Related Experiment Video
Updated: Jul 1, 2025
07:36
Versatile CO2 Transformations into Complex Products: A One-pot Two-step Strategy
Published on: November 9, 2019
8.0K
Progress in Lewis-Acid-Templated Diels-Alder Reactions
1Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 853-8521, Japan.
Molecules (Basel, Switzerland)
|March 13, 2024
Summary
Template-mediated Diels-Alder reactions offer a powerful strategy for synthesizing complex bicyclic gamma-lactones. This method enables stereoselective construction of key building blocks for natural product synthesis.
Area of Science:
- Organic Chemistry
- Synthetic Chemistry
- Natural Product Synthesis
Background:
- Complex natural product synthesis demands versatile building blocks with controlled stereochemistry.
- Bicyclic gamma-lactones are valuable synthons but their stereoselective synthesis remains challenging.
- Template-mediated Diels-Alder reactions provide an efficient route to functionalized bicyclic gamma-lactones.
Purpose of the Study:
- To review the application of template-mediated Diels-Alder reactions in synthesizing bicyclic gamma-lactones.
- To highlight the stereoselective construction of these lactones for natural product synthesis.
- To showcase examples of biologically active compounds synthesized using this methodology.
Main Methods:
- Utilizing template-mediated Diels-Alder reactions for bicyclic gamma-lactone formation.
- Employing temporary tethers to link dienes and dienophiles.
- Achieving high regioselectivity and stereoselectivity in the cycloaddition.
Main Results:
- Demonstrated the efficiency and versatility of template-mediated Diels-Alder reactions.
- Provided access to functionalized bicyclic gamma-lactones with desired stereocenters.
- Facilitated the synthesis of complex, biologically active natural products.
Conclusions:
- Template-mediated Diels-Alder reactions are a key strategy for stereoselective bicyclic gamma-lactone synthesis.
- This approach significantly aids in the construction of intricate natural product architectures.
- The methodology offers a reliable pathway for accessing valuable synthetic intermediates.
Related Concept Videos
![[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2Ffiles%2Fmedia%2Fscience-education%2Fscience-education-thumbs%2F12417.jpg&w=3840&q=75)
01:16[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction
10.1K
The Diels–Alder reaction is an example of a thermal pericyclic reaction between a conjugated diene and an alkene or alkyne, commonly referred to as a dienophile. The reaction involves a concerted movement of six π electrons, four from the diene and two from the dienophile, forming an unsaturated six-membered ring. As a result, these reactions are classified as [4+2] cycloadditions.
10.1K
01:28Diels–Alder Reaction Forming Cyclic Products: Stereochemistry
3.9K
The Diels–Alder reaction is one of the robust methods for synthesizing unsaturated six-membered rings. The reaction involves a concerted cyclic movement of six π electrons: four π electrons from the diene and two π electrons from the dienophile.
3.9K
01:29Diels–Alder Reaction: Characteristics of Dienes
4.1K
The Diels–Alder reaction brings together a diene and a dienophile to form a six-membered ring. Both components have unique characteristics that influence the rate of the reaction.
Characteristics of the diene
Conformation
The simplest example of a diene is 1,3-butadiene, an acyclic conjugated π system. At room temperature, the molecule exists as a mixture of s-cis and s-trans conformers by virtue of rotation around the carbon–carbon single bond. Although the s-trans isomer is...
Characteristics of the diene
Conformation
The simplest example of a diene is 1,3-butadiene, an acyclic conjugated π system. At room temperature, the molecule exists as a mixture of s-cis and s-trans conformers by virtue of rotation around the carbon–carbon single bond. Although the s-trans isomer is...
4.1K
01:29Diels–Alder Reaction Forming Bridged Bicyclic Products: Stereochemistry
4.6K
Diels–Alder reactions between cyclic dienes locked in an s-cis configuration and dienophiles yield bridged bicyclic products.
4.6K
01:24Diels–Alder Reaction: Characteristics of Dienophiles
6.1K
In a Diels–Alder reaction, the diene is usually an electron-rich system and acts as a nucleophile, whereas the dienophile is electron-deficient and functions as an electrophile. Much like the diene, the nature of the dienophile significantly impacts the outcome of the reaction.
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...
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...
6.1K
01:31Diels–Alder vs Retro-Diels–Alder Reaction: Thermodynamic Factors
4.9K
The Diels–Alder reaction is thermally reversible, meaning that the reaction reverts to the starting diene and dienophile under suitable temperatures. The forward reaction gives a cyclohexene derivative and is favored at low to medium temperatures. The reverse process, also called retro-Diels–Alder reaction, is a ring-opening process favored at high temperatures.
4.9K