Results 1 to 10 of about 8,043 (225)

Mechanistic DFT Study of 1,3-Dipolar Cycloadditions of Azides with Guanidine. [PDF]

open access: yesMolecules, 2023
Density functional calculations SMD(chloroform)//B3LYP/6-311+G(2d,p) were employed in the computational study of 1,3-dipolar cycloadditions of azides with guanidine.
Antol I, Glasovac Z, Margetić D.
europepmc   +2 more sources

Intramolecular Azide to Alkene Cycloadditions for the Construction of Pyrrolobenzodiazepines and Azetidino-Benzodiazepines [PDF]

open access: yesMolecules, 2014
The coupling of proline- and azetidinone-substituted alkenes to 2-azidobenzoic and 2-azidobenzenesulfonic acid gives precursors that undergo intramolecular azide to alkene 1,3-dipolar cycloadditions to give imine-, triazoline- or aziridine-containing ...
Antonow   +9 more
core   +4 more sources

Dynamic Catalytic Highly Enantioselective 1,3-Dipolar Cycloadditions. [PDF]

open access: yesAngew Chem Int Ed Engl, 2021
AbstractIn dynamic covalent chemistry, reactions follow a thermodynamically controlled pathway through equilibria. Reversible covalent‐bond formation and breaking in a dynamic process enables the interconversion of products formed under kinetic control to thermodynamically more stable isomers.
Yildirim O   +5 more
europepmc   +9 more sources

Green Protocols in Heterocycle Syntheses via 1,3-Dipolar Cycloadditions. [PDF]

open access: yesFront Chem, 2019
The aim of this review is to provide an overview of green protocols for the organic synthesis of heterocycles via 1,3-dipolar cycloaddition. Particular attention has been devoted to the use of green solvents; reactions performed in ionic liquids ...
Martina K   +3 more
europepmc   +2 more sources

Understanding the 1,3-Dipolar Cycloadditions of Allenes. [PDF]

open access: yesChemistry, 2020
AbstractWe have quantum chemically studied the reactivity, site‐, and regioselectivity of the 1,3‐dipolar cycloaddition between methyl azide and various allenes, including the archetypal allene propadiene, heteroallenes, and cyclic allenes, by using density functional theory (DFT).
Yu S   +4 more
europepmc   +6 more sources

Asymmetric 1,3-dipolar cycloadditions of acrylamides [PDF]

open access: yesChem. Soc. Rev., 2009
This critical review, which is relevant to researchers in synthetic organic chemistry, focuses on asymmetric 1,3-dipolar cycloadditions with acrylamides.
Kissane, Marie, Maguire, Anita R.
core   +3 more sources

Triazol-substituted titanocenes by strain-driven 1,3-dipolar cycloadditions. [PDF]

open access: yesBeilstein J Org Chem, 2014
An operationally simple, convenient, and mild strategy for the synthesis of triazole-substituted titanocenes via strain-driven 1,3-dipolar cycloadditions between azide-functionalized titanocenes and cyclooctyne has been developed.
Gansäuer A   +5 more
europepmc   +2 more sources

Decarboxylation-Driven Double Annulations: Innovative Multi-Component Reaction Pathways. [PDF]

open access: yesMolecules
A concerted five-component reaction strategy has been developed, featuring double [3+2] cycloadditions utilizing aspartic acid. This approach provides valuable insights into mechanistic pathways, allowing for the distinction between concerted and ...
Zhan D   +4 more
europepmc   +2 more sources

1,3-Dipolar cycloadditions of azomethine imines [PDF]

open access: yesOrganic & Biomolecular Chemistry, 2015
Azomethine imines are considered 1,3-dipoles of the aza-allyl type which are transient intermediates and should be generated in situ but can also be stable and isolable compounds.
Nájera, Carmen   +2 more
core   +6 more sources

Activation of Dinitrogen as A Dipolarophile in 1,3-Dipolar Cycloadditions: A Theoretical Study Using Nitrile Imines as "Octet" 1,3-Dipoles. [PDF]

open access: yesSci Rep, 2017
Theoretical calculations at the G4MP2 level of theory demonstrate that it is possible to activate dinitrogen to make it react in dipolar cycloadditions using neutral beryllium derivatives and other neutral metallic compounds.
Montero-Campillo MM   +2 more
europepmc   +2 more sources

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