λ⁵-Phosphorus-Containing α-Diazo Compounds: A Valuable Tool for Accessing Phosphorus-Functionalized Molecules

Area of Science:

• Organic Chemistry
• Organophosphorus Chemistry

Background:

• λ⁵-phosphorus-containing α-diazo compounds (PCDCs) are highly reactive and versatile reagents.
• Their utility is particularly noted in the synthesis of phosphonate- and phosphinoxide-functionalized molecules.

Purpose of the Study:

• To review the ongoing utility of PCDCs in modern organic synthesis.
• To summarize the preparation methods for PCDCs, addressing a lack of collective papers.

Main Methods:

• PCDCs undergo various transformations including insertion reactions, cyclopropanation, ylide formation, Wolff rearrangement, and cycloaddition.
• Preparation methods include diazotization, Bamford-Stevens-type elimination, and diazo transfer reactions.

Main Results:

• PCDCs enable the preparation of diverse phosphorus-containing compounds, especially phosphonates.
• Their relative stability and ease of preparation make them valuable synthetic tools.

Conclusions:

• PCDCs are essential reagents in contemporary organic synthesis for creating phosphorus-based molecules.
• This review provides a comprehensive overview of their preparation and synthetic applications.