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Related Concept Videos

Diels–Alder Reaction Forming Bridged Bicyclic Products: Stereochemistry01:29

Diels–Alder Reaction Forming Bridged Bicyclic Products: Stereochemistry

Diels–Alder reactions between cyclic dienes locked in an s-cis configuration and dienophiles yield bridged bicyclic products.
[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction01:16

[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction

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.
Diels–Alder Reaction Forming Cyclic Products: Stereochemistry01:28

Diels–Alder Reaction Forming Cyclic Products: Stereochemistry

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.
Diels–Alder Reaction: Characteristics of Dienes01:29

Diels–Alder Reaction: Characteristics of Dienes

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 more stable, the...
Cycloaddition Reactions: Overview01:16

Cycloaddition Reactions: Overview

Cycloadditions are one of the most valuable and effective synthesis routes to form cyclic compounds. These are concerted pericyclic reactions between two unsaturated compounds resulting in a cyclic product with two new σ bonds formed at the expense of π bonds. The [4 + 2] cycloaddition, known as the Diels–Alder reaction, is the most common. The other example is a [2 + 2] cycloaddition.
Diels–Alder Reaction: Characteristics of Dienophiles01:24

Diels–Alder Reaction: Characteristics of Dienophiles

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 on...

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Related Experiment Video

Updated: Jun 10, 2026

Microwave-assisted Intramolecular Dehydrogenative Diels-Alder Reactions for the Synthesis of Functionalized Naphthalenes/Solvatochromic Dyes
12:07

Microwave-assisted Intramolecular Dehydrogenative Diels-Alder Reactions for the Synthesis of Functionalized Naphthalenes/Solvatochromic Dyes

Published on: April 1, 2013

A Diels-Alder Route to Angularly Functionalized Bicyclic Structures.

Woo Han Kim1, Jun Hee Lee, Baptiste Aussedat

  • 1Laboratory for Bioorganic Chemistry, Sloan-Kettering Institute for Cancer Research, 1275 York Avenue, New York, NY 10065.

Tetrahedron
|August 19, 2010
PubMed
Summary
This summary is machine-generated.

A new Diels-Alder reaction creates functionalized bicyclic molecules using a tetrasubstituted dienophile. This method efficiently synthesizes complex trans-fused angular structures.

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Area of Science:

  • Organic Chemistry
  • Synthetic Chemistry

Background:

  • Bicyclic structures are prevalent in natural products and pharmaceuticals.
  • Efficient synthesis of functionalized bicyclic scaffolds remains a challenge.

Purpose of the Study:

  • To develop a novel Diels-Alder reaction for constructing trans-fused bicyclic systems.
  • To introduce angular functionalization via a cycloaddition strategy.

Main Methods:

  • Utilized a Diels-Alder cycloaddition reaction.
  • Employed a tetrasubstituted dienophile in the key step.
  • Developed a route to trans-fused angularly functionalized bicyclic structures.

Main Results:

  • Successfully synthesized complex bicyclic structures.
  • Demonstrated the utility of tetrasubstituted dienophiles in Diels-Alder reactions.
  • Achieved angular functionalization in the bicyclic products.

Conclusions:

  • The developed Diels-Alder route provides efficient access to valuable bicyclic compounds.
  • This methodology offers a new strategy for synthesizing functionalized bicyclic architectures.