Results 71 to 80 of about 25,799 (236)

1,3-Dipolar Cycloaddition of Isatin-Derived Azomethine Ylides with 2 H-Azirines: Stereoselective Synthesis of 1,3-Diazaspiro[bicyclo[3.1.0]hexane]oxindoles.

Journal of Organic Chemistry, 2019
A regio- and diastereoselective 1,3-dipolar cycloaddition of 2 H-azirines with azomethine ylides generated in situ from isatins and α-amino acids has been elaborated, affording an unprecedented aziridine-fused spiro[imidazolidine-4,3'-oxindole] framework.
A. Angyal, András Demjén, V. Harmat, J. Wölfling, L. Puskás, I. Kanizsai   +5 more
semanticscholar   +1 more source

Recent Advances in Metallated Azomethine Ylides for the Synthesis of Chiral Unnatural α-Amino Acids

Youji huaxue, 2019
The development of efficient methods for the preparation of unnatural amino acids has long been an important goal since their widely application in synthetic and medicinal chemistry. The asymmetric α-functionalization of nucleophilic metalated azomethine
Liang Wei, L. Xiao, Yuanyuan Hu, Zuoquan Wang, H. Tao, Chun‐Jiang Wang   +5 more
semanticscholar   +1 more source

Thioxanthone: A Benchmark Photocatalyst for Organic Synthesis

ChemCatChem, Volume 17, Issue 16, August 18, 2025.
Thioxanthone is a highly versatile and effective organocatalyst for photochemical applications, with its low‐toxicity, metal‐free structure driving growing interest in sustainable photocatalysis. Building on our previous 2021 review, this update covers advances from 2021–2025 in thioxanthone‐based synthetic organic photochemistry – excluding ...
Vera P. Demertzidou, Elpida Skolia, Christoforos G. Kokotos   +2 more
wiley   +1 more source

Synthesis, Photophysical, and Chemiexcitation Properties of Luminol‐Fullerene Dyads: Toward Chemiexcitation Electron Transfer

Chemistry – A European Journal, Volume 31, Issue 40, July 17, 2025.
The emission properties of fullerene‐luminol dyads, following either irradiation or chemiexcitation, are evaluated. Strong luminol (chemi)luminescence quenching is partially attributed to electron transfer. Abstract Fullerene‐based donor‐acceptor (D‐A) dyads have been extensively studied for their unique electronic properties, with applications in ...
Theodoros Mikroulis, Gemma M. Rodríguez‐Muñiz, Demeter Tzeli, Georgios Rotas, Miguel A. Miranda, Georgios C. Vougioukalakis   +5 more
wiley   +1 more source

An effective one-pot access to polynuclear dispiroheterocyclic structures comprising pyrrolidinyloxindole and imidazothiazolotriazine moieties via a 1,3-dipolar cycloaddition strategy

Beilstein Journal of Organic Chemistry, 2016
An effective and highly regio- and diastereoselective one-pot method for the synthesis of new polynuclear dispiroheterocyclic systems with five stereogenic centers (dispiro[imidazo[4,5-e]thiazolo[3,2-b]-1,2,4-triazine-6,3′-pyrrolidine-2′,3′′-indoles ...
Alexei N. Izmest’ev, Galina A. Gazieva, Natalya V. Sigay, Sergei A. Serkov, Valentina A. Karnoukhova, Vadim V. Kachala, Alexander S. Shashkov, Igor E. Zanin, Angelina N. Kravchenko, Nina N. Makhova   +9 more
doaj   +1 more source

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

Fused Nitrogen Bridgehead N,O‐Acetals as Versatile Scaffolds: Synthetic Strategies, Mechanism and Applications

Chemistry – A European Journal, Volume 31, Issue 32, June 6, 2025.
Fused nitrogen‐bridgehead N,O‐acetals receive specific emphasis as pivotal scaffolds due to their significant role in the bioactivity of medicinally relevant molecules. Significant approaches have been reported on their role as key synthetic building blocks/motifs in the construction of complex organic molecules and their utility as chiral auxiliaries ...
Alexis D. Kouvelas, Michael G. Kallitsakis, Ioannis N. Lykakis   +2 more
wiley   +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

Catalysis in Chemical Modification of Proteins

ChemCatChem, Volume 17, Issue 11, June 6, 2025.
Catalytic principles of synthetic organic chemistry have been increasingly applied to chemical modification of proteins during the recent years. This review article describes how seven types of catalytic systems —electrocatalysis, photocatalysis, metal catalysis, acid catalysis, organocatalysis, supramolecular catalysis, and heterogeneous catalysis ...
Seiya Ishizawa, Koki Fujimura, Kounosuke Oisaki, Shinichi Sato, Jun Ohata   +4 more
wiley   +1 more source

Open‐Chain Tetrapyrroles Meet Metal Ions in the Functional Molecular Material Science

ChemPlusChem, Volume 90, Issue 6, June 2025.
Open‐chain tetrapyrroles, synthesized via oxidative cleavage and condensation, offer greater structural flexibility than cyclic counterparts like porphyrins. Their tunable electronic and geometric properties through metalation enable applications in bioimaging, therapies, ion sensing, chiroptical materials, and spintronic devices, making them valuable ...
Aninda Ghosh, Sandipa Bhandari, Hiroyuki Furuta, Masatoshi Ishida   +3 more
wiley   +1 more source