A nickel-catalyzed base-promoted rearrangement of cyclobutanone oxime esters to cyclopropanecarbonitriles
was developed. The ring opening of cyclobutanone oxime esters occurs at the sterically
less hindered side. A base-promoted nickelacyclobutane intermediate, formed in situ,
is assumed to be involved in the formation of the product.
Key words
nickel catalysis - cyclobutanone oxime esters - cyclopropanecarbonitriles - ring opening
- Favorskii rearrangement