Favorskii Reaction

The Rearrangement Of Cyclopropanones, Often Obtained As Intermediates From The Base-catalyzed Reaction Of α-halo Ketones, Leading To Carboxylic Acids And Derivatives.

Mechanism Of The Favorskii Reaction

Esters Are Obtained If Alkoxide Bases Are Used:

A Direct Conversion From α-halo Ketones Is Possible:

Ring-contraction:

Recent Literature

Halocycloalkenones As Diels-Alder Dienophiles. Applications To Generating Useful Structural Patterns
A. G. Ross, S. D. Townsend, S. J. Danishefsky, J. Org. Chem., 2013, 78, 204-210.