EDA complex-enabled annulation.

Area of Science:

• Organic Chemistry
• Photochemistry
• Synthetic Chemistry

Background:

• Electron donor-acceptor (EDA) complexes can initiate chemical reactions upon light absorption.
• Single electron transfer (SET) within EDA complexes generates reactive radical species.
• These radical species serve as versatile building blocks in organic synthesis.

Purpose of the Study:

• To review recent progress in EDA-enabled photocyclization reactions.
• To highlight the construction of heterocyclic and carbocyclic skeletons.
• To elucidate mechanistic pathways of these transformations.

Main Methods:

• Review of literature from 2021-2025 focusing on EDA photochemistry.
• Analysis of photocyclization reactions utilizing EDA complexes.
• Discussion of reaction mechanisms and conditions.

Main Results:

• EDA complexes facilitate photocatalyst-free transformations via SET.
• Diverse heterocyclic and carbocyclic compounds are synthesized through EDA-enabled photocyclization.
• Mild reaction conditions are often employed, promoting sustainability.

Conclusions:

• EDA photochemistry offers a sustainable approach for synthesizing complex molecules.
• Understanding reaction mechanisms is crucial for optimizing synthetic strategies.
• This methodology provides efficient routes to valuable molecular architectures.