Results 91 to 100 of about 12,404 (251)

Cover Feature: Synthesis of 1,2,5‐Oxadiazinane Derivatives by Photochemical Cycloaddition of Nitrones with Diaminomethanes (ChemPhotoChem 6/2020) [PDF]

open access: bronze, 2020
Kennosuke Itoh   +14 more
openalex   +1 more source

Cycloaddition and Annulation Reactions with Donor‐Acceptor Cyclobutanes

open access: yesHelvetica Chimica Acta, Volume 108, Issue 11, November 2025.
Reviewing the rise of donor‐acceptor cyclobutanes in (4 + 2) annulations, from Lewis/Brønsted acid to electrocatalysis, enabling stereoselective access to complex heterocycles and natural products. Abstract Donor‐acceptor (DA) cyclobutanes are emerging as valuable synthetic intermediates due to their ring strain and polarized C─C bonds, which allow for
Emma G. L. Robert, Jerome Waser
wiley   +1 more source

Synthesis of tetrafluorinated piperidines from nitrones via a visible-light-promoted annelation reaction

open access: yesBeilstein Journal of Organic Chemistry, 2020
A method for the one-step construction of 3,3,4,4-tetrafluorinated piperidines from nitrones and readily accessible tetrafluorinated iodobromobutane is described.
Vyacheslav I. Supranovich   +2 more
doaj   +1 more source

Direct introduction of nitrogen and oxygen functionality with spatial control using copper catalysis. [PDF]

open access: yes, 2018
Synthetic chemists have spent considerable effort optimizing the synthesis of nitrogen and oxygen containing compounds through a number of methods; however, direct introduction of N- and O-functionality remains challenging.
Fisher, David J   +4 more
core  

5,6-Dihydro-2H-pyran-3(4H)-on als Baustein zur Synthese pyrananellierter Heterocyclen [PDF]

open access: yes, 1984
Während 5,6-Dihydro-2H-pyran-3(4H)-on (3) sich mit ortho-substituierten Phenylcarbonylverbindungen nur in Einzelfällen regioselektiv zu pyrananellierten Heterocyclen umsetzt - z. B.
Eiden, Fritz, Wanner, Klaus Th.
core   +1 more source

Discovery of a Potent α ‑ Galactosidase Inhibitor by in Situ Analysis of a Library of Pyrrolizidine − (Thio)urea Hybrid Molecules Generated via Click Chemistry [PDF]

open access: yes, 2018
The parallel synthesis of a 26-membered-library of aromatic/aliphatic-(thio)urea-linked pyrrolizidines followed by in situ biological evaluation toward α -galactosidases has been carried out.
Carmona Asenjo, Ana Teresa   +8 more
core   +1 more source

Synthesis of 4‐Phosphinylpyrrolidin‐3‐ones via [3+2] Cycloaddition of Nitrones with Phosphinylallenes [PDF]

open access: hybrid, 2023
Rayhane Hammami   +6 more
openalex   +1 more source

BET & ELF Quantum Topological Analysis of Neutral 2-Aza-Cope Rearrangement of γ-Alkenyl Nitrones

open access: yesMolecules, 2017
The 2-Aza-Cope rearrangement of γ-alkenyl nitrones is a rare example of the neutral thermal 2-aza-Cope process that usually takes place with cationic species.
Pedro Merino   +3 more
doaj   +1 more source

Florida International University Magazine Fall 1996 [PDF]

open access: yes, 1994
Florida International University Magazine Fall 1996 Volume III, Number 1.
Florida International University Division of University Relations,
core  

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