Results 21 to 30 of about 5,649 (226)

N-Aminopyridinium reagents as traceless activating groups in the synthesis of N-Aryl aziridines

Nature Communications, 2022
Aziridines are useful intermediates, present in important synthetic targets. Here, the authors show a strategy for the synthesis of N-aryl aziridines based on N-aminopyridinium reagents followed by Ni-catalyzed C–N cross-coupling of N-pyridinium ...
Hao Tan, Samya Samanta, Asim Maity, Pritam Roychowdhury, David C. Powers   +4 more
doaj   +1 more source

Novel MCM-41 Supported Dicationic Imidazolium Ionic Liquids Catalyzed Greener and Efficient Regioselective Synthesis of 2-Oxazolidinones from Aziridines and Carbon Dioxide

Molecules, 2022
A type of MCM-41 supported dicationic imidazolium ionic liquid nanocatalyst has been synthesized and found to be competent for the synthesis of 2-oxazolidinones through the sustainable chemical conversion of CO2 with aziridines.
Yulin Hu, Lili Yang, Xiaobing Liu
doaj   +1 more source

Asymmetric synthesis of CF2-functionalized aziridines by combined strong Brønsted acid catalysis

Beilstein Journal of Organic Chemistry, 2020
A diastereo- and enantioselective approach to access chiral CF2-functionalized aziridines from difluorodiazoethyl phenyl sulfone (PhSO2CF2CHN2) and in situ-formed aldimines is described.
Xing-Fa Tan, Fa-Guang Zhang, Jun-An Ma
doaj   +1 more source

Pd-Catalyzed Cycloaddition of Bicyclic Aziridine with Isocyanates

Medical Sciences Forum, 2022
Nitrogen-containing heterocycles can have several applications in the pharmaceutical industry since they contain a wide spectrum of biological activities. Imidazolidinones have shown activity against leukemia, lung cancer, and metabolic disorders.
Mariana Crespo Monteiro, Carlos A. M. Afonso, Filipa Siopa   +2 more
doaj   +1 more source

A sustainable strategy for the straightforward preparation of 2H-azirines and highly functionalized NH-aziridines from vinyl azides using a single solvent flow-batch approach

Beilstein Journal of Organic Chemistry, 2021
The reported flow-batch approach enables the easy preparation of 2H-azirines and their stereoselective transformation into highly functionalized NH-aziridines, starting from vinyl azides and organolithium compounds.
Michael Andresini, Leonardo Degannaro, Renzo Luisi   +2 more
doaj   +1 more source

Accessing Rare α-Heterocyclic Aziridines via Brønsted Acid-catalyzed Michael Addition/Annulation: Scope, Limitations, and Mechanism

, 2023
We report an approach to the diastereoselective synthesis of 1,2-disubstituted heterocyclic aziridines. A Brønsted acid-catalyzed conjugate addition of anilines to trisubstituted heterocyclic chloroalkenes provides an intermediate 1,2-chloroamine ...
Aidan, McKay, Allan, Watson, Timothy, Hilton, Andrew, Leach   +3 more
core   +1 more source

Inverse Vulcanization Through Epoxide Chemistry: A Low Temperature Non‐Olefin Route to Sulfur‐Rich Polymer Networks

Angewandte Chemie, EarlyView.
Epoxide monomers undergo base‐catalyzed ring‐opening copolymerization with elemental sulfur to afford sulfur‐rich polymers under mild conditions. The resulting materials exhibit excellent mechanical performance, strong adhesion (up to 10 MPa on stainless steel), and outstanding reprocessability.
Pan Yang, Youfu Wang, Xinyuan Zhu, Jinhong Jia, Xiaofeng Wu, Tom Hasell   +5 more
wiley   +2 more sources

A Mononuclear Ruthenium(V)‐Imido Complex With Hydrogen Bonding in the Second Coordination Sphere Forming Aziridines Without N‐Substituents From Alkenes in Water

Angewandte Chemie, EarlyView.
This study employs a RuV═NH complex with hydrogen‐bonding (HB) sites in the SCS to afford non‐N‐substituted aziridines selectively. Nitrogen‐atom transfer occurs from the RuV═NH complex to alkenes in water to produce aziridine derivatives in high yields.
Tomoya Ishizuka, Chisato Ogawa, Yoshihito Shiota, Shunsuke Nozawa, Hiroaki Kotani, Shin‐ichi Adachi, Kazunari Yoshizawa, Takahiko Kojima   +7 more
wiley   +2 more sources

Recentes avanços na preparação de aziridinas. Aplicações sintéticas e implicações mecanísticas Recent advances in the preparation of aziridines and their application in organic synthesis

Química Nova, 2007
This article surveys a selection of the most recent advances in aziridine synthesis. Novel synthetic methods and new insights into existing methodologies for the selective construction of the title compounds reported in the past decade are discussed in ...
Tula Beck Bisol, Marcus Mandolesi Sá
doaj   +1 more source

TDAE Strategy for the Synthesis of 2,3-Diaryl N-Tosylaziridines

Molecules, 2013
We report herein an original and rapid synthesis of 2,3-diaryl N-tosylaziridines by TDAE strategy starting from ortho- or para-nitro(dichloromethyl)benzene derivatives and N-tosylimines. A mixture of cis/trans isomers was isolated from 1-(dichloromethyl)-
Thierry Terme, Cédric Spitz, Omar Khoumeri, Patrice Vanelle   +3 more
doaj   +1 more source