Results 91 to 100 of about 6,809 (215)

Barbituric Acids as Nucleophiles in Enantioselective Mannich Reactions: Organocatalytic Access to Quaternary Aminopyrazolone–Barbiturate Adducts

Advanced Synthesis &Catalysis, Volume 368, Issue 15, 1 August 2026.
An enantioselective Mannich reaction using barbituric acids as nucleophiles provides access to chiral heterocycles bearing quaternary stereocenters. The transformation is catalyzed by a bifunctional thiourea with high selectivity. An immobilized catalyst enables recycling and application under continuous‐flow conditions, offering an efficient and ...
Rodrigo Sánchez‐Molpeceres, Mónica Llorente‐Pérez, Laura Martín, Alicia Maestro, José M. Andrés   +4 more
wiley   +1 more source

Ruthenium indenylidene "1st generation" olefin metathesis catalysts containing triisopropyl phosphite [PDF]

, 2015
The authors gratefully acknowledge the Royal Society (University Research Fellowship to CSJC) and the EC (CP-FP 211468-2 EUMET) for funding.The reaction of triisopropyl phosphite with phosphine-based indenylidene pre-catalysts affords “1st generation ...
Cazin, Catherine, Stefano Guidone, Slawin, Alexandra MZ, Slawin, Alexandra Martha Zoya, Nahra, Fady, Cazin, Catherine S.J., Guidone, Stefano, Catherine S. J. Cazin, Fady Nahra, Alexandra M. Z. Slawin   +9 more
core   +1 more source

Catalytic Enantioselective Multicomponent Reactions of Sulfoxonium Ylides Enabled by a Formal Rearrangement—A Versatile Entry to Enantioenriched α‐Sulfanyl Carbonyl Compounds

Angewandte Chemie, Volume 138, Issue 28, 6 July 2026.
A catalytic network embedding a formal rearrangement enables the first catalytic enantioselective multicomponent reaction (MCR) of sulfur ylides. In the presence of a bulky chiral phosphoric acid, the reaction combines sulfoxonium ylides, aldehydes and thiols, and affords synthetically versatile β‐hydroxy‐α‐sulfanyl carbonyl compounds in ...
Nicolò Santarelli, Pietro Pecchini, Nunzio Matera, Andrea Pellegrini, Riccardo Fabbri, Irati Celada Cubero, Leire Navarro Rubio, Cristina Di Pietro, Andrea Mazzanti, Mariafrancesca Fochi, Luca Bernardi   +10 more
wiley   +2 more sources

On the Role of Hydrogen Bond Strength and Charge Transfer in an On‐Water Diels–Alder Reaction: Semiempirical and Free Energy Calculations

Journal of Computational Chemistry, Volume 47, Issue 20, July 30, 2026.
Matched Diels‐Alder dienophiles at a water interface reveal that on‐water catalysis depends on hydrogen‐bond quality rather than hydrogen‐bond count. Oxygen preserves charge‐transfer coupling and lowers the free‐energy barrier, whereas sulfur disrupts this coupling and promotes an asynchronous pathway.
Andrés Henao, Yomna Gohar, René Wilhelm, Thomas D. Kühne   +3 more
wiley   +1 more source

Palladium and Organocatalysis: An Excellent Recipe for Asymmetric Synthesis

Molecules, 2013
The dual activation of simple substrates by the combination of organocatalysis and palladium catalysis has been successfully applied in a variety of different asymmetric transformations.
Isidro M. Pastor, Diego A. Alonso, Beatriz Maciá, M. Ángeles Fernández-Ibañez   +3 more
doaj   +1 more source

Heterogeneous Organocatalytic Synthesis of Propargylic Esters Using a Polymer‐Supported N‐Heterocyclic Carbene

ChemSusChem, Volume 19, Issue 14, 29 July 2026.
A vinyl addition polynorbornene (VA‐PNB)‐supported N‐Heterocyclic carbene precatalyst is successfully used in the metal‐free coupling of terminal alkynes, carbon dioxide, and chlorides toward propargylic esters. The conversion of carbon dioxide into high‐value chemical scaffolds is a central challenge in modern green chemistry. In this study, we report
Dimitrios K. Giannopoulos, Entzy Kaplanai, Carlos Lendínez, Sozan N. Abdullah, Ana C. Albéniz, Georgios C. Vougioukalakis   +5 more
wiley   +1 more source

Low-loading asymmetric organocatalysis [PDF]

, 2012
Asymmetric organocatalysis is now recognized as the third pillar of asymmetric synthesis. Recent years have witnessed increasing interest towards the use of highly active and stereoselective organocatalysts.
GRUTTADAURIA, Michelangelo, Michelangelo Gruttadauria, Renato Noto, NOTO, Renato, Paola Agrigento, GIACALONE, Francesco, AGRIGENTO, Paola, Francesco Giacalone   +7 more
core   +1 more source

organocatalysis

Citation: 'organocatalysis' in the IUPAC Compendium of Chemical Terminology, 5th ed.; International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.08193 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms.
openaire   +2 more sources

Shedding Light on Synthetic Autocatalysis: From Conventional Closed‐Shell Chemistries to Overlooked Open‐Shell Occurrences

Chemistry – A European Journal, Volume 32, Issue 28, 25 July 2026.
Why add another catalyst when the product itself holds the power to catalyze its own formation? Autocatalysis in synthetic chemistry enhances reaction efficiency and uncovers novel catalytic behavior across both closed‐shell and open‐shell systems, expanding reactivity and enabling innovative design strategies.
Jaspreet Kaur, Joshua P. Barham
wiley   +1 more source

Ring-Opening Copolymerization of 4D Polyesters Using Supramolecular Thiourea/Organocatalysis [PDF]

, 2023
Organocatalysis is explored to drive ring-opening copolymerization of anhydrides and epoxides yielding 3D printable ...
Merckle, David
core