Results 71 to 80 of about 2,787 (213)

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

Regio- and stereoselectivity of the 1,3-dipolar cycloaddition of azomethine ylides to (E)-3-(2-oxo-2-(pyren-1-yl)ethylidene)indolin-2-ones: A combined experimental and theoretical study

Arabian Journal of Chemistry, 2022
Functionalized oxindoles and pyrrolizidines form the central structural framework for numerous natural products with extensive biological and pharmacological applications.
Essam M. Hussein, Ziad Moussa, Uttam Pal, Reem I. Alsantali, Abdullah Y.A. Alzahrani, Rami J. Obaid, Fawaz M. Alzahrani, Munirah M. Al-Rooqi, Meshari A. Alsharif, Nizar El Guesmi, Rabab S. Jassas, M. Shaheer Malik, Hatem M. Altass, Samir K. Pal, Tanusri Saha Dasgupta, Saleh A. Ahmed   +15 more
doaj  

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

Photocatalyst‐Free Wavelength‐Dependant Sequential Ring Transformations of Pyrazolo[1,2‐a]pyrazolones

Advanced Synthesis &Catalysis, Volume 366, Issue 21, Page 4441-4451, November 5, 2024.
Abstract We report sequential wavelength‐selective photochemical transformations of 1‐alkenylpyrazolo[1,2‐a]pyrazolones to pyrazolo[1,2‐a][1,2]diazepines or cyclobuta[c]pyrazolo[1,2‐a]pyrazolones. Irradiation of 1‐alkenylpyrazolo[1,2‐a]pyrazolones with visible‐light (blue LED, 457 nm) induced selective ‘ring switching’ transformation into pyrazolo[1,2 ...
Ines Kulašić, Nejc Petek, Helena Brodnik, Uroš Grošelj, Jurij Svete, Bogdan Štefane   +5 more
wiley   +1 more source

1,3-Dipolar Cycloaddition Reactions of Azomethine Ylides with Carbonyl Dipolarophiles Yielding Oxazolidine Derivatives

Molecules, 2016
We provide a comprehensive account of the 1,3-dipolar cycloaddition reactions of azomethine ylides with carbonyl dipolarophiles. Many different azomethine ylides have been studied, including stabilized and non-stabilized ylides.
Adam G. Meyer, John H. Ryan
doaj   +1 more source

Ex Situ Covalent Functionalization of Germanene via 1,3‐Dipolar Cycloaddition: A Promising Approach for the Bandgap Engineering of Group‐14 Xenes

Small, Volume 20, Issue 45, November 7, 2024.
Germanene is produced by the thermal dehydrogenation of germanane in order to generate the dipolarophilic sp2 domains, where the cycloaddition of the azomethine ylide can take place. The azomethine ylide is generated by the decarboxylative condensation of 3,4 dihydroxybenzaldehyde and sarcosine. Abstract Group‐14 Xenes beyond graphene such as silicene,
Theodosis Giousis, Panagiota Zygouri, Niki Karouta, Konstantinos Spyrou, Mohammed Subrati, Dimitrios Moschovas, Marc C. A. Stuart, Hamoon Hemmatpour, Dimitrios P. Gournis, Petra Rudolf   +9 more
wiley   +1 more source

Non‐Alternant Nanographenes Bearing N‐Doped Non‐Hexagonal Pairs: Synthesis, Structural Analysis and Photophysical Properties

Angewandte Chemie, Volume 136, Issue 42, October 14, 2024.
Progress in the development of non‐alternant nanographenes containing N‐doped non‐hexagonal pairs, including N‐doped pentagon‐heptagon (5–7) pairs, N‐doped pentagon‐octagon (5–8) pairs and N‐doped heptagon‐heptagon (7–7) pairs, is comprehensively covered in this review.
Huan Luo, Junzhi Liu
wiley   +1 more source

The regioselective synthesis of spirooxindolo pyrrolidines and pyrrolizidines via three-component reactions of acrylamides and aroylacrylic acids with isatins and α-amino acids

Beilstein Journal of Organic Chemistry, 2014
The regioselective three-component condensation of azomethine ylides derived from isatins and α-amino acids with acrylamides or aroylacrylic acids as dipolarophiles has been realized through a one-pot 1,3-dipolar cycloaddition protocol.
Tatyana L. Pavlovskaya, Fedor G. Yaremenko, Victoria V. Lipson, Svetlana V. Shishkina, Oleg V. Shishkin, Vladimir I. Musatov, Alexander S. Karpenko   +6 more
doaj   +1 more source

Synthesis of Dihydrouracils Spiro-Fused to Pyrrolidines: Druglike Molecules Based on the 2-Arylethyl Amine Scaffold

Molecules, 2010
The synthesis of a small library of dihydrouracils spiro-fused to pyrrolidines is described. These compounds are synthesized from b-aryl pyrrolidines, providing products with the 2-arylethyl amine moiety, a structural feature often encountered in ...
Daniel Blanco-Ania, Carolina Valderas-Cortina, Pedro H.H. Hermkens, Leo A.J.M. Sliedregt, Hans W. Scheeren, Floris P.J.T. Rutjes   +5 more
doaj   +1 more source

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

J Org Chem, 2023
Wu KJY, Benedetto AE, Myers AG.
europepmc   +1 more source