Results 71 to 80 of about 25,558 (236)

An efficient and facile access to highly functionalized pyrrole derivatives

Beilstein Journal of Organic Chemistry, 2018
A straightforward and one-pot synthesis of pyrrolo[3,4-c]pyrrole-1,3-diones via Ag(I)-catalyzed 1,3-dipolar cycloaddition of azomethine ylides with N-alkyl maleimide, followed by readily complete oxidation with DDQ, has been successfully developed ...
Meng Gao, Wenting Zhao, Hongyi Zhao, Ziyun Lin, Dongfeng Zhang, Haihong Huang   +5 more
doaj   +1 more source

A Facile One-Pot Construction of Succinimide-Fused Spiro[Pyrrolidine-2,3′-Oxindoles] via 1,3-Dipolar Cycloaddition Involving 3-Amino Oxindoles and Maleimides

Molecules, 2018
Increasing interests have been invested in the development of synthetic strategies toward the construction of spiro[pyrrolidine-2,3′-oxindole], which is the core structural skeleton in some compounds with diverse biological activities.
Lunqiang Jin, Feng Liang
doaj   +1 more source

Modern Methods for Conjugated Polymers Preparation: A Concept of Transition Metal‐Free Synthesis

European Journal of Organic Chemistry, Volume 28, Issue 2, January 10, 2025.
Conjugated polymers (CPs) are promising organic materials currently at the center of the organic electronics revolution. Synthesis strategies play a crucial role in the rise of this field, and this review aims to shed light on transition metal‐free organic chemistry for the synthesis of conjugated polymers, which is currently experiencing a renaissance.
Tomaž Kotnik, Sebastijan Kovačič
wiley   +1 more source

Diastereodivergent Asymmetric 1,3-Dipolar Cycloaddition of Azomethine Ylides and β-Fluoroalkyl Vinylsulfones: Low Cu(II) Catalyst Loading and Theoretical Studies.

Angewandte Chemie, 2019
We have developed Cu(II)-catalyzed asymmetric 1,3-dipolar cycloadditions using β-fluoroalkyl alkenyl arylsulfones as dipolarophiles and glycine/alanine iminoesters as azomethine ylide precursors.
Feng Cheng, S. J. Kalita, Zhen‐Ni Zhao, Xing Yang, Yan Zhao, U. Schneider, N. Shibata, Yiyong Huang   +7 more
semanticscholar   +1 more source

Enantioselective Organozinc Addition to Aldehydes Using Planar Chiral [2.2]Paracyclophane‐Imidazoline N,O‐Ligands

Chemistry – A European Journal, Volume 30, Issue 72, December 23, 2024.
A convenient synthesis of planar chiral [2.2]paracyclophane imidazoline N,O‐ligands has been developed. The application of these classes of ligands showed excellent performance in organozinc additions to aldehydes. An improved seven‐step synthesis of [2.2]paracyclophane‐imidazoline N,O‐ligands (UCD‐Imphanols) possessing both central and planar ...
Sundaravel Vivek Kumar, Patrick J Guiry
wiley   +1 more source

Catalytic Enantioselective Functionalization of Maleimides: An Update

Chinese Journal of Chemistry, Volume 42, Issue 24, Page 3605-3622, 15 December 2024.
Maleimides are multisite‐reactive scaffolds that have stimulated a growing interest in the field of synthetic organic chemistry. The present review covers the utilization of maleimides as electrophilic partners and pro‐nucleophilic partners in metal‐catalyzed or organocatalyzed functionalizations with the control of either central and/or axial ...
Muriel Amatore, Damien Bonne, Thierry Constantieux, Jean Rodriguez   +3 more
wiley   +1 more source

1,2‐Diaza‐1,3‐Dienes as a Multifaceted Synthons for the Synthesis of Heterocycles: A Fifteen‐Years Update

European Journal of Organic Chemistry, Volume 27, Issue 44, November 25, 2024.
1,2‐Diaza‐1,3‐butadienes, also called azoalkenes, have received considerable attention as key synthons for constructing various heterocyclic scaffolds. This minireview summarizes the contribution of our group in this field over the period from 2009 to the present, focusing on the role of the azoene building block in forming the heterocyclic structures.
Lucia De Crescentini, Giacomo Mari, Stefania Santeusanio, Gianfranco Favi, Fabio Mantellini   +4 more
wiley   +1 more source

Highly Efficient Asymmetric [3+2] Cycloaddition Promoted by Chiral Aziridine-Functionalized Organophosphorus Compounds

Molecules
The asymmetric [3+2] cycloaddition of azomethine ylides generated from the corresponding imino ester-to-trans-β-nitrostyrene catalysis by chiral aziridine-containing phosphines and phosphine oxides is described. Of the sixteen stereoisomers that could be
Julia Szymańska, Michał Rachwalski, Adam M. Pieczonka   +2 more
doaj   +1 more source

Addition of azomethine ylides to carbon-encapsulated iron nanoparticles

Dalton Transactions, 2018
Carbon-encapsulated iron nanoparticles have been covalently functionalized using the Prato reaction.
Artur Kasprzak, Anna M. Nowicka, Jakub P. Sek, Maciej Fronczak, Michał Bystrzejewski, Mariola Koszytkowska-Stawinska, Magdalena Poplawska   +6 more
openaire   +4 more sources

CuI-Catalyzed Asymmetric [3 + 2] Cycloaddition of Azomethine Ylides with Cyclobutenones.

Organic Letters, 2018
The catalytic asymmetric 1,3-dipolar cycloaddition of cyclobutenones with azomethine ylides provides straightforward access to densely substituted 3-azabicyclo[3.2.0]heptanes.
Javier Corpas, Alberto Ponce, J. Adrio, J. Carretero   +3 more
semanticscholar   +1 more source