Results 51 to 60 of about 1,032 (168)
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. +3 more
openaire +4 more sources
Stereoselective polar radical crossover for the functionalization of strained-ring systems
Communications ChemistryRadical-polar crossover of organoborates is a poweful tool that enables the creation of two C-C bonds simultaneously. Small ring systems have become essential motifs in drug discovery and medicinal chemistry.
Florian Trauner +4 more
doaj +1 more source
PhotochemThe [2+2]-photocycloaddition of 2-acetoxy-1,4-naphthoquinone with 1,1-diphenylethylene, styrene and cyclopentene was conducted in a conventional batch reactor.
Madyan A. Yaseen +3 more
doaj +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
Cycloaddition and Annulation Reactions with Donor‐Acceptor Cyclobutanes [PDF]
Donor‐acceptor (DA) cyclobutanes are emerging as valuable synthetic intermediates due to their ring strain and polarized C─C bonds, which allow for 1,4‐dipolar reactions.
Waser, Jérôme, Robert, Emma G. L.
core +1 more source
MolbankThe cyclobutane ring has attractive properties as a scaffold in medicinal chemistry but is underused, potentially due to the limited methods available for synthesising highly functionalised cyclobutanes. This short note describes the synthesis of the 1,3-
Helen M. Sheldrake
doaj +1 more source
Synthetic Strategies for the Construction of Cyclobutane‐Fused Heterocycles
European Journal of Organic Chemistry, EarlyView.Cyclobutane‐fused heterocycles are important motifs commonly present in bioactive compounds, recognized for their rigid 3D structures that confer unique properties. However, synthesizing these compounds remains challenging. This review discusses current methods for their synthesis, such as photochemical, metal‐catalyzed, and Lewis acid‐mediated [2 + 2]
Michela Vargiu +2 more
wiley +1 more source
, 2019 Donor–acceptor (D–A) cyclobutanes with two geminal ester groups as acceptors are reacted with electron-rich arenes as nucleophiles to afford ring-opened products. AlCl3 mediates this Friedel–Crafts-type reaction.
Daniel B. Werz (1393828) +3 more
core +1 more source
Nucleophilic Reactions of Cyclobutenones and the Related 4,4‐Dichlorocyclobutenone Derivatives
European Journal of Organic Chemistry, EarlyView.Cyclobutenone derivates and their 4,4‐dichloro counterparts have an uninterrupted attention as useful synthons in the synthesis of complex organic molecules. Their nucleophilic reactions remain underexplored. This review brings attention to these reactions, whose outcome is not straightforward.
Sarah J. Wright +2 more
wiley +1 more source
Digital Printing of Photoreversible Protective Films
Macromolecular Rapid Communications, EarlyView.A photopolymerized and photoreversible temporary protective film based on an ortho‐nitrobenzyl crosslinker is presented that can be applied using aerosol jet printing. To improve adhesion to industry‐relevant surfaces, a polyethyleneimine‐based adhesion promoter was added to the aqueous formulation of diacrylate cross‐linker and acrylated macromers ...
Morris Wolf +5 more
wiley +1 more source