Results 81 to 90 of about 2,457 (204)

Redox‐Active Guanidines

ChemElectroChem, Volume 13, Issue 12, 17 June 2026.
Redox‐active guanidines, comprising guanidino‐functionalized aromatics (GFAs) and redox‐active urea azines (RAAs), are electron donors and strong Lewis and Brønsted bases that are used in several applications. They act as redox‐active ligands in bistable coordination compounds and as reagents in dehydrogenative coupling reactions and proton‐coupled ...
Hans‐Jörg Himmel
wiley   +1 more source

Substrate‐Controlled Organocatalytic Divergent Annulations of γ, γ’‐Alkylidene Indane‐1,3‐Diones With Enals

Advanced Synthesis &Catalysis, Volume 368, Issue 11, 3 June 2026.
A substrate‐dependent, regio‐ and stereocontrolled diversity‐oriented organocatalytic vinylogous Michael addition/cyclization cascade of γ, γ’‐alkylidene indane‐1,3‐diones with enals, using secondary amines as the catalyst, has been developed. A substrate‐dependent, regio‐ and stereo‐controlled diversity‐oriented organocatalytic vinylogous Michael ...
Jen‐Yu Kuan, Bo‐Wei Huang, Jeng‐Liang Han   +2 more
wiley   +1 more source

Use of Novel Homochiral Thioureas Camphor Derived as Asymmetric Organocatalysts in the Stereoselective Formation of Glycosidic Bonds

Molecules
We synthesized six new camphor-derived homochiral thioureas 1–6, from commercially available (1R)-(−)-camphorquinone. These new compounds 1–6 were evaluated as asymmetric organocatalysts in the stereoselective formation of glycosidic bonds, with 2,3,4,6 ...
Mildred López, Gabriela Huelgas, Mario Sánchez, Adalid Armenta, Angel Mendoza, José Daniel Lozada-Ramírez, Cecilia Anaya de Parrodi   +6 more
doaj   +1 more source

Selective Rh(II)‐Catalyzed Intermolecular Oxyamidation and Acid‐Promoted Nucleophilic Cyclization Cascade of Enamides

ChemistryEurope, Volume 4, Issue 6, June 2026.
A structurally diverse series of 1‐amino‐izidine scaffolds was accessed through a cascade process combining rhodium‐catalyzed nitrene‐transfer oxyamidation with subsequent nucleophilic cyclization under acidic conditions, proceeding via an in situ generated iminium intermediate.
Grégory Jestin, Romain Rey‐Rodriguez, Romane Manguin, Pascal Retailleau, Philippe Dauban, Isabelle Gillaizeau   +5 more
wiley   +1 more source

Recent Advances in Intramolecular C─N Bond Formation for Pyrrolidine Synthesis

ChemistryOpen, Volume 15, Issue 6, June 2026.
This review highlights synthetic advances (2013–2025) in intramolecular C─N bond formation for constructing the pharmaceutically relevant pyrrolidine core. The review is organized into five methodological clusters: 1) intramolecular alkene/alkyne amination; 2) tandem annulations, which involve C─N bond formation as the key step; 3) nucleophilic ...
Rasma Kroņkalne, Māris Turks
wiley   +1 more source

Chiral Bicomponent Melamine/Amino Acid Eutectogels: Efficient Catalysts for the Aldol Reaction

ChemSusChem, Volume 19, Issue 10, 27 May 2026.
Chiral bicomponent eutectogels were used as confined reaction media for stereoselective aldol reaction between cyclohexanone and p‐nitrobenzaldehyde, proving efficient and reusable catalysts. Supramolecular gels, characterized by reversibility, stimuli responsiveness, and high surface area, represent a promising class of materials in catalysis. In this
Salvatore Marullo, Paolo Reale, Francesca D’Anna   +2 more
wiley   +1 more source

Metal‐Free and Solvent‐Free CO2 Fixation Into Cyclic Carbonates Catalyzed by a Deferiprone‐Derived Bifunctional System

European Journal of Organic Chemistry, Volume 29, Issue 20, 27 May 2026.
A simple bifunctional organocatalyst derived from the FDA‐approved chelator deferiprone efficiently promotes CO2 fixation into cyclic carbonates. By combining epoxide activation and nucleophilic ring opening in a single scaffold, quantitative conversions are achieved under mild, metal‐free conditions. High activity, broad substrate scope, and excellent
Erika Saccullo, Luca Calantropo, Roberto Fiorenza, Pietro Nicotra, Antonio Rescifina, Vincenzo Patamia, Giuseppe Floresta   +6 more
wiley   +1 more source

Probing Electronic Effects Upon Nucleophilicity and Lewis Basicity of Isothiourea HyperBTM Catalyst Derivatives

ChemistryEurope
Isothioureas have become a cornerstone of modern Lewis base organocatalysis being involved in a plethora of applications ranging from large scale syntheses to enantioselective reactions to immobilised catalysts.
Kevin Kasten, Andreas Eitzinger, Lotte Stockhammer, Joanne Dunne, Lukas S. Vogl, Zhanyu Zhou, Mario Waser, Armin R. Ofial, Andrew D. Smith   +8 more
doaj   +1 more source

SPECIFIC “IONIC LIQUIDS” AS NEW ORGANOCATALYSTS OF BIGINELLI REACTION [PDF]

Chemistry Journal of Moldova: General, Industrial and Ecological Chemistry, 2008
New ionic liquids bearing an imidazolium core with a carboxy group have been prepared in an attempt to design new organocatalysts of Biginelli reaction. Trends in the properties of these compounds are discussed.
Viorica Sargarovschi, Eugenia Styngach, Fliur Macaev   +2 more
doaj  

Porcine Liver Esterase‐Catalyzed Dynamic Kinetic Resolution of a Lactone‐Bridged Biaryl: Impact of Organic Cosolvents on Enantioselectivity

European Journal of Organic Chemistry, Volume 29, Issue 20, 27 May 2026.
A stereolabile lactone‐bridged biaryl enables dynamic kinetic resolution to provide a conformationally stable ring‐opened biaryl. A significant positive effect of water‐immiscible organic cosolvents on the enantioselectivity in a reaction catalyzed by porcine liver esterase has been discovered for the first time.
Neha Dhiman, Anke Hummel, Kyohei Kanomata, Yoshinari Sawama, Tohru Taniguchi, Harald Gröger, Shuji Akai   +6 more
wiley   +1 more source