Results 141 to 150 of about 16,879 (311)
Recent advances in catalysis using transition metals-bounding organic ligands assisted by ultrasound and/or microwave [PDF]
, 2015 Usually, in organic and organometallic synthesis an external conventional heat source is applied to carry out a chemical reaction at high temperature. Nonetheless, these conventional heating systems have some disadvantages as the heterogeneous heating ...
Domini, Claudia Elizabeth +2 more
core +1 more source
Solution phase, solid state, and theoretical investigations on the MacMillan imidazolidinone [PDF]
, 2009 A combination of soln. phase NMR, X-ray crystallog. studies, and DFT calcns.
Brazier, John B. +6 more
core +1 more source
Supramolecular polymers for organocatalysis in water
Organic & Biomolecular Chemistry, 2015 An l-proline-functionalised benzene-1,3,5-tricarboxamide derivative self-assembles in water into well-defined, one-dimensional, helical, supramolecular polymers that efficiently catalyse aldol reactions.
Christianus M. A. Leenders +6 more
openaire +4 more sources
(Thio)urea-mediated synthesis of functionalized six-membered rings with multiple chiral centers
Beilstein Journal of Organic Chemistry, 2016 Organocatalysis, now running its second decade of life, is being considered one of the main tools a synthetic chemist has to perform asymmetric catalysis. In this review the synthesis of six-membered rings, that contain multiple chiral centers, either by
Giorgos Koutoulogenis +2 more
doaj +1 more source
ChemSusChem, Volume 18, Issue 15, July 27, 2025.This study presents a sustainable, metal‐free, one‐pot synthesis of γ‐keto sulfones and phosphine oxides using a ChCl/p‐TSA·H2O eutectic mixture. The method enables regioselective CC and CX bond formation under mild conditions, aligning with Green Chemistry Principles.
Marina Ramos‐Martín +2 more
wiley +1 more source
Beilstein Journal of Organic Chemistry, 2016 Chiral binaphthyl-modified squaramide-catalyzed enantioselective addition of diphenyl phosphonate to ketimines derived from isatins has been achieved. This method affords practical and efficient access to chiral 3-amino-3-phosphonyl-substituted oxindole ...
Hee Seung Jang, Yubin Kim, Dae Young Kim
doaj +1 more source
Rapid, General Access to Chiral β-Fluoroamines and β,β-Difluoroamines via Organocatalysis [PDF]
, 2009 Olugbeminiyi Fadeyi, Craig W. Lindsley
openalex +1 more source
Enantioselective Anion‐Binding‐Catalyzed Nucleophilic Addition to 4‐Quinolones
European Journal of Organic Chemistry, Volume 28, Issue 27, July 25, 2025.The first organocatalytic enantioselective formal 1,4‐addition to 4‐quinolones has been developed. This method relies on chiral triazole‐based anion‐binding catalysis using enol nucleophiles, complementing previous metal catalytic approaches. Moderate to good yields and enantioselectivities were achieved by in situ silylation and formation of a key ...
Martin Aleksiev +2 more
wiley +1 more source
Development of an Organoautocatalyzed Double σ‐Bond C(sp2)‐N Transamination Metathesis Reaction
Angewandte Chemie, Volume 137, Issue 28, July 7, 2025.Organoautocatalyzed transamination metathesis of cyclic tertiary amines is disclosed as a high‐yielding, scalable reaction that proceeds under mild, catalyst‐free conditions. It operates via a multi‐step domino reaction mechanism, where an in situ‐formed pyrrolidinium salt functions as a HBD organoautocatalyst.
Volker Klein +7 more
wiley +2 more sources
Beilstein Journal of Organic Chemistry, 2012 A versatile nitro-Mannich/lactamisation cascade for the direct stereoselective synthesis of heavily decorated 5-nitropiperidin-2-ones and related heterocycles has been developed. A highly enantioenriched substituted 5-nitropiperidin-2-one was synthesised
Pavol Jakubec +4 more
doaj +1 more source