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Related Concept Videos

[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 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.
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...
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.

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Updated: May 30, 2026

The Preparation and Properties of Thermo-reversibly Cross-linked Rubber Via Diels-Alder Chemistry
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The Preparation and Properties of Thermo-reversibly Cross-linked Rubber Via Diels-Alder Chemistry

Published on: August 25, 2016

Patterned surface derivatization using Diels-Alder photoclick reaction.

Selvanathan Arumugam1, Vladimir V Popik

  • 1Department of Chemistry, University of Georgia, Athens, Georgia 30602, USA.

Journal of the American Chemical Society
|August 25, 2011
PubMed
Summary

Photochemically generated 2-napthoquinone-3-methide (oNQM) enables efficient, catalyst-free surface patterning via hetero Diels-Alder click chemistry in aqueous solution. This photoclick strategy offers precise spatial control for light-directed derivatization.

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

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Chemoselective Modification of Viral Surfaces via Bioorthogonal Click Chemistry
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Chemoselective Modification of Viral Surfaces via Bioorthogonal Click Chemistry

Published on: August 19, 2012

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Last Updated: May 30, 2026

The Preparation and Properties of Thermo-reversibly Cross-linked Rubber Via Diels-Alder Chemistry
07:02

The Preparation and Properties of Thermo-reversibly Cross-linked Rubber Via Diels-Alder Chemistry

Published on: August 25, 2016

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

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Chemoselective Modification of Viral Surfaces via Bioorthogonal Click Chemistry
12:31

Chemoselective Modification of Viral Surfaces via Bioorthogonal Click Chemistry

Published on: August 19, 2012

Area of Science:

  • Organic Chemistry
  • Materials Science
  • Surface Chemistry

Background:

  • Surface derivatization and patterning are crucial for advanced materials and devices.
  • Existing methods often require harsh conditions, catalysts, or multiple steps.
  • Photochemical reactions offer spatial control but can be limited by reagent stability and diffusion.

Purpose of the Study:

  • To demonstrate a novel photoclick chemistry strategy for light-directed surface derivatization and patterning.
  • To utilize photochemically induced hetero-Diels-Alder reactions for efficient surface functionalization.
  • To develop a catalyst-free, aqueous-based method for precise surface modification.

Main Methods:

  • Glass slides were functionalized with vinyl ether moieties.
  • Substrates conjugated to 3-(hydroxymethyl)-2-naphthol (NQMP) were dissolved in an aqueous solution.
  • Irradiation through a shadow mask generated reactive 2-napthoquinone-3-methide (oNQM) in situ.
  • The oNQM underwent hetero Diels-Alder addition with immobilized vinyl ethers.

Main Results:

  • Efficient conversion of NQMP to oNQM upon irradiation.
  • Rapid and high-yield hetero Diels-Alder addition of oNQM to vinyl ethers, forming stable covalent links.
  • The reaction proceeded efficiently in aqueous solution under ambient conditions without catalysts.
  • The short lifetime of oNQM prevented diffusion, enabling high spatial resolution patterning.
  • The method demonstrated orthogonality to other click chemistry reactions.

Conclusions:

  • Photochemically induced hetero-Diels-Alder reaction provides a versatile and efficient photoclick strategy for surface patterning.
  • This aqueous-based, catalyst-free method allows for precise, light-directed surface derivatization with high spatial control.
  • The approach overcomes limitations of traditional methods, offering a new paradigm in photopatterning technology.