Results 41 to 50 of about 2,936 (205)

Cyclization and annulation reactions of nitrogen-substituted cyclopropanes and cyclobutanes [PDF]

Cyclization and annulation reactions initiated by ring-opening of small rings, especially cyclopropanes and cyclobutanes are now well-established in synthetic chemistry.
De Nanteuil, F., De Simone, F., Benfatti, F., Waser, J., Serrano, E., Frei, R.   +5 more
core   +1 more source

BODIPY-Labeled Cyclobutanes by Secondary C(sp3)−H Arylations for Live-Cell Imaging [PDF]

, 2019
Arylated cyclobutanes were accessed by a versatile palladium-catalyzed secondary C(sp3)−H activation, exploiting chelation assistance by modular triazoles.
Zanoni G., Wang W., Vendrell M., Virelli M., Wu J., Fernandez A., Scott J., Ackermann L., Kuniyil R.   +8 more
core   +2 more sources

Silylium-Catalyzed Activation of Donor- Acceptor Strained Rings and Annulation with Indoles

CHIMIA
Leveraging the unique reactivity profile of donor-acceptor aminocyclopropanes and cyclobutanes allows the preparation of complex nitrogen-substituted molecules. While most reports focus on donor-acceptor strained rings with two geminal carbonyl groups as
Emma G. L. Robert, Jérôme Waser
doaj   +1 more source

Methyl on the Bridge: 2‐Methyl Propellane as Precursor for 1,3‐Substituted 2‐Methylated Bicyclo[1.1.1]Pentanes

Chemistry – A European Journal, EarlyView.
The synthesis of 2‐methyl propellane and its conversion to various 1,2‐ and 1,2,3‐di‐ and trisubstituted bicyclopentanes is reported. Abstract Bicyclo[1.1.1]pentanes (BCPs) have emerged as isosteric replacements for mono‐ and para‐substituted benzene rings in medicinal and materials applications, involving substitution at the BCP bridgehead (1,3 ...
Sean R. Verschaeve, Mariana Gomes Manso, Tibo Van Eeckhoorn, Mark E. Light, Bruno Linclau   +4 more
wiley   +1 more source

N‐Aryl Acridone Derivatives as Effective Catalysts for Energy Transfer Reactions

Chemistry – A European Journal, EarlyView.
Acridones derivatives have high triplet energy, are simple accessible, and could be used in challenging [2+2] ENT reactions. ABSTRACT Organic photocatalysts capable of promoting high‐energy triplet energy transfer (EnT) remain limited, particularly for demanding [2+2] photocycloaddition reactions.
Francesco Calogero, Gaetano D'Onghia, Federica Fina, Zakaria Ziani, Luca Sensoli, Andrea Gualandi, Andrea Fermi, Paola Ceroni, Pier Giorgio Cozzi   +8 more
wiley   +1 more source

Synthesis of Cyclobutane Serine Analogues

The Journal of Organic Chemistry, 2004
In this paper, we describe a thermal [2 + 2] cycloaddition involving 2-acylaminoacrylates as electron-poor acceptor alkenes, a reaction that involves a Michael-Dieckmann-type process. The reaction gives rise to a new substituted cyclobutane skeleton that can be transformed into amino acid derivatives.
Avenoza, A., Busto, J.H., Canal, N., Peregrina, J.M.   +3 more
openaire   +4 more sources

Catalytic Hypervalent Iodine Promoters Lead to Styrene Dimerization and the Formation of Tri- and Tetrasubstituted Cyclobutanes

, 2016
We report that the use of catalytic quantities of hypervalent iodine reagents (PIDA or Dess Martin Periodinane) allows the rapid and stereoselective formation of cyclobutanes under very mild conditions.
Rosimeire Coura Barcelos, Coura Barcelos, Rosimeire, Colomer, Ignacio, Timothy J. Donohoe, Donohoe, Timothy, Ignacio Colomer   +5 more
core   +1 more source

Clathrate hydrate crystallization

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract Clathrate hydrate crystallization has been an area of interest to chemical engineers from the point of view of crystal structure, thermophysical properties, phase equilibria, kinetics, industrial applications, and environmental (climate change) implications.
Peter Englezos
wiley   +1 more source

Development of contractive synthesis of cyclobutanes from pyrrolidines [PDF]

, 2021
Carbocycles are omnipresence in chemical pharmaceuticals, biologically active natural products and organic functional materials. Construction of structurally intriguing, highly functionalized small carbocycles with congested stereocenters remain to be an
Hui, Chun-Ngai
core   +1 more source

Diverse reactivity of maleimides in polymer science and beyond

Polymer International, Volume 74, Issue 4, Page 296-306, April 2025.
This mini‐review provides a thorough overview of maleimide chemistry, highlighting its diverse reactivity in polymer and materials science applications. Abstract Maleimides are remarkably versatile functional groups, capable of participating in homo‐ and copolymerizations, Diels–Alder and (photo)cycloadditions, Michael additions, and other reactions ...
Bruce E Kirkpatrick, Kristi S Anseth, Tayler S Hebner   +2 more
wiley   +1 more source