Results 91 to 100 of about 3,294 (234)

Recent Advancements in the Cyclization Strategies of 1,3‐Enynes Towards the Synthesis of Heterocyclic/Carbocyclic Frameworks

open access: yesChemistry – An Asian Journal, Volume 20, Issue 8, April 17, 2025.
In this review, the advancements in the cyclization of 1,3‐enynes to construct structurally diverse heterocyclic and carbocyclic frameworks are portrayed comprehensively. Divergent cyclization protocols along with mechanistic aspects for key transformations are also detailed. Abstract 1,3‐Enynes have demonstrated their utility as valuable precursors to
Akash P. Sakla   +4 more
wiley   +1 more source

Ionic Liquids Immobilized on Magnetic Nanoparticles [PDF]

open access: yes, 2017
Ionic liquids (ILs) immobilized on supports are among the most important derivatives of ILs. The immobilization process of ILs can transfer their desired properties to substrates.
Mokhtary, Masoud
core   +1 more source

Cooperative Vinylogous Enamine and Metal Catalysis

open access: yesChemCatChem, Volume 17, Issue 7, April 4, 2025.
This review describes transformations combining vinylogous enamine catalysis with transition metal or Lewis acid catalysis that have emerged since the seminal report of dienamine catalysis in 2006. These transformations span numerous reaction classes, including alkylation, allylation, propargylation, oxyamination, dimerization, as well as cascade ...
Stacey E. Brenner‐Moyer
wiley   +1 more source

Structural basis of the stereoselective formation of the spirooxindole ring in the biosynthesis of citrinadins [PDF]

open access: gold, 2021
Zhiwen Liu   +12 more
openalex   +1 more source

Microwave‐Assisted Multicomponent Synthesis of Spirooxindole Dihydropyridine Bisphosphonates

open access: yesEuropean Journal of Organic Chemistry, Volume 28, Issue 6, February 10, 2025.
A new, simple, catalyst‐ and solvent‐free microwave‐assisted multicomponent method was developed for the synthesis of spirooxindole dihydropyridine bisphosphonates as a new family of compounds by the one‐pot reaction of isatins, β‐ketophosphonates and primary amines.
Bettina Rávai   +3 more
wiley   +1 more source

Synthesis of Isoxazolopyridines and Spirooxindoles under Ultrasonic Irradiation and Evaluation of Their Antioxidant Activity

open access: yesJournal of Chemistry, 2017
New polycyclic-fused isoxazolo[4,5-e]pyridines and spirooxindoles were obtained via multicomponent reaction of 5-amino-3-methylisoxazole, indan-1,3-dione, and aromatic aldehydes and reaction of 5-amino-3-methylisoxazole, isatin, and β-diketones in the ...
Emel Pelit
doaj   +1 more source

A Regioselective Multicomponent Approach for the Synthesis of Novel 2‐Acetyl‐4‐phenylquinoline Designed Monospiro‐Pyrrolidine and Thiapyrrolizidine Hybrids

open access: yesHeteroatom Chemistry, Volume 2025, Issue 1, 2025.
A convenient approach for the synthesis of 2‐acetyl‐4‐phenylquinoline designed monospiro‐pyrrolidine/thiapyrrolizidine hybrids has been achieved via a 1,3‐dipolar cycloaddition reaction of various azomethine ylides derived from isatin/acenaphthylene‐1,2‐dione/ninhydrin, ortho‐phenylenediamine and sarcosine/L‐4‐thiazolidinecarboxylic acid with 2‐acetyl ...
Satheeshkumar Rajendran   +3 more
wiley   +1 more source

Recent Developments in the Synthesis of Chiral Compounds with Quaternary Centers by Organocatalytic Cascade Reactions [PDF]

open access: yes, 2016
Quaternary carbon stereocenters are present in a wide variety of organic compounds and drug molecules. Highly enantioselective construction of such quaternary carbon stereocenters has received considerable attention owing to the great challenges in their
Ahrendt   +98 more
core   +1 more source

Straightforward Regio- and Diastereoselective Synthesis, Molecular Structure, Intermolecular Interactions and Mechanistic Study of Spirooxindole-Engrafted Rhodanine Analogs [PDF]

open access: gold, 2021
Assem Barakat   +6 more
openalex   +1 more source

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