Related Experiment Video
Updated: Apr 16, 2026
08:25
Development of Heterogeneous Enantioselective Catalysts using Chiral Metal-Organic Frameworks MOFs
Published on: January 17, 2020
7.9K
Chiral poly-rare earth metal complexes in asymmetric catalysis
1Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo, Japan .
Summary
Researchers developed bifunctional asymmetric catalysts that activate two substrates simultaneously. This approach enhances enantioselectivity and catalyst activity, enabling efficient synthesis of pharmaceuticals and natural products.
Area of Science:
- Organic Chemistry
- Catalysis
- Synthetic Chemistry
Background:
- Asymmetric catalysis is vital in modern synthetic organic chemistry.
- Developing new catalyst design concepts is essential to expand its utility.
- Simultaneous activation of two reacting substrates can improve enantioselectivity and catalyst activity.
Purpose of the Study:
- To introduce the concept of bifunctional asymmetric catalysis.
- To design novel asymmetric catalysts with dual functionalities.
- To demonstrate the broad applicability and efficiency of these catalysts.
Main Methods:
- Design of bifunctional asymmetric catalysts incorporating two distinct functionalities (e.g., Lewis acid and Brønsted base, or Lewis acid and Lewis base).
- Application of these catalysts in various organic reactions.
- Utilizing the developed catalytic asymmetric reactions in total synthesis.
Main Results:
- The designed bifunctional catalysts exhibited broad reaction applicability.
- Excellent substrate generality was observed across different reactions.
- Efficient total syntheses of pharmaceuticals and biologically active natural products were achieved using these catalysts.
Conclusions:
- Bifunctional asymmetric catalysis is a powerful strategy for enhancing catalyst performance.
- The developed catalysts offer a versatile platform for complex molecule synthesis.
- This approach significantly contributes to the field of asymmetric catalysis and organic synthesis.
More Related Videos
Related Concept Videos
02:17Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
4.1K
Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
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...
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...
4.1K
01:19Complexation Equilibria: The Chelate Effect
1.6K
In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
1.6K
01:22Heterogeneous Catalysis
128
Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...
128
02:51Metal-Ligand Bonds
25.9K
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
25.9K
02:30Chirality at Nitrogen, Phosphorus, and Sulfur
7.5K
Chirality is most prevalent in carbon-based tetrahedral compounds, but this important facet of molecular symmetry extends to sp3-hybridized nitrogen, phosphorus and sulfur centers, including trivalent molecules with lone pairs. Here, the lone pair behaves as a functional group in addition to the other three substituents to form an analogous tetrahedral center that can be chiral.
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
7.5K
02:05Prochirality
5.4K
The concept of prochirality leads to the nomenclature of the individual faces of a molecule and plays a crucial role in the enantioselective reaction. It is a concept where two or more achiral molecules react to produce chiral products. A typical process is the reaction of an achiral ketone to generate a chiral alcohol. Here, the achiral reactant reacts with an achiral reducing agent, sodium borohydride, to generate an equimolar mixture of the chiral enantiomers of the product. For example, an...
5.4K