Results 21 to 30 of about 32,578 (240)

Azomethine Ylides—Versatile Synthons for Pyrrolidinyl-Heterocyclic Compounds

open access: yesMolecules, 2023
Azomethine ylides are nitrogen-based three-atom components commonly used in [3+2]-cycloaddition reactions with various unsaturated 2π-electron components.
Siva S. Panda   +3 more
doaj   +3 more sources

Photoinduced Nonstabilized Azomethine Ylide Formation for the Preparation of Fluorine Containing Pyrrolidines.

open access: yesJournal of Organic Chemistry, 2019
A mild and reproducible method for the formation of a nonstabilized azomethine ylide was developed by photoinduced reaction catalyzed with eosin Y under green light irradiation. Resulting 1,3-dipole was trapped with fluoroalkenes, fluoroalkylated alkenes,
Thibault Thierry   +3 more
semanticscholar   +2 more sources

Azomethine Ylide Cycloaddition Approach toward Dendrobine: Synthesis of 5-Deoxymubironine C.

open access: yesJournal of Organic Chemistry, 2018
A concise route to the azatricyclo­[6.2.1.04,11]­undecane core of (−)-dendrobine and (−)-mubironine C is described wherein an unstabilized azomethine ylide cycloaddition provides the complete carbon framework of the natural products.
Benjamin M Williams, D. Trauner
semanticscholar   +3 more sources

General Pyrrolidine Synthesis via Iridium-Catalyzed Reductive Azomethine Ylide Generation from Tertiary Amides and Lactams. [PDF]

open access: yesACS Catal, 2021
An iridium-catalyzed reductive generation of both stabilized and unstabilized azomethine ylides and their application to functionalized pyrrolidine synthesis via [3 + 2] dipolar cycloaddition reactions is described.
Yamazaki K   +6 more
europepmc   +2 more sources

Perspectives on Intermolecular Azomethine Ylide [3+2] Cycloadditions with Non-Electrophilic Olefins

open access: yesSynthesis, 2016
Our interest in the synthesis of compact nitrogen heterocycles from abundant sources has motivated a critical analysis of the status in azomethine ylide chemistry.
J. Otero-Fraga   +2 more
semanticscholar   +2 more sources

[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

Transition-Metal-Free Access to Pyridocarbazoles from 2-Alkynylindole-3-carbaldehydes via Azomethine Ylide.

open access: yesJournal of Organic Chemistry, 2018
An efficient approach for the synthesis of functionalized tetrahydro-pyrido/quinolinocarbazoles from 2-alkynylindole-3-carbaldehydes and l-proline utilizing a metal-free decarboxylative cyclization, ring expansion, and ring contraction strategy via the ...
Shalini Verma   +4 more
semanticscholar   +2 more sources

Synthesis of Main-Chain Poly(fullerene)s from a Sterically Controlled Azomethine Ylide Cycloaddition Polymerization

open access: yes, 2016
Fullerene is used as a monomer in this simple method to prepare soluble, well-defined polymers. The sterically controlled azomethine ylide cycloaddition polymerization of fullerene (SACAP) yields macromolecules with molecular weights of around 25 000 g ...
Hasina H Ramanitra   +11 more
semanticscholar   +2 more sources

Synthesis of Small 3-Fluoro- and 3,3-Difluoropyrrolidines Using Azomethine Ylide Chemistry.

open access: yesJournal of Organic Chemistry, 2015
Here, we report accessing small 3-fluoropyrrolidines and 3,3-difluoropyrrolidines through a 1,3-dipolar cycloaddition with a simple azomethine ylide and a variety of vinyl fluorides and vinyl difluorides.
Indrawan J. McAlpine   +13 more
semanticscholar   +2 more sources

Heterogeneous graphene oxide as recyclable catalyst for azomethine ylide mediated 1,3 dipolar cycloaddition reaction in aqueous medium. [PDF]

open access: yesRSC Adv, 2018
Graphene oxide (GO) catalysed multi component reaction of azomethine ylide driven 1,3 dipolar cycloaddition reaction in aqueous ethanolic solution is reported for the first time. This strategy has been applied for the synthesis of poly heterocyclic spiro-
Reddy MS, Kumar NS, Chowhan LR.
europepmc   +2 more sources

Home - About - Disclaimer - Privacy