Results 21 to 30 of about 1,833 (153)

Do We Need Asymmetric Organocatalysis?

open access: yesCHIMIA, 2007
Asymmetric organocatalysis is a 'fast lane' of the chemical highway: the progress in the last decade is simply spectacular. This introductory article summarizes basic principles, historical background, and discusses basic catalyst classes and ...
Peter I. Dalko
doaj   +3 more sources

Evolution of design approaches in asymmetric organocatalysis over the last decade

open access: yesTetrahedron Chem, 2023
This perspective intends to cover the vast field of asymmetric organocatalysis and its evolution during the last ten years. This work has evaluated the corresponding timeline of the progression of the field concerning the main synthetic approaches as ...
Nika Melnyk   +3 more
doaj   +1 more source

Recent Advances in the Enantioselective Radical Reactions

open access: yesMolecules, 2023
The review covers research published since 2017 and is focused on enantioselective synthesis using radical reactions. It describes recent approaches to the asymmetric synthesis of chiral molecules based on the application of the metal catalysis, dual ...
Tomasz Bauer   +2 more
doaj   +1 more source

Asymmetric Organocatalysis with Chiral Covalent Organic Frameworks

open access: yesOrganic Materials, 2021
Inspired by Mother Nature, the use of chiral covalent organic frameworks as heterogeneous asymmetric organocatalysts has arisen over the last decade as a new method in enantioselective synthesis.
Song-Chen Yu, Liang Cheng, Li Liu
doaj   +1 more source

Recent Advances in Asymmetric Synthesis of Pyrrolidine-Based Organocatalysts and Their Application: A 15-Year Update

open access: yesMolecules, 2023
In 1971, chemists from Hoffmann-La Roche and Schering AG independently discovered a new asymmetric intramolecular aldol reaction catalyzed by the natural amino acid proline, a transformation now known as the Hajos–Parrish–Eder–Sauer–Wiechert reaction ...
Arianna Quintavalla   +2 more
doaj   +1 more source

Organocatalysts for enantioselective synthesis of fine chemicals: definitions, trends and developments

open access: yesScienceOpen Research, 2015
Organocatalysis, that is the use of small organic molecules to catalyse organic transformations, has been included among the most successful concepts in asymmetric catalysis and it has been used for the enantioselective construction of C-C, C-N, C-O, C-S,
Chiara Palumbo
doaj   +5 more sources

Reacciones asimétricas organocatalizadas en ausencia de disolvente: una estrategia para hacer más “verde” la organocatálisis

open access: yesEducación Química, 2018
Solvent-free asymmetric organocatalyzed reactions: a strategy towards a greener organocatalysis According with the principles of “green” chemistry, asymmetric organocatalysis aims to become a sustainable strategy to catalyze a wide range of chemical ...
José G. Hernández, Eusebio Juaristi
doaj   +1 more source

Cinchona Alkaloids in Asymmetric Organocatalysis [PDF]

open access: yesSynthesis, 2010
This article reviews the applications of cinchona alkaloids as asymmetric catalysts. In the last few years, characterized by the resurgence of interest in asymmetric organocatalysis, cinchona derivatives have been shown to catalyze an outstanding array of chemical reactions, often with remarkable stereoselectivity. This work presents an overview of the
Marcelli, T., Hiemstra, H.
openaire   +2 more sources

Magnetic nanoparticle-supported organocatalysis

open access: yesGreen Processing and Synthesis, 2013
Magnetic nanoparticle (MNP)-supported catalysis is a new method to facilitate catalyst separation and reuse. This technique has recently been introduced for organocatalysis.
Huang Yibo, Zhang Wei
doaj   +1 more source

Advances in the Asymmetric Total Synthesis of Natural Products Using Chiral Secondary Amine Catalyzed Reactions of α,β-Unsaturated Aldehydes

open access: yesMolecules, 2019
Chirality is one of the most important attributes for its presence in a vast majority of bioactive natural products and pharmaceuticals. Asymmetric organocatalysis methods have emerged as a powerful methodology for the construction of highly ...
Zhonglei Wang
doaj   +1 more source

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