Related Experiment Video
Updated: May 11, 2026
![Mizoroki-Heck Cross-coupling Reactions Catalyzed by Dichloro{bis[1,1',1''-(phosphinetriyl)tripiperidine]}palladium Under Mild Reaction Conditions](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F51444.jpg&w=3840&q=50)
Mizoroki-Heck Cross-coupling Reactions Catalyzed by Dichloro{bis[1,1',1''-(phosphinetriyl)tripiperidine]}palladium Under Mild Reaction Conditions
Published on: March 20, 2014
Efficient catalysts for asymmetric Mannich reactions
Michał Rachwalski1, Tim Leenders, Sylwia Kaczmarczyk
1Radboud University Nijmegen, Institute for Molecules and Materials, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands. m.rachwalski@science.ru.nl
New chiral catalysts enable efficient asymmetric Mannich reactions, yielding valuable beta-amino carbonyl compounds with high selectivity. Optimization using ultrasonication improved results.
Area of Science:
- Organic Chemistry
- Asymmetric Catalysis
Background:
- The Mannich reaction is a fundamental carbon-carbon bond-forming reaction in organic synthesis.
- Direct asymmetric Mannich reactions are highly sought after for creating chiral building blocks.
Purpose of the Study:
- To develop efficient chiral catalysts for direct asymmetric three-component Mannich reactions.
- To optimize reaction conditions and evaluate catalyst structural influences.
Main Methods:
- Utilized ultrasonication to enhance reaction rates and efficiency.
- Investigated the impact of catalyst structure on yield and stereoselectivity.
- Performed three-component Mannich reactions with ketones, aldehydes, and p-anisidine.
Main Results:
- Achieved good chemical yields of beta-amino carbonyl compounds (Mannich adducts).
- Obtained excellent enantio- and diastereoselectivities in the Mannich products.
- Identified key structural features of catalysts influencing reaction outcomes.
Conclusions:
- Developed effective chiral catalysts for asymmetric Mannich reactions.
- Demonstrated the utility of ultrasonication in optimizing the reaction.
- Provided insights into catalyst design for stereoselective synthesis.
More Related Videos
19:58Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions
Published on: July 30, 2017
06:31Highly Stereoselective Synthesis of 1,6-Ketoesters Mediated by Ionic Liquids: A Three-component Reaction Enabling Rapid Access to a New Class of Low Molecular Weight Gelators
Published on: November 27, 2015
Related Concept Videos
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide
Regioselectivity of Electrophilic Additions to Alkenes: Markovnikov's Rule
The hydrohalogenation of an unsymmetrical alkene can yield two haloalkane products, depending on which vinylic carbon takes up the halogen. However, one product usually predominates, where hydrogen adds to the vinylic carbon bearing the...
Preparation of 1° Amines: Hofmann and Curtius Rearrangement Overview
Diels–Alder Reaction: Characteristics of Dienophiles
Characteristics of Dienophiles
Generally, the best dienophiles are alkenes containing electron-withdrawing substituents such as carbonyl, nitrile, and nitro groups. The feasibility of a Diels–Alder reaction depends on...
ortho–para-Directing Activators: –CH3, –OH, –⁠NH2, –OCH3