Results 11 to 20 of about 1,721 (198)

3-Amino-2H-azirine, Moleküle mit vielfältigen Reaktionsmöglichkeiten [PDF]

CHIMIA, 1979
3-Amino-2H-azirines, cyclic three-membered amidines with an estimated ring strain of about 200 kJ/mole, undergo a variety of reactions. Thereby, each of the azirine bonds can be broken: Thermolysis leads to the rupture of the C(2),C(3)-bond, with strong
Heinz Heimgartner
doaj   +3 more sources

Diastereoselective ZnCl₂-Mediated Joullié–Ugi Three-Component Reaction for the Preparation of Phosphorylated N-Acylaziridines from 2H-Azirines [PDF]

Molecules
We disclose a direct approach to the diastereoselective synthesis of phosphorus substituted N-acylaziridines based on a one-pot ZnCl2-catalyzed Joullié–Ugi three-component reaction of phosphorylated 2H-azirines, carboxylic acids and isocyanides.
Julene Allende, Iurre Olaizola, Ana M. Ochoa de Retana, Francisco Palacios, Jesús M. de los Santos   +4 more
doaj   +2 more sources

2H-Azirines as electrophiles [PDF]

, 2011
2H-Azirines have shown an unusual potential to synthesise aziridines and other types of compounds. Many functionalized aziridines can be produced by addition of O-, S-,N-, C-nucleophiles and hydride to 2H-azirines. This review is designed to give an overview of the reactivity of 2H-azirines as electrophiles along the years and their usefulness in the ...
Alves, M. José, Costa, Flora Teixeira e
openaire   +3 more sources

Isomerization of 5-(2H-Azirin-2-yl)oxazoles: An Atom-Economic Approach to 4H-Pyrrolo[2,3-d]oxazoles

Molecules, 2021
An atom economical method for the preparation of variously substituted 4H-pyrrolo[2,3-d]oxazoles was developed on the basis of thermal isomerization of 5-(2H-azirin-2-yl)oxazoles.
Timur O. Zanakhov, Ekaterina E. Galenko, Mariya A. Kryukova, Mikhail S. Novikov, Alexander A. Khlebnikov   +4 more
doaj   +1 more source

Polymerization-Induced Direct Photolithography of Quantum Dots. [PDF]

Macromol Rapid Commun
We present a comprehensive overview of photochemical polymerization strategies for direct lithographic patterning of colloidal quantum dots (QDs). Reaction mechanisms are categorized by functional group type, and their application is discussed in terms of pattern fidelity, photostability, and environmental robustness, highlighting the potential of ...
Kim T, Gwak N, Oh N, Kim TA.
europepmc   +2 more sources

2H-Azirines as dipolarophiles [PDF]

Tetrahedron Letters, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
Melo, Teresa M. V. D. Pinho e, Cardoso, Ana L., Gomes, Clara S. B., Gonsalves, António M. d'A. Rocha   +3 more
openaire   +2 more sources

Synthesis and Application of Bioactive N-Functionalized Aziridines. [PDF]

Angew Chem Int Ed Engl
This review discusses modern synthetic methods for the preparation of aziridine‐containing small molecules, including biocatalytic, electrocatalytic, and photocatalytic strategies. We highlight the compatibility of various synthetic methods with control of the exocyclic N‐substituent.
Tan H, Samanta S, Qiu N, Adibekian A, Powers DC.   +4 more
europepmc   +3 more sources

Non-Aziridination Approaches to 3-Arylaziridine-2-carboxylic Acid Derivatives and 3-Aryl-(aziridin-2-yl)ketones. [PDF]

Int J Mol Sci, 2022
Funding Information: APC was covered by Riga Stradins University, Riga, Latvia. Publisher Copyright: © 2022 by the authors. Licensee MDPI, Basel, Switzerland.Highly functionalized aziridines, including compounds with aromatic moieties, are attractive ...
Strumfs B, Velikijs K, Uljanovs R, Sinkarevs S, Strumfa I.   +4 more
europepmc   +3 more sources

Synthesis of α-Aminophosphonic Acid Derivatives Through the Addition of O- and S-Nucleophiles to 2H-Azirines and Their Antiproliferative Effect on A549 Human Lung Adenocarcinoma Cells

Molecules, 2020
This work reports a straightforward regioselective synthetic methodology to prepare α-aminophosphine oxides and phosphonates through the addition of oxygen and sulfur nucleophiles to the C–N double bond of 2H-azirine derivatives. Determined by the nature
Victor Carramiñana, Ana M. Ochoa de Retana, Francisco Palacios, Jesús M. de los Santos   +3 more
doaj   +1 more source

Synthesis of Siphonazole B Through Domino Cycloisomerization-Oxazolonium Ion Rearrangements. [PDF]

Chemistry
The study by Strand and co‐workers describes a concise synthesis of siphonazole B. Both oxazole units are formed from a simple propargylamine using a novel domino cycloisomerization‐rearrangement approach. Additional synthetic features include a direct aldol‐type reaction for assembling the tricyclic siphonazole core and an oxidative amidation reaction
Paulsen F, Clementson S, von Wachenfeldt H, Antoszczak M, Fridolf S, Strand D.   +5 more
europepmc   +2 more sources