in diazodiarylmethanes. While xanthene‐ and aniline‐based scaffolds promote end‐on addition with partial N═N activation, the carborane‐based variant uniquely achieves complete N═N bond scission of Ar2C═N═N compounds, resulting in isolable disilicon nitride imino species.
Yun Xiong, Shenglai Yao, Matthias Driess
wiley   +2 more sources

Diels–Alder Cycloaddition of N-Azobenzene Maleimides with Furan and Electrochemical Study of Redox Reactions

Reactions
This work reports the synthesis of aminoazobenzene compounds derived from 3,5-dimethylaniline (1a–1f) via a diazo-coupling reaction with aromatic amines.
David Fernando Venegas-Villalvazo, David Abraham Figueroa-Hernández, Armando Pineda-Contreras, José Manuel Flores-Alvarez, Héctor García-Ortega, Juan Saulo González-González   +5 more
doaj   +1 more source

Modulation of KATP channels by diazoxide preserves mitochondrial function and barrier integrity under staurosporine‐induced epithelial stress

British Journal of Pharmacology, EarlyView.
Background and Purpose Intestinal barrier dysfunction caused by mitochondrial stress, oxidative damage and apoptosis, are hallmarks of dysbiosis‐associated gastrointestinal (GI) disorders. Staurosporine causes downstream features of dysbiosis‐induced epithelial damage.
Fatima Maqoud, Eleonora Malerba, Simona Drago, Antonella Orlando, Domenica Mallardi, Nicoletta De Lucia, Marina Antonacci, Annamaria Di Turi, Domenico Tricarico, Francesco Russo   +9 more
wiley   +1 more source