Atherton-Todd reaction: mechanism, scope and applications

Area of Science:

• Organic Chemistry
• Synthetic Chemistry

Background:

• The Atherton-Todd (AT) reaction was initially developed for phosphoramidate synthesis using dialkyl phosphite, primary amines, and carbon tetrachloride.
• Over time, modifications have optimized reaction conditions and expanded its utility to various nucleophiles.

Purpose of the Study:

• To review and discuss the mechanism of the Atherton-Todd reaction, addressing historical controversies.
• To present the scope and diverse applications of the AT reaction, focusing on recent advancements.
• To highlight exemplary applications in phosphate activation, fire retardant synthesis, and biologically relevant compounds.

Main Methods:

• Literature review and analysis of the Atherton-Todd reaction mechanism.
• Exploration of reaction scope with different nucleophiles.
• Case studies of AT reaction applications over the past 15 years.

Main Results:

• Optimized reaction conditions and expanded scope for the Atherton-Todd reaction.
• Discussion of controversial mechanistic aspects.
• Demonstration of AT reaction utility in activating phenols, creating fire retardants, and synthesizing biologically active molecules.

Conclusions:

• The Atherton-Todd reaction is a versatile synthetic tool with a well-defined scope.
• Recent applications showcase its importance in diverse fields, from materials science to medicinal chemistry.
• Further mechanistic understanding and application development are anticipated.