Results 11 to 20 of about 17,307 (208)

[3+2] Dipolar Cycloaddition of a Stabilized Azomethine Ylide and an Electron-Deficient Dipolarophile: Revision of Regioselectivity. [PDF]

open access: yesJ Org Chem, 2023
The regioselectivity of a [3+2] dipolar cycloaddition reaction of a stabilized azomethine ylide with an electron-deficient dipolarophile was found to be counter to a report published in this ...
Wu KJY, Benedetto AE, Myers AG.
europepmc   +3 more sources

Correction: Covalent organic functionalization of graphene nanosheets and reduced graphene oxide via 1,3-dipolar cycloaddition of azomethine ylide. [PDF]

open access: yesNanoscale Adv, 2021
Correction for ‘Covalent organic functionalization of graphene nanosheets and reduced graphene oxide via 1,3-dipolar cycloaddition of azomethine ylide’ by Luca Basta et al., Nanoscale Adv., 2021, DOI: 10.1039 ...
Basta L   +9 more
europepmc   +2 more sources

Oxazolium salt/azomethine ylide approach to aziridinomitosenes.

open access: yes, 2002
An enantioselective synthesis of aziridinomitosenes and analogs thereof was investigated using an intramolecular oxazolium salt/azomethine ylide cycloaddition sequence to construct the indoloquinone tetracyclic core.
Warner, Don Lewis
core   +6 more sources

Synthesis of diversely substituted bis-pyrrolizidino/ thiopyrrolizidino oxindolo/acenaphthyleno curcuminoids via sequential azomethine ylide cycloaddition. [PDF]

open access: yesRSC Adv, 2018
Curcumin has been transformed to several diversely substituted bis-pyrrolizidino/thiopyrrolizidino oxindolo/acenaphthyleno curcuminoids via a sequential azomethine ylide cycloaddition reaction.
Singh M   +8 more
europepmc   +2 more sources

Approach to the Homoerythrina Alkaloids Using a Tandem N-Alkylation/Azomethine Ylide Cycloaddition

open access: yes, 2016
Synthetic efforts toward the homoerythrina alkaloids 1−3 are described. Two separate model systems guided the pivotal [3 + 2] azomethine ylide cycloaddition cascade to form the A−C rings of these alkaloids.
Jeff W. Kampf (1537393)   +4 more
core   +4 more sources

Kinetic Resolution of Alkylidene Norcamphors via a Ligand-Controlled Umpolung-Type 1,3-Dipolar Cycloaddition

open access: yesiScience, 2019
Summary: Development of a general catalytic and highly efficient method utilizing readily available precursors for the regio- and stereoselective construction of bioactive natural-product-inspired spiro architectures remains a formidable challenge in ...
Chong Shen   +5 more
doaj   +1 more source

Exploring Regio- and Stereoselectivity in [3+2] Cycloaddition: Molecular Electron Density Theory Approach for Novel Spirooxindole-Based Benzimidazole with Pyridine Spacer

open access: yesCrystals, 2023
A new ethylene derivative was synthesized as a precursor for the [3+2] cycloaddition (32CA) reaction to access a novel spirooxindole embodied with benzimidazole with a pyridine spacer.
Saeed Alshahrani   +4 more
doaj   +1 more source

General Approach toward Aspidospermatan-Type Alkaloids Using One-Pot Vilsmeier–Haack Cyclization and Azomethine Ylide Cycloaddition [PDF]

open access: yes, 2017
: The development of a new one-pot reaction sequence afforded the tricyclic core of several aspidospermatan-type alkaloids from a linear, densely functionalized substrate.
Guillaume Bélanger   +3 more
core   +1 more source

[Bmim]Br Accelerated One-Pot Three-Component Cascade Protocol for the Construction of Spirooxindole–Pyrrolidine Heterocyclic Hybrids

open access: yesMolecules, 2020
Our synthetic approach for the assembly of structurally complex spirooxindole heterocyclic hybrids was based on an ionic liquid, [bmim]Br mediated one-pot three-component cascade reaction strategy involving 1,3-dipolar cycloaddition reaction of N-1-(2 ...
Raju Suresh Kumar   +4 more
doaj   +1 more source

Cationic Pyrrolidine/Pyrroline-Substituted Porphyrins as Efficient Photosensitizers against E. coli

open access: yesMolecules, 2021
New porphyrin–pyrrolidine/pyrroline conjugates were prepared by revisiting 1,3-dipolar cycloaddition reactions between a porphyrinic azomethine ylide and a series of dipolarophiles.
Bruno M. F. Ladeira   +7 more
doaj   +1 more source

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